)]}' { "log": [ { "commit": "57dfee7c3f1fcac24e986b69bdfdccc8ea025813", "tree": "405d4e39233bc593b0d975c869d8684c15ccd043", "parents": [ "00bf59ca9bfe4085e6ee546128a71b82d061ab04" ], "author": { "name": "Finn Thain", "email": "fthain@telegraphics.com.au", "time": "Mon Feb 04 22:30:30 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:24 2008 -0800" }, "message": "mac68k: add nubus card definitions and a typo fix\n\nAdd some new card definitions and fix a typo (from Eugen Paiuc).\n\nSigned-off-by: Finn Thain \u003cfthain@telegraphics.com.au\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "00bf59ca9bfe4085e6ee546128a71b82d061ab04", "tree": "eb513f442c59eed55e44741f8f1f5cb7a3cc258f", "parents": [ "eb4da4cec30309e3b3d584616e32318cc8f6d63c" ], "author": { "name": "Finn Thain", "email": "fthain@telegraphics.com.au", "time": "Mon Feb 04 22:30:29 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:24 2008 -0800" }, "message": "mac68k: remove dead code\n\nSigned-off-by: Finn Thain \u003cfthain@telegraphics.com.au\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "eb4da4cec30309e3b3d584616e32318cc8f6d63c", "tree": "638406a60afcec89fa976aa7411e08ed7682c2e6", "parents": [ "612e484fdb8802ffee84218cb35f3cff61a9c8c6" ], "author": { "name": "Finn Thain", "email": "fthain@telegraphics.com.au", "time": "Mon Feb 04 22:30:27 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:24 2008 -0800" }, "message": "mac68k: macii adb comment correction\n\nCorrects a mistake I made in a comment.\n\nSigned-off-by: Finn Thain \u003cfthain@telegraphics.com.au\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "612e484fdb8802ffee84218cb35f3cff61a9c8c6", "tree": "5af95e90164bbc8566d110aa6e0d9366cf42566e", "parents": [ "a3b2004a2671455ee7aef1d9aee5a24381999ddb" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:27 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:24 2008 -0800" }, "message": "m68k: kill arch/m68k/mvme16x/mvme16x_ksyms.c\n\nEXPORT_SYMBOL\u0027s belong to the actual code.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a3b2004a2671455ee7aef1d9aee5a24381999ddb", "tree": "046d7e755e2a30a1c5d54de383362ca04220cd36", "parents": [ "8b169fa2c942bc2a579da3f33986bd3fc48d9684" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:26 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:24 2008 -0800" }, "message": "m68k: kill arch/m68k/atari/atari_ksyms.c\n\nEXPORT_SYMBOL\u0027s belong to the actual code.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8b169fa2c942bc2a579da3f33986bd3fc48d9684", "tree": "cc5a663d53f530cb10abd9f41516157e2b31f7fe", "parents": [ "3456fef5d988e9014cd318a3ae7991c9a03c8cf2" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:25 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "m68k: kill arch/m68k/amiga/amiga_ksyms.c\n\nEXPORT_SYMBOL\u0027s belong to the actual code.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3456fef5d988e9014cd318a3ae7991c9a03c8cf2", "tree": "1752d28e72728d8f2df5ae7d41f46a9b703e9c0a", "parents": [ "deea7775e2ae460aace0bf7b5bb2ff3b412017f1" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:25 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "m68k: kill arch/m68k/hp300/ksyms.c\n\nIt was empty.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "deea7775e2ae460aace0bf7b5bb2ff3b412017f1", "tree": "45e0a8d98eaba1aa922bc1045c285c23227aa965", "parents": [ "99ffab81071b7088ddebd4be9bbf1ad03c2a9e98" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:24 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "m68k: kill arch/m68k/mac/mac_ksyms.c\n\nEXPORT_SYMBOL\u0027s belong to the actual code.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "99ffab81071b7088ddebd4be9bbf1ad03c2a9e98", "tree": "f441fef8f22b3f74c9803ae5dcf1d4c07649ffe3", "parents": [ "96762379915f0c46bfac566038e66dee3dd0e7b5" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:23 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "nubus: kill drivers/nubus/nubus_syms.c\n\nnubus: kill drivers/nubus/nubus_syms.c\n\nEXPORT_SYMBOL\u0027s belong to the actual code.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "96762379915f0c46bfac566038e66dee3dd0e7b5", "tree": "a98ff73b9cf778972dd42059e2b886582c556e9f", "parents": [ "0a8320b04c0762a1c65b5800b84023b454c2da54" ], "author": { "name": "Roel Kluin", "email": "12o3l@tiscali.nl", "time": "Mon Feb 04 22:30:22 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "m68k: Balance ioremap and iounmap in m68k/atari/hades-pci.c\n\nSigned-off-by: Roel Kluin \u003c12o3l@tiscali.nl\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0a8320b04c0762a1c65b5800b84023b454c2da54", "tree": "cc73c9304a5c4ca56e337683a44730724d6688d7", "parents": [ "b9e5e119fd9905c2a06f73a96f9c18aa760a8a65" ], "author": { "name": "Alejandro Martinez Ruiz", "email": "alex@flawedcode.org", "time": "Mon Feb 04 22:30:19 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "dio: ARRAY_SIZE() cleanup\n\n[Geert: eliminate NUMNAMES, as suggested by Richard Knutsson ]\n[akpm@linux-foundation.org: coding-syle fixes]\nSigned-off-by: Alejandro Martinez Ruiz \u003calex@flawedcode.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Richard Knutsson \u003cricknu-0@student.ltu.se\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b9e5e119fd9905c2a06f73a96f9c18aa760a8a65", "tree": "9029956bcba57ac2eee4ab688e4a9fdbffb963a9", "parents": [ "6f7127db311fe3e0ea6a2a332833f85abab6cb4b" ], "author": { "name": "Alejandro Martinez Ruiz", "email": "alex@flawedcode.org", "time": "Mon Feb 04 22:30:17 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "m68k: ARRAY_SIZE() cleanup\n\nSigned-off-by: Alejandro Martinez Ruiz \u003calex@flawedcode.org\u003e\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6f7127db311fe3e0ea6a2a332833f85abab6cb4b", "tree": "3e87df2a1c0d0cf4fb9bc569bea79daf40802a7d", "parents": [ "3506e0c49a5ceba72c0405d1a470184c2d6705f7" ], "author": { "name": "Geert Uytterhoeven", "email": "geert@linux-m68k.org", "time": "Mon Feb 04 22:30:17 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "m68k: Use cc-cross-prefix\n\nThe cc-cross-prefix is new and developed on request from Geert Uytterhoeven.\n\nWith cc-cross-prefix it is now much easier to have a few default cross compile\nprefixes and defaulting to none - if none of them were present. ARCH\nmaintainers are expected to pick up this feature soon.\n\nSigned-off-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Andreas Schwab \u003cschwab@suse.de\u003e\nCc: Sam Ravnborg \u003csam@ravnborg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3506e0c49a5ceba72c0405d1a470184c2d6705f7", "tree": "960333db4879feb5a0615d96687909a186a83ff3", "parents": [ "fa23f5cce8cda2095013afc837ccf74b352f9f7b" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Mon Feb 04 22:30:15 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "b43: avoid unregistering device objects during suspend\n\nModify the b43 driver to avoid deadlocking suspend and resume, which happens\nas a result of attempting to unregister device objects locked by the PM core\nduring suspend/resume cycles. Also, make it use a suspend-safe method of\nunregistering device object in the resume error path.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: Alan Stern \u003cstern@rowland.harvard.edu\u003e\nCc: Len Brown \u003clenb@kernel.org\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nCc: Richard Purdie \u003crpurdie@rpsys.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fa23f5cce8cda2095013afc837ccf74b352f9f7b", "tree": "bdb22c6966b9e60eb90c97086f3ceed453223f97", "parents": [ "a41e3dc4060cca2599afa14fbd4c745763746ba8" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Mon Feb 04 22:30:14 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "leds: add possibility to remove leds classdevs during suspend/resume\n\nMake it possible to unregister a led classdev object in a safe way during a\nsuspend/resume cycle.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: Alan Stern \u003cstern@rowland.harvard.edu\u003e\nCc: Len Brown \u003clenb@kernel.org\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nCc: Richard Purdie \u003crpurdie@rpsys.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a41e3dc4060cca2599afa14fbd4c745763746ba8", "tree": "c97d189602b6564054f348dbfc2c865baafecd96", "parents": [ "533354d4ac48b7df99f18f952e5d51c3f59ba56c" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Mon Feb 04 22:30:13 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "HWRNG: add possibility to remove hwrng devices during suspend/resume\n\nMake it possible to unregister a Hardware Random Number Generator\ndevice object in a safe way during a suspend/resume cycle.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nAcked-by: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: Alan Stern \u003cstern@rowland.harvard.edu\u003e\nCc: Len Brown \u003clenb@kernel.org\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nCc: Richard Purdie \u003crpurdie@rpsys.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "533354d4ac48b7df99f18f952e5d51c3f59ba56c", "tree": "d1d5616e39d58ce8f27127901d43d4b0b0f69fa5", "parents": [ "f011e2e2df3393c16b0fdc48e855e909b7e021ee" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Mon Feb 04 22:30:11 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:23 2008 -0800" }, "message": "Misc: Add possibility to remove misc devices during suspend/resume\n\nMake it possible to unregister a misc device object in a safe way during a\nsuspend/resume cycle.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: Alan Stern \u003cstern@rowland.harvard.edu\u003e\nCc: Len Brown \u003clenb@kernel.org\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nCc: Richard Purdie \u003crpurdie@rpsys.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f011e2e2df3393c16b0fdc48e855e909b7e021ee", "tree": "1ad56011597c739336d7068c8182fd9cfdddad5b", "parents": [ "d82b35186eaa816267f044bd70cc0acb3c7971a3" ], "author": { "name": "Mark Gross", "email": "mgross@linux.intel.com", "time": "Mon Feb 04 22:30:09 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:22 2008 -0800" }, "message": "latency.c: use QoS infrastructure\n\nReplace latency.c use with pm_qos_params use.\n\nSigned-off-by: mark gross \u003cmgross@linux.intel.com\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: Len Brown \u003clenb@kernel.org\u003e\nCc: Jaroslav Kysela \u003cperex@suse.cz\u003e\nCc: Takashi Iwai \u003ctiwai@suse.de\u003e\nCc: Arjan van de Ven \u003carjan@infradead.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d82b35186eaa816267f044bd70cc0acb3c7971a3", "tree": "e8de56c122fd8040086e974895afbb8299045c0f", "parents": [ "4ef7229ffa93695e346d510b871452811509ea65" ], "author": { "name": "Mark Gross", "email": "mgross@linux.intel.com", "time": "Mon Feb 04 22:30:08 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:22 2008 -0800" }, "message": "pm qos infrastructure and interface\n\nThe following patch is a generalization of the latency.c implementation done\nby Arjan last year. It provides infrastructure for more than one parameter,\nand exposes a user mode interface for processes to register pm_qos\nexpectations of processes.\n\nThis interface provides a kernel and user mode interface for registering\nperformance expectations by drivers, subsystems and user space applications on\none of the parameters.\n\nCurrently we have {cpu_dma_latency, network_latency, network_throughput} as\nthe initial set of pm_qos parameters.\n\nThe infrastructure exposes multiple misc device nodes one per implemented\nparameter. The set of parameters implement is defined by pm_qos_power_init()\nand pm_qos_params.h. This is done because having the available parameters\nbeing runtime configurable or changeable from a driver was seen as too easy to\nabuse.\n\nFor each parameter a list of performance requirements is maintained along with\nan aggregated target value. The aggregated target value is updated with\nchanges to the requirement list or elements of the list. Typically the\naggregated target value is simply the max or min of the requirement values\nheld in the parameter list elements.\n\n\u003eFrom kernel mode the use of this interface is simple:\n\npm_qos_add_requirement(param_id, name, target_value):\n\n Will insert a named element in the list for that identified PM_QOS\n parameter with the target value. Upon change to this list the new target is\n recomputed and any registered notifiers are called only if the target value\n is now different.\n\npm_qos_update_requirement(param_id, name, new_target_value):\n\n Will search the list identified by the param_id for the named list element\n and then update its target value, calling the notification tree if the\n aggregated target is changed. with that name is already registered.\n\npm_qos_remove_requirement(param_id, name):\n\n Will search the identified list for the named element and remove it, after\n removal it will update the aggregate target and call the notification tree\n if the target was changed as a result of removing the named requirement.\n\n\u003eFrom user mode:\n\n Only processes can register a pm_qos requirement. To provide for\n automatic cleanup for process the interface requires the process to register\n its parameter requirements in the following way:\n\n To register the default pm_qos target for the specific parameter, the\n process must open one of /dev/[cpu_dma_latency, network_latency,\n network_throughput]\n\n As long as the device node is held open that process has a registered\n requirement on the parameter. The name of the requirement is\n \"process_\u003cPID\u003e\" derived from the current-\u003epid from within the open system\n call.\n\n To change the requested target value the process needs to write a s32\n value to the open device node. This translates to a\n pm_qos_update_requirement call.\n\n To remove the user mode request for a target value simply close the device\n node.\n\n[akpm@linux-foundation.org: fix warnings]\n[akpm@linux-foundation.org: fix build]\n[akpm@linux-foundation.org: fix build again]\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: mark gross \u003cmgross@linux.intel.com\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: Len Brown \u003clenb@kernel.org\u003e\nCc: Jaroslav Kysela \u003cperex@suse.cz\u003e\nCc: Takashi Iwai \u003ctiwai@suse.de\u003e\nCc: Arjan van de Ven \u003carjan@infradead.org\u003e\nCc: Venki Pallipadi \u003cvenkatesh.pallipadi@intel.com\u003e\nCc: Adam Belay \u003cabelay@novell.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4ef7229ffa93695e346d510b871452811509ea65", "tree": "052adef3a8cc1e8d502525f3355e99d5e8d9dcda", "parents": [ "47a460d5a307e639d6c9cdf9bb4857e2f5f3cb76" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:06 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:22 2008 -0800" }, "message": "make kernel_shutdown_prepare() static\n\nkernel_shutdown_prepare() can now become static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "47a460d5a307e639d6c9cdf9bb4857e2f5f3cb76", "tree": "afdb7f011316551978d301f4a7fcd79f347d8b33", "parents": [ "cbed6c6e0f7a52859fd0207ef3ffcf4bfffdbf95" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:06 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:22 2008 -0800" }, "message": "kernel/power/disk.c: make code static\n\nresume_file[] and create_image() can become static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cbed6c6e0f7a52859fd0207ef3ffcf4bfffdbf95", "tree": "ff21f3c6c889965a4856f4d3ed9536d3dce7b007", "parents": [ "6d6f8d52fd0ff5d3660368232f71c3224d7508e1" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Mon Feb 04 22:30:05 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:22 2008 -0800" }, "message": "alpha: fix warning by fixing flush_tlb_kernel_range()\n\nmm/vmalloc.c: In function \u0027unmap_kernel_range\u0027:\nmm/vmalloc.c:75: warning: unused variable \u0027start\u0027\n\nMacros are so horrid.\n\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6d6f8d52fd0ff5d3660368232f71c3224d7508e1", "tree": "990a3785e805a6e1822e57b867cdcdb17cd8794a", "parents": [ "2f78dcfd30955a48a2e738d08e4001ebd0e8402c" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Feb 04 22:30:04 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:22 2008 -0800" }, "message": "agp: alpha nopage\n\nConvert AGP alpha driver from nopage to fault.\nNULL is NOPAGE_SIGBUS, so we aren\u0027t changing behaviour there.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2f78dcfd30955a48a2e738d08e4001ebd0e8402c", "tree": "968cd637194080813fee148df4176b7b50ff0e78", "parents": [ "fd2e2633c208e111348c9f84fd7eeb9c844aca02" ], "author": { "name": "Samuel Thibault", "email": "samuel.thibault@citrix.com", "time": "Mon Feb 04 22:30:03 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "Alpha doesn\u0027t use socketcall\n\nAlpha doesn\u0027t use socketcall and doesn\u0027t provide __NR_socketcall.\n\nSigned-off-by: Samuel Thibault \u003csamuel.thibault@citrix.com\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fd2e2633c208e111348c9f84fd7eeb9c844aca02", "tree": "68ce64d906cca7ba9f354b8b85b0eb2d5f32e44a", "parents": [ "26a6e661b118b95422ccfcd10c9997db5967df58" ], "author": { "name": "FUJITA Tomonori", "email": "tomof@acm.org", "time": "Mon Feb 04 22:30:02 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "alpha: kill deprecated virt_to_bus\n\npci-noop.c doesn\u0027t use DMA mappings.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "26a6e661b118b95422ccfcd10c9997db5967df58", "tree": "949c2a205da22372c603f125e8d1d7c1eaaa67dc", "parents": [ "e820ce72d3aaadb8b53455cbdf213d3439f6c280" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Mon Feb 04 22:30:02 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "alpha: atomic_add_return() should return int\n\nPrevents stuff like\n\ndrivers/crypto/hifn_795x.c:2443: warning: format \u0027%d\u0027 expects type \u0027int\u0027, but argument 4 has type \u0027long int\u0027\ndrivers/crypto/hifn_795x.c:2443: warning: format \u0027%d\u0027 expects type \u0027int\u0027, but argument 4 has type \u0027long int\u0027\n\n(at least).\n\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e820ce72d3aaadb8b53455cbdf213d3439f6c280", "tree": "720e5439fd50a3603a4416c66f6c63518c4410f9", "parents": [ "49eaf7d7f0ec493beb724fbb3c60f37d7b92bc86" ], "author": { "name": "Lucas Woods", "email": "woodzy@gmail.com", "time": "Mon Feb 04 22:30:01 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "arch/alpha: remove duplicate includes\n\nSigned-off-by: Lucas Woods \u003cwoodzy@gmail.com\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "49eaf7d7f0ec493beb724fbb3c60f37d7b92bc86", "tree": "19563300dd0db990cad68a06e35047c492d266d1", "parents": [ "f905bc447c303fefcb180c7e8b641746ffa6cf87" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:30:00 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "m68knommu: remove duplicate exports\n\nOne EXPORT_SYMBOL should be enough for everyone.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: Greg Ungerer \u003cgerg@uclinux.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f905bc447c303fefcb180c7e8b641746ffa6cf87", "tree": "390d3f3490eb6b22a40598775538dd5bbd9653c1", "parents": [ "f156ac8c7aeddb2d85294b7a3b849178625e15e2" ], "author": { "name": "Paul Mundt", "email": "lethal@linux-sh.org", "time": "Mon Feb 04 22:29:59 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "nommu: add new vmalloc_user() and remap_vmalloc_range() interfaces.\n\nThis builds on top of the earlier vmalloc_32_user() work introduced by\nb50731732f926d6c49fd0724616a7344c31cd5cf, as we now have places in the nommu\nallmodconfig that hit up against these missing APIs.\n\nAs vmalloc_32_user() is already implemented, this is moved over to\nvmalloc_user() and simply made a wrapper. As all current nommu platforms are\n32-bit addressable, there\u0027s no special casing we have to do for ZONE_DMA and\nthings of that nature as per GFP_VMALLOC32.\n\nremap_vmalloc_range() needs to check VM_USERMAP in order to figure out whether\nwe permit the remap or not, which means that we also have to rework the\nvmalloc_user() code to grovel for the VMA and set the flag.\n\nSigned-off-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nAcked-by: David McCullough \u003cdavid_mccullough@securecomputing.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nAcked-by: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f156ac8c7aeddb2d85294b7a3b849178625e15e2", "tree": "60fb2b1cc7f8e4eb7f42e9972c67c0231d840f9a", "parents": [ "c155f3f9c54c602823c3970ec8a465ec3f9c2017" ], "author": { "name": "Jiri Olsa", "email": "olsajiri@gmail.com", "time": "Mon Feb 04 22:29:58 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "m68knommu: removing config variable DUMPTOFLASH\n\nRemoving config variable DUMPTOFLASH, since it is not used\n\nSigned-off-by: Jiri Olsa \u003colsajiri@gmail.com\u003e\nAcked-by: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c155f3f9c54c602823c3970ec8a465ec3f9c2017", "tree": "c747e5e5c90f8705bcddcdb22a0bb90452d0e891", "parents": [ "16791963ff7dd6a108251f5fa4b273cf1ffe531f" ], "author": { "name": "Jiri Olsa", "email": "olsajiri@gmail.com", "time": "Mon Feb 04 22:29:58 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "m68knomu: remove dead config symbols from m68knomu code\n\nremove dead config symbols from m68knommu code\n\nSigned-off-by: Jiri Olsa \u003colsajiri@gmail.com\u003e\nAcked-by: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "16791963ff7dd6a108251f5fa4b273cf1ffe531f", "tree": "547938c67fb9c81d1b2f11f33166c7dd9b7e2543", "parents": [ "540e3102f75dca9c5e614905527599de18294cc8" ], "author": { "name": "Greg Ungerer", "email": "gerg@snapgear.com", "time": "Mon Feb 04 22:29:56 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:21 2008 -0800" }, "message": "m68knommu: use ARRAY_SIZE in ColdFire serial driver\n\nUse ARRAY_SIZE macroto get maximum ports in ColdFire serial driver.\n\nSigned-off-by: Greg Ungerer \u003cgerg@uclinux.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "540e3102f75dca9c5e614905527599de18294cc8", "tree": "e5a257f784e99bc50e9bca426f86185a8a87b447", "parents": [ "8c5900b2d669c7aac1e5b3e8bb8e331a0e6cff61" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Mon Feb 04 22:29:56 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "frv: use find_task_by_vpid in cxn_pin_by_pid\n\nThe function is question gets the pid from sysctl table, so this one is a\nvirtual pid, i.e. the pid of a task as it is seen from inside a namespace.\n\nSo the find_task_by_vpid() must be used here.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8c5900b2d669c7aac1e5b3e8bb8e331a0e6cff61", "tree": "a274e1869e45286f9af45ff631375ca05416cbd6", "parents": [ "82b12e232d2a71f566dca48df4ae4548e6d8d53d" ], "author": { "name": "Jiri Olsa", "email": "olsajiri@gmail.com", "time": "Mon Feb 04 22:29:55 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "frv: remove dead config symbol from FRV code\n\nRemove dead config symbol from FRV code.\n\nSigned-off-by: Jiri Olsa \u003colsajiri@gmail.com\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "82b12e232d2a71f566dca48df4ae4548e6d8d53d", "tree": "a727e6dbfe1764e0f684ea8248384e9ad9fdc6b9", "parents": [ "7038220aa511131f348018b85df172a21476fef9" ], "author": { "name": "Robert P. J. Day", "email": "rpjday@crashcourse.ca", "time": "Mon Feb 04 22:29:54 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "FRV: move DMA macros to scatterlist.h for consistency.\n\nTo be consistent with other architectures, these two DMA macros should\nbe defined in scatterlist.h as opposed to dma-mapping.h\n\nSigned-off-by: Robert P. J. Day \u003crpjday@crashcourse.ca\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7038220aa511131f348018b85df172a21476fef9", "tree": "5db462fef58448349701c1b9db4e4bf93dc848ad", "parents": [ "e114e473771c848c3cfec05f0123e70f1cdbdc99" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Mon Feb 04 22:29:53 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "FRV: permit the memory to be located elsewhere in NOMMU mode\n\nPermit the memory to be located somewhere other than address 0xC0000000 in\nNOMMU mode. The configuration options are already present, it just\nrequires wiring up in the linker script.\n\nNote that only a limited set of locations of runtime addresses are available\nbecause of the way the CPU protection registers work.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e114e473771c848c3cfec05f0123e70f1cdbdc99", "tree": "933b840f3ccac6860da56291c742094f9b5a20cb", "parents": [ "eda61d32e8ad1d9102872f9a0abf3344bf9c5e67" ], "author": { "name": "Casey Schaufler", "email": "casey@schaufler-ca.com", "time": "Mon Feb 04 22:29:50 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "Smack: Simplified Mandatory Access Control Kernel\n\nSmack is the Simplified Mandatory Access Control Kernel.\n\nSmack implements mandatory access control (MAC) using labels\nattached to tasks and data containers, including files, SVIPC,\nand other tasks. Smack is a kernel based scheme that requires\nan absolute minimum of application support and a very small\namount of configuration data.\n\nSmack uses extended attributes and\nprovides a set of general mount options, borrowing technics used\nelsewhere. Smack uses netlabel for CIPSO labeling. Smack provides\na pseudo-filesystem smackfs that is used for manipulation of\nsystem Smack attributes.\n\nThe patch, patches for ls and sshd, a README, a startup script,\nand x86 binaries for ls and sshd are also available on\n\n http://www.schaufler-ca.com\n\nDevelopment has been done using Fedora Core 7 in a virtual machine\nenvironment and on an old Sony laptop.\n\nSmack provides mandatory access controls based on the label attached\nto a task and the label attached to the object it is attempting to\naccess. Smack labels are deliberately short (1-23 characters) text\nstrings. Single character labels using special characters are reserved\nfor system use. The only operation applied to Smack labels is equality\ncomparison. No wildcards or expressions, regular or otherwise, are\nused. Smack labels are composed of printable characters and may not\ninclude \"/\".\n\nA file always gets the Smack label of the task that created it.\n\nSmack defines and uses these labels:\n\n \"*\" - pronounced \"star\"\n \"_\" - pronounced \"floor\"\n \"^\" - pronounced \"hat\"\n \"?\" - pronounced \"huh\"\n\nThe access rules enforced by Smack are, in order:\n\n1. Any access requested by a task labeled \"*\" is denied.\n2. A read or execute access requested by a task labeled \"^\"\n is permitted.\n3. A read or execute access requested on an object labeled \"_\"\n is permitted.\n4. Any access requested on an object labeled \"*\" is permitted.\n5. Any access requested by a task on an object with the same\n label is permitted.\n6. Any access requested that is explicitly defined in the loaded\n rule set is permitted.\n7. Any other access is denied.\n\nRules may be explicitly defined by writing subject,object,access\ntriples to /smack/load.\n\nSmack rule sets can be easily defined that describe Bell\u0026LaPadula\nsensitivity, Biba integrity, and a variety of interesting\nconfigurations. Smack rule sets can be modified on the fly to\naccommodate changes in the operating environment or even the time\nof day.\n\nSome practical use cases:\n\nHierarchical levels. The less common of the two usual uses\nfor MLS systems is to define hierarchical levels, often\nunclassified, confidential, secret, and so on. To set up smack\nto support this, these rules could be defined:\n\n C Unclass rx\n S C rx\n S Unclass rx\n TS S rx\n TS C rx\n TS Unclass rx\n\nA TS process can read S, C, and Unclass data, but cannot write it.\nAn S process can read C and Unclass. Note that specifying that\nTS can read S and S can read C does not imply TS can read C, it\nhas to be explicitly stated.\n\nNon-hierarchical categories. This is the more common of the\nusual uses for an MLS system. Since the default rule is that a\nsubject cannot access an object with a different label no\naccess rules are required to implement compartmentalization.\n\nA case that the Bell \u0026 LaPadula policy does not allow is demonstrated\nwith this Smack access rule:\n\nA case that Bell\u0026LaPadula does not allow that Smack does:\n\n ESPN ABC r\n ABC ESPN r\n\nOn my portable video device I have two applications, one that\nshows ABC programming and the other ESPN programming. ESPN wants\nto show me sport stories that show up as news, and ABC will\nonly provide minimal information about a sports story if ESPN\nis covering it. Each side can look at the other\u0027s info, neither\ncan change the other. Neither can see what FOX is up to, which\nis just as well all things considered.\n\nAnother case that I especially like:\n\n SatData Guard w\n Guard Publish w\n\nA program running with the Guard label opens a UDP socket and\naccepts messages sent by a program running with a SatData label.\nThe Guard program inspects the message to ensure it is wholesome\nand if it is sends it to a program running with the Publish label.\nThis program then puts the information passed in an appropriate\nplace. Note that the Guard program cannot write to a Publish\nfile system object because file system semanitic require read as\nwell as write.\n\nThe four cases (categories, levels, mutual read, guardbox) here\nare all quite real, and problems I\u0027ve been asked to solve over\nthe years. The first two are easy to do with traditonal MLS systems\nwhile the last two you can\u0027t without invoking privilege, at least\nfor a while.\n\nSigned-off-by: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nCc: Joshua Brindle \u003cmethod@manicmethod.com\u003e\nCc: Paul Moore \u003cpaul.moore@hp.com\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: \"Ahmed S. Darwish\" \u003cdarwish.07@gmail.com\u003e\nCc: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "eda61d32e8ad1d9102872f9a0abf3344bf9c5e67", "tree": "d1c11a47c97b3f29d54021cd4aa9c0b8963ed0c8", "parents": [ "97829955ad291acec1d8b94e9911b3ceb1118bb1" ], "author": { "name": "Paul Moore", "email": "paul.moore@hp.com", "time": "Mon Feb 04 22:29:47 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "NetLabel: introduce a new kernel configuration API for NetLabel\n\nAdd a new set of configuration functions to the NetLabel/LSM API so that\nLSMs can perform their own configuration of the NetLabel subsystem without\nrelying on assistance from userspace.\n\nSigned-off-by: Paul Moore \u003cpaul.moore@hp.com\u003e\nSigned-off-by: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "97829955ad291acec1d8b94e9911b3ceb1118bb1", "tree": "4af91977d82494375e09a961594f83ca77f253d7", "parents": [ "3b7391de67da515c91f48aa371de77cb6cc5c07e" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Mon Feb 04 22:29:47 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "oom_kill: remove uid\u003d\u003d0 checks\n\nRoot processes are considered more important when out of memory and killing\nproceses. The check for CAP_SYS_ADMIN was augmented with a check for\nuid\u003d\u003d0 or euid\u003d\u003d0.\n\nThere are several possible ways to look at this:\n\n\t1. uid comparisons are unnecessary, trust CAP_SYS_ADMIN\n\t alone. However CAP_SYS_RESOURCE is the one that really\n\t means \"give me extra resources\" so allow for that as\n\t well.\n\t2. Any privileged code should be protected, but uid is not\n\t an indication of privilege. So we should check whether\n\t any capabilities are raised.\n\t3. uid\u003d\u003d0 makes processes on the host as well as in containers\n\t more important, so we should keep the existing checks.\n\t4. uid\u003d\u003d0 makes processes only on the host more important,\n\t even without any capabilities. So we should be keeping\n\t the (uid\u003d\u003d0||euid\u003d\u003d0) check but only when\n\t userns\u003d\u003d\u0026init_user_ns.\n\nI\u0027m following number 1 here.\n\nSigned-off-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Andrew Morgan \u003cmorgan@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3b7391de67da515c91f48aa371de77cb6cc5c07e", "tree": "22b9f5d9d1c36b374eb5765219aca3c7e1f23486", "parents": [ "46c383cc4530ccc438cb325e92e11eb21dd3d4fc" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Mon Feb 04 22:29:45 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "capabilities: introduce per-process capability bounding set\n\nThe capability bounding set is a set beyond which capabilities cannot grow.\n Currently cap_bset is per-system. It can be manipulated through sysctl,\nbut only init can add capabilities. Root can remove capabilities. By\ndefault it includes all caps except CAP_SETPCAP.\n\nThis patch makes the bounding set per-process when file capabilities are\nenabled. It is inherited at fork from parent. Noone can add elements,\nCAP_SETPCAP is required to remove them.\n\nOne example use of this is to start a safer container. For instance, until\ndevice namespaces or per-container device whitelists are introduced, it is\nbest to take CAP_MKNOD away from a container.\n\nThe bounding set will not affect pP and pE immediately. It will only\naffect pP\u0027 and pE\u0027 after subsequent exec()s. It also does not affect pI,\nand exec() does not constrain pI\u0027. So to really start a shell with no way\nof regain CAP_MKNOD, you would do\n\n\tprctl(PR_CAPBSET_DROP, CAP_MKNOD);\n\tcap_t cap \u003d cap_get_proc();\n\tcap_value_t caparray[1];\n\tcaparray[0] \u003d CAP_MKNOD;\n\tcap_set_flag(cap, CAP_INHERITABLE, 1, caparray, CAP_DROP);\n\tcap_set_proc(cap);\n\tcap_free(cap);\n\nThe following test program will get and set the bounding\nset (but not pI). For instance\n\n\t./bset get\n\t\t(lists capabilities in bset)\n\t./bset drop cap_net_raw\n\t\t(starts shell with new bset)\n\t\t(use capset, setuid binary, or binary with\n\t\tfile capabilities to try to increase caps)\n\n************************************************************\ncap_bound.c\n************************************************************\n #include \u003csys/prctl.h\u003e\n #include \u003clinux/capability.h\u003e\n #include \u003csys/types.h\u003e\n #include \u003cunistd.h\u003e\n #include \u003cstdio.h\u003e\n #include \u003cstdlib.h\u003e\n #include \u003cstring.h\u003e\n\n #ifndef PR_CAPBSET_READ\n #define PR_CAPBSET_READ 23\n #endif\n\n #ifndef PR_CAPBSET_DROP\n #define PR_CAPBSET_DROP 24\n #endif\n\nint usage(char *me)\n{\n\tprintf(\"Usage: %s get\\n\", me);\n\tprintf(\" %s drop \u003ccapability\u003e\\n\", me);\n\treturn 1;\n}\n\n #define numcaps 32\nchar *captable[numcaps] \u003d {\n\t\"cap_chown\",\n\t\"cap_dac_override\",\n\t\"cap_dac_read_search\",\n\t\"cap_fowner\",\n\t\"cap_fsetid\",\n\t\"cap_kill\",\n\t\"cap_setgid\",\n\t\"cap_setuid\",\n\t\"cap_setpcap\",\n\t\"cap_linux_immutable\",\n\t\"cap_net_bind_service\",\n\t\"cap_net_broadcast\",\n\t\"cap_net_admin\",\n\t\"cap_net_raw\",\n\t\"cap_ipc_lock\",\n\t\"cap_ipc_owner\",\n\t\"cap_sys_module\",\n\t\"cap_sys_rawio\",\n\t\"cap_sys_chroot\",\n\t\"cap_sys_ptrace\",\n\t\"cap_sys_pacct\",\n\t\"cap_sys_admin\",\n\t\"cap_sys_boot\",\n\t\"cap_sys_nice\",\n\t\"cap_sys_resource\",\n\t\"cap_sys_time\",\n\t\"cap_sys_tty_config\",\n\t\"cap_mknod\",\n\t\"cap_lease\",\n\t\"cap_audit_write\",\n\t\"cap_audit_control\",\n\t\"cap_setfcap\"\n};\n\nint getbcap(void)\n{\n\tint comma\u003d0;\n\tunsigned long i;\n\tint ret;\n\n\tprintf(\"i know of %d capabilities\\n\", numcaps);\n\tprintf(\"capability bounding set:\");\n\tfor (i\u003d0; i\u003cnumcaps; i++) {\n\t\tret \u003d prctl(PR_CAPBSET_READ, i);\n\t\tif (ret \u003c 0)\n\t\t\tperror(\"prctl\");\n\t\telse if (ret\u003d\u003d1)\n\t\t\tprintf(\"%s%s\", (comma++) ? \", \" : \" \", captable[i]);\n\t}\n\tprintf(\"\\n\");\n\treturn 0;\n}\n\nint capdrop(char *str)\n{\n\tunsigned long i;\n\n\tint found\u003d0;\n\tfor (i\u003d0; i\u003cnumcaps; i++) {\n\t\tif (strcmp(captable[i], str) \u003d\u003d 0) {\n\t\t\tfound\u003d1;\n\t\t\tbreak;\n\t\t}\n\t}\n\tif (!found)\n\t\treturn 1;\n\tif (prctl(PR_CAPBSET_DROP, i)) {\n\t\tperror(\"prctl\");\n\t\treturn 1;\n\t}\n\treturn 0;\n}\n\nint main(int argc, char *argv[])\n{\n\tif (argc\u003c2)\n\t\treturn usage(argv[0]);\n\tif (strcmp(argv[1], \"get\")\u003d\u003d0)\n\t\treturn getbcap();\n\tif (strcmp(argv[1], \"drop\")!\u003d0 || argc\u003c3)\n\t\treturn usage(argv[0]);\n\tif (capdrop(argv[2])) {\n\t\tprintf(\"unknown capability\\n\");\n\t\treturn 1;\n\t}\n\treturn execl(\"/bin/bash\", \"/bin/bash\", NULL);\n}\n************************************************************\n\n[serue@us.ibm.com: fix typo]\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003ea\nSigned-off-by: \"Serge E. Hallyn\" \u003cserue@us.ibm.com\u003e\nTested-by: Jiri Slaby \u003cjirislaby@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "46c383cc4530ccc438cb325e92e11eb21dd3d4fc", "tree": "882b84078780844dffa3fc107adf2a053a25cc7f", "parents": [ "e338d263a76af78fe8f38a72131188b58fceb591" ], "author": { "name": "Andrew Morgan", "email": "andrew@nagrom.org", "time": "Mon Feb 04 22:29:43 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "Remove unnecessary include from include/linux/capability.h\n\nKaiGai Kohei observed that this line in the linux header is not needed.\n\nSigned-off-by: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nCc: KaiGai Kohei \u003ckaigai@kaigai.gr.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e338d263a76af78fe8f38a72131188b58fceb591", "tree": "f3f046fc6fd66de43de7191830f0daf3bc4ec8eb", "parents": [ "8f6936f4d29aa14e54a2470b954a2e1f96322988" ], "author": { "name": "Andrew Morgan", "email": "morgan@kernel.org", "time": "Mon Feb 04 22:29:42 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "Add 64-bit capability support to the kernel\n\nThe patch supports legacy (32-bit) capability userspace, and where possible\ntranslates 32-bit capabilities to/from userspace and the VFS to 64-bit\nkernel space capabilities. If a capability set cannot be compressed into\n32-bits for consumption by user space, the system call fails, with -ERANGE.\n\nFWIW libcap-2.00 supports this change (and earlier capability formats)\n\n http://www.kernel.org/pub/linux/libs/security/linux-privs/kernel-2.6/\n\n[akpm@linux-foundation.org: coding-syle fixes]\n[akpm@linux-foundation.org: use get_task_comm()]\n[ezk@cs.sunysb.edu: build fix]\n[akpm@linux-foundation.org: do not initialise statics to 0 or NULL]\n[akpm@linux-foundation.org: unused var]\n[serue@us.ibm.com: export __cap_ symbols]\nSigned-off-by: Andrew G. Morgan \u003cmorgan@kernel.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nSigned-off-by: Erez Zadok \u003cezk@cs.sunysb.edu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8f6936f4d29aa14e54a2470b954a2e1f96322988", "tree": "63e1bca33b783cf819b356f3ffd45cfe7b226654", "parents": [ "4bea58053f206be9a89ca35850f9ad295dac2042" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Mon Feb 04 22:29:41 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "revert \"capabilities: clean up file capability reading\"\n\nRevert b68680e4731abbd78863063aaa0dca2a6d8cc723 to make way for the next\npatch: \"Add 64-bit capability support to the kernel\".\n\nWe want to keep the vfs_cap_data.data[] structure, using two \u0027data\u0027s for\n64-bit caps (and later three for 96-bit caps), whereas\nb68680e4731abbd78863063aaa0dca2a6d8cc723 had gotten rid of the \u0027data\u0027 struct\nmade its members inline.\n\nThe 64-bit caps patch keeps the stack abuse fix at get_file_caps(), which was\nthe more important part of that patch.\n\n[akpm@linux-foundation.org: coding-style fixes]\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nCc: Andrew Morgan \u003cmorgan@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4bea58053f206be9a89ca35850f9ad295dac2042", "tree": "50df31f6b7e8d38ac0988a523e331babb6462216", "parents": [ "42492594043d621a7910ff5877c3eb9202870b45" ], "author": { "name": "David P. Quigley", "email": "dpquigl@tycho.nsa.gov", "time": "Mon Feb 04 22:29:40 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "VFS: Reorder vfs_getxattr to avoid unnecessary calls to the LSM\n\nOriginally vfs_getxattr would pull the security xattr variable using\nthe inode getxattr handle and then proceed to clobber it with a subsequent call\nto the LSM.\n\nThis patch reorders the two operations such that when the xattr requested is\nin the security namespace it first attempts to grab the value from the LSM\ndirectly.\n\nIf it fails to obtain the value because there is no module present or the\nmodule does not support the operation it will fall back to using the inode\ngetxattr operation.\n\nIn the event that both are inaccessible it returns EOPNOTSUPP.\n\nSigned-off-by: David P. Quigley \u003cdpquigl@tycho.nsa.gov\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "42492594043d621a7910ff5877c3eb9202870b45", "tree": "9188d112c019a189606847dc1d90ccc63c1bacf2", "parents": [ "3729145821e3088a0c3c4183037fde356204bf97" ], "author": { "name": "David P. Quigley", "email": "dpquigl@tycho.nsa.gov", "time": "Mon Feb 04 22:29:39 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:20 2008 -0800" }, "message": "VFS/Security: Rework inode_getsecurity and callers to return resulting buffer\n\nThis patch modifies the interface to inode_getsecurity to have the function\nreturn a buffer containing the security blob and its length via parameters\ninstead of relying on the calling function to give it an appropriately sized\nbuffer.\n\nSecurity blobs obtained with this function should be freed using the\nrelease_secctx LSM hook. This alleviates the problem of the caller having to\nguess a length and preallocate a buffer for this function allowing it to be\nused elsewhere for Labeled NFS.\n\nThe patch also removed the unused err parameter. The conversion is similar to\nthe one performed by Al Viro for the security_getprocattr hook.\n\nSigned-off-by: David P. Quigley \u003cdpquigl@tycho.nsa.gov\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Casey Schaufler \u003ccasey@schaufler-ca.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3729145821e3088a0c3c4183037fde356204bf97", "tree": "d95b23e7b718936e63f7cf46e3b2c26cf3bc9af8", "parents": [ "20cecbae44528d347c46e71f40650b75e0dcbc8e" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:38 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "slob: correct Kconfig description\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "20cecbae44528d347c46e71f40650b75e0dcbc8e", "tree": "fae7206c9aff698b76c5c6aab796539d047947bc", "parents": [ "679299b32dbf9bac4bdaedc850fb95d0f81b4963" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:37 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "slob: reduce external fragmentation by using three free lists\n\nBy putting smaller objects on their own list, we greatly reduce overall\nexternal fragmentation and increase repeatability. This reduces total SLOB\noverhead from \u003e 50% to ~6% on a simple boot test.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "679299b32dbf9bac4bdaedc850fb95d0f81b4963", "tree": "1dc7edbdaf67611958273345b24d271f188371a8", "parents": [ "8bc3be2751b4f74ab90a446da1912fd8204d53f7" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:37 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "slob: fix free block merging at head of subpage\n\nWe weren\u0027t merging freed blocks at the beginning of the free list. Fixing\nthis showed a 2.5% efficiency improvement in a userspace test harness.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8bc3be2751b4f74ab90a446da1912fd8204d53f7", "tree": "2bc514025a906203244d98de70fb6bd87f3ac9ac", "parents": [ "a322f8ab66f50b6c0dcdb59abae84fede7a5fded" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Mon Feb 04 22:29:36 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "writeback: speed up writeback of big dirty files\n\nAfter making dirty a 100M file, the normal behavior is to start the\nwriteback for all data after 30s delays. But sometimes the following\nhappens instead:\n\n\t- after 30s: ~4M\n\t- after 5s: ~4M\n\t- after 5s: all remaining 92M\n\nSome analyze shows that the internal io dispatch queues goes like this:\n\n\t\ts_io s_more_io\n\t\t-------------------------\n\t1)\t100M,1K 0\n\t2)\t1K 96M\n\t3)\t0 96M\n1) initial state with a 100M file and a 1K file\n\n2) 4M written, nr_to_write \u003c\u003d 0, so write more\n\n3) 1K written, nr_to_write \u003e 0, no more writes(BUG)\n\nnr_to_write \u003e 0 in (3) fools the upper layer to think that data have all\nbeen written out. The big dirty file is actually still sitting in\ns_more_io. We cannot simply splice s_more_io back to s_io as soon as s_io\nbecomes empty, and let the loop in generic_sync_sb_inodes() continue: this\nmay starve newly expired inodes in s_dirty. It is also not an option to\ndraw inodes from both s_more_io and s_dirty, an let the loop go on: this\nmight lead to live locks, and might also starve other superblocks in sync\ntime(well kupdate may still starve some superblocks, that\u0027s another bug).\n\nWe have to return when a full scan of s_io completes. So nr_to_write \u003e 0\ndoes not necessarily mean that \"all data are written\". This patch\nintroduces a flag writeback_control.more_io to indicate that more io should\nbe done. With it the big dirty file no longer has to wait for the next\nkupdate invokation 5s later.\n\nIn sync_sb_inodes() we only set more_io on super_blocks we actually\nvisited. This avoids the interaction between two pdflush deamons.\n\nAlso in __sync_single_inode() we don\u0027t blindly keep requeuing the io if the\nfilesystem cannot progress. Failing to do so may lead to 100% iowait.\n\nTested-by: Mike Snitzer \u003csnitzer@gmail.com\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a322f8ab66f50b6c0dcdb59abae84fede7a5fded", "tree": "de492ded59ef0ed1f1705244f51e46628fa26603", "parents": [ "0ed361dec36945f3116ee1338638ada9a8920905" ], "author": { "name": "Sam Ravnborg", "email": "sam@ravnborg.org", "time": "Mon Feb 04 22:29:35 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "mm: fix section mismatch warning in sparse.c\n\nFix following warning:\nWARNING: mm/built-in.o(.text+0x22069): Section mismatch in reference from the function sparse_early_usemap_alloc() to the function .init.text:__alloc_bootmem_node()\n\nstatic sparse_early_usemap_alloc() were used only by sparse_init()\nand with sparse_init() annotated _init it is safe to\nannotate sparse_early_usemap_alloc with __init too.\n\nSigned-off-by: Sam Ravnborg \u003csam@ravnborg.org\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0ed361dec36945f3116ee1338638ada9a8920905", "tree": "3e0fc6319ef49f6cac82e8203a8aa199302ab9c5", "parents": [ "62e1c55300f306e06478f460a7eefba085206e0b" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Feb 04 22:29:34 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "mm: fix PageUptodate data race\n\nAfter running SetPageUptodate, preceeding stores to the page contents to\nactually bring it uptodate may not be ordered with the store to set the\npage uptodate.\n\nTherefore, another CPU which checks PageUptodate is true, then reads the\npage contents can get stale data.\n\nFix this by having an smp_wmb before SetPageUptodate, and smp_rmb after\nPageUptodate.\n\nMany places that test PageUptodate, do so with the page locked, and this\nwould be enough to ensure memory ordering in those places if\nSetPageUptodate were only called while the page is locked. Unfortunately\nthat is not always the case for some filesystems, but it could be an idea\nfor the future.\n\nAlso bring the handling of anonymous page uptodateness in line with that of\nfile backed page management, by marking anon pages as uptodate when they\n_are_ uptodate, rather than when our implementation requires that they be\nmarked as such. Doing allows us to get rid of the smp_wmb\u0027s in the page\ncopying functions, which were especially added for anonymous pages for an\nanalogous memory ordering problem. Both file and anonymous pages are\nhandled with the same barriers.\n\nFAQ:\nQ. Why not do this in flush_dcache_page?\nA. Firstly, flush_dcache_page handles only one side (the smb side) of the\nordering protocol; we\u0027d still need smp_rmb somewhere. Secondly, hiding away\nmemory barriers in a completely unrelated function is nasty; at least in the\nPageUptodate macros, they are located together with (half) the operations\ninvolved in the ordering. Thirdly, the smp_wmb is only required when first\nbringing the page uptodate, wheras flush_dcache_page should be called each time\nit is written to through the kernel mapping. It is logically the wrong place to\nput it.\n\nQ. Why does this increase my text size / reduce my performance / etc.\nA. Because it is adding the necessary instructions to eliminate the data-race.\n\nQ. Can it be improved?\nA. Yes, eg. if you were to create a rule that all SetPageUptodate operations\nrun under the page lock, we could avoid the smp_rmb places where PageUptodate\nis queried under the page lock. Requires audit of all filesystems and at least\nsome would need reworking. That\u0027s great you\u0027re interested, I\u0027m eagerly awaiting\nyour patches.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "62e1c55300f306e06478f460a7eefba085206e0b", "tree": "be15b2e4801c837c5e20d43b8f29a53c0ba1391c", "parents": [ "7786fa9ac5366214fb942a9e62c6e46b4272c22c" ], "author": { "name": "Shaohua Li", "email": "shaohua.li@intel.com", "time": "Mon Feb 04 22:29:33 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "page migraton: handle orphaned pages\n\nOrphaned page might have fs-private metadata, the page is truncated. As\nthe page hasn\u0027t mapping, page migration refuse to migrate the page. It\nappears the page is only freed in page reclaim and if zone watermark is\nlow, the page is never freed, as a result migration always fail. I thought\nwe could free the metadata so such page can be freed in migration and make\nmigration more reliable.\n\n[akpm@linux-foundation.org: go direct to try_to_free_buffers()]\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7786fa9ac5366214fb942a9e62c6e46b4272c22c", "tree": "dafa4440d5607d3481d512b17f2b764a4fefa29d", "parents": [ "b5beb1caff4ce063e6e2dc13f23b80eeef4e9782" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Mon Feb 04 22:29:32 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "Document lowmem_reserve_ratio\n\nThough the lower_zone_protection was changed to lowmem_reserve_ratio, the\ndocument has been not changed. The lowmem_reserve_ratio seems quite hard\nto estimate, but there is no guidance. This patch is to change document\nfor it.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Andrea Arcangeli \u003candrea@cpushare.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b5beb1caff4ce063e6e2dc13f23b80eeef4e9782", "tree": "f3fcf8baafa1e9891edd7f16ffafd768c41c29d6", "parents": [ "e6f3602d2c58815775b2a293cec6650622236169" ], "author": { "name": "Masatake YAMATO", "email": "yamato@redhat.com", "time": "Mon Feb 04 22:29:31 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "check ADVICE of fadvise64_64 even if get_xip_page is given\n\nI\u0027ve written some test programs in ltp project. During writing I met an\nproblem which I cannot solve in user land. So I wrote a patch for linux\nkernel. Please, include this patch if acceptable.\n\nThe test program tests the 4th parameter of fadvise64_64:\n\n long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice);\n\nMy test case calls fadvise64_64 with invalid advice value and checks errno is\nset to EINVAL. About the advice parameter man page says:\n\n ...\n Permissible values for advice include:\n\n\t POSIX_FADV_NORMAL\n ...\n\t POSIX_FADV_SEQUENTIAL\n ...\n\t POSIX_FADV_RANDOM\n\t\t ...\n\t POSIX_FADV_NOREUSE\n ...\n\t POSIX_FADV_WILLNEED\n ...\n\t POSIX_FADV_DONTNEED\n\t\t ...\n ERRORS\n ...\n\t EINVAL An invalid value was specified for advice.\n\nHowever, I got a bug report that the system call invocations\nin my test case returned 0 unexpectedly.\n\nI\u0027ve inspected the kernel code:\n\n asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)\n {\n\t struct file *file \u003d fget(fd);\n\t struct address_space *mapping;\n\t struct backing_dev_info *bdi;\n\t loff_t endbyte;\t\t\t/* inclusive */\n\t pgoff_t start_index;\n\t pgoff_t end_index;\n\t unsigned long nrpages;\n\t int ret \u003d 0;\n\n\t if (!file)\n\t\t return -EBADF;\n\n\t if (S_ISFIFO(file-\u003ef_path.dentry-\u003ed_inode-\u003ei_mode)) {\n\t\t ret \u003d -ESPIPE;\n\t\t goto out;\n\t }\n\n\t mapping \u003d file-\u003ef_mapping;\n\t if (!mapping || len \u003c 0) {\n\t\t ret \u003d -EINVAL;\n\t\t goto out;\n\t }\n\n\t if (mapping-\u003ea_ops-\u003eget_xip_page)\n\t\t /* no bad return value, but ignore advice */\n\t\t goto out;\n ...\n out:\n\t fput(file);\n\t return ret;\n }\n\nI found the advice parameter is just ignored in the case\nmapping-\u003ea_ops-\u003eget_xip_page is given. This behavior is different from\nwhat is written on the man page. Is this o.k.?\n\nget_xip_page is given if CONFIG_EXT2_FS_XIP is true.\nAnyway I cannot find the easy way to detect get_xip_page\nfield is given or CONFIG_EXT2_FS_XIP is true from the\nuser space.\n\nI propose the following patch which checks the advice parameter\neven if get_xip_page is given.\n\nSigned-off-by: Masatake YAMATO \u003cyamato@redhat.com\u003e\nAcked-by: Carsten Otte \u003ccotte@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e6f3602d2c58815775b2a293cec6650622236169", "tree": "84721b0074e745474c7e71f53d58b6211cf30c40", "parents": [ "a2b345642f530054a92b8d2b5108436225a8093e" ], "author": { "name": "Larry Woodman", "email": "lwoodman@redhat.com", "time": "Mon Feb 04 22:29:30 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "Include count of pagecache pages in show_mem() output\n\nThe show_mem() output does not include the total number of pagecache\npages. This would be helpful when analyzing the debug information in\nthe /var/log/messages file after OOM kills occur.\n\nThis patch includes the total pagecache pages in that output.\n\nSigned-off-by: Larry Woodman \u003clwoodman@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a2b345642f530054a92b8d2b5108436225a8093e", "tree": "9be466168baf0fb0c57504e9fe87aec07f09445a", "parents": [ "ae1276b9349a2fd9c3afb4651e25a77ac03299d9" ], "author": { "name": "Bjorn Steinbrink", "email": "B.Steinbrink@gmx.de", "time": "Mon Feb 04 22:29:28 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "Fix dirty page accounting leak with ext3 data\u003djournal\n\nIn 46d2277c796f9f4937bfa668c40b2e3f43e93dd0 (\"Clean up and make\ntry_to_free_buffers() not race with dirty pages\"), try_to_free_buffers\nwas changed to bail out if the page was dirty.\n\nThat in turn caused truncate_complete_page to leak massive amounts of\nmemory, because the dirty bit was only cleared after the call to\ntry_to_free_buffers.\n\nSo the call to cancel_dirty_page was moved up to have the dirty bit\ncleared early in 3e67c0987d7567ad666641164a153dca9a43b11d (\"truncate:\nclear page dirtiness before running try_to_free_buffers()\").\n\nThe problem with that fix is, that the page can be redirtied after\ncancel_dirty_page was called, eg. like this:\n\ntruncate_complete_page()\n cancel_dirty_page() // PG_dirty cleared, decr. dirty pages\n do_invalidatepage()\n ext3_invalidatepage()\n journal_invalidatepage()\n journal_unmap_buffer()\n __dispose_buffer()\n __journal_unfile_buffer()\n __journal_temp_unlink_buffer()\n mark_buffer_dirty(); // PG_dirty set, incr. dirty pages\n\nAnd then we end up with dirty pages being wrongly accounted.\n\nAs a result, in ecdfc9787fe527491baefc22dce8b2dbd5b2908d (\"Resurrect\n\u0027try_to_free_buffers()\u0027 VM hackery\") the changes to try_to_free_buffers\nwere reverted, so the original reason for the massive memory leak is\ngone, and we can also revert the move of the call to cancel_dirty_page\nfrom truncate_complete_page and get the accounting right again.\n\nI\u0027m not sure if it matters, but opposed to the final check in\n__remove_from_page_cache, this one also cares about the task io\naccounting, so maybe we want to use this instead, although it\u0027s not\nquite the clean fix either.\n\nSigned-off-by: Björn Steinbrink \u003cB.Steinbrink@gmx.de\u003e\nTested-by: Krzysztof Piotr Oledzki \u003cole@ans.pl\u003e\nCc: Jan Kara \u003cjack@ucw.cz\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Osterried \u003costerried@jesse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ae1276b9349a2fd9c3afb4651e25a77ac03299d9", "tree": "e3bef5a303f308e398caf53ac098b1d4a2a8061f", "parents": [ "920c7a5d0c94b8ce740f1d76fa06422f2a95a757" ], "author": { "name": "Qi Yong", "email": "qiyong@fc-cn.com", "time": "Mon Feb 04 22:29:27 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "set_page_refcounted() VM_BUG_ON fix\n\nThe current PageTail semantic is that a PageTail page is first a\nPageCompound page. So remove the redundant PageCompound test in\nset_page_refcounted().\n\nSigned-off-by: Qi Yong \u003cqiyong@fc-cn.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "920c7a5d0c94b8ce740f1d76fa06422f2a95a757", "tree": "74ab4b9b5a6f4279b9b9d2a463c6700546ba0011", "parents": [ "1e548deb5d1630ca14ba04da04e3b6b3766178c7" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Mon Feb 04 22:29:26 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "mm: remove fastcall from mm/\n\nfastcall is always defined to be empty, remove it\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1e548deb5d1630ca14ba04da04e3b6b3766178c7", "tree": "0f5f6e1e92e9433014da15185c3dfcb27a200801", "parents": [ "2d544564f9954860235db97df2e549a66c61f557" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Mon Feb 04 22:29:26 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "page allocator: remove unused arguments in zone_init_free_lists()\n\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2d544564f9954860235db97df2e549a66c61f557", "tree": "b539ab01562ae5b92ce365afd32e8fbab74a7e11", "parents": [ "5a9bbdcd29adbb786c53eba1dfc3c2d256020d6b" ], "author": { "name": "Qi Yong", "email": "qiyong@fc-cn.com", "time": "Mon Feb 04 22:29:23 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "skip writing data pages when inode is under I_SYNC\n\nSince I_SYNC was split out from I_LOCK, the concern in commit\n4b89eed93e0fa40a63e3d7b1796ec1337ea7a3aa (\"Write back inode data pages\neven when the inode itself is locked\") is not longer valid.\n\nWe should revert to the original behavior: in __writeback_single_inode(),\nwhen we find an I_SYNC-ed inode and we\u0027re not doing a data-integrity sync,\nskip writing entirely. Otherwise, we are double calling do_writepages()\n\nSigned-off-by: Qi Yong \u003cqiyong@fc-cn.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Joern Engel \u003cjoern@wohnheim.fh-wedel.de\u003e\nCc: WU Fengguang \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Michael Rubin \u003cmrubin@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5a9bbdcd29adbb786c53eba1dfc3c2d256020d6b", "tree": "44fbcff2ad653d7a328bab3144d63da9aaea6f7a", "parents": [ "9eccf2a816ed0aad82b577de6a40cd098ad41944" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:29:23 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "mm: don\u0027t waste swap on locked pages\n\ntry_to_unmap always fails on a page found in a VM_LOCKED vma (unless\nmigrating), and recycles it back to the active list. But if it\u0027s an\nanonymous page, we\u0027ve already allocated swap to it: just wasting swap.\nSpot locked pages in page_referenced_one and treat them as referenced.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nTested-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Ethan Solomita \u003csolo@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9eccf2a816ed0aad82b577de6a40cd098ad41944", "tree": "28d971fbb701d545b54f9f5fdf71c12940d2b8df", "parents": [ "7766755a2f249e7e0dabc5255a0a3d151ff79821" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Feb 04 22:29:22 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "vmstat: remove prefetch\n\nRemove the prefetch logic in order to avoid touching impossible per cpu\nareas.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Mike Travis \u003ctravis@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7766755a2f249e7e0dabc5255a0a3d151ff79821", "tree": "0f9d130d3f8107c77ed61b75f4745dc86e36d457", "parents": [ "195cf453d2c3d789cbe80e3735755f860c2fb222" ], "author": { "name": "Andrea Arcangeli", "email": "andrea@suse.de", "time": "Mon Feb 04 22:29:21 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "Fix /proc dcache deadlock in do_exit\n\nThis patch fixes a sles9 system hang in start_this_handle from a customer\nwith some heavy workload where all tasks are waiting on kjournald to commit\nthe transaction, but kjournald waits on t_updates to go down to zero (it\nnever does).\n\nThis was reported as a lowmem shortage deadlock but when checking the debug\ndata I noticed the VM wasn\u0027t under pressure at all (well it was really\nunder vm pressure, because lots of tasks hanged in the VM prune_dcache\nmethods trying to flush dirty inodes, but no task was hanging in GFP_NOFS\nmode, the holder of the journal handle should have if this was a vm issue\nin the first place).\n\nNo task was apparently holding the leftover handle in the committing\ntransaction, so I deduced t_updates was stuck to 1 because a journal_stop\nwas never run by some path (this turned out to be correct). With a debug\npatch adding proper reverse links and stack trace logging in ext3 deployed\nin production, I found journal_stop is never run because\nmark_inode_dirty_sync is called inside release_task called by do_exit.\n(that was quite fun because I would have never thought about this\nsubtleness, I thought a regular path in ext3 had a bug and it forgot to\ncall journal_stop)\n\ndo_exit-\u003erelease_task-\u003emark_inode_dirty_sync-\u003eschedule() (will never\ncome back to run journal_stop)\n\nThe reason is that shrink_dcache_parent is racy by design (feature not\na bug) and it can do blocking I/O in some case, but the point is that\ncalling shrink_dcache_parent at the last stage of do_exit isn\u0027t safe\nfor self-reaping tasks.\n\nI guess the memory pressure of the unbalanced highmem system allowed\nto trigger this more easily.\n\nNow mainline doesn\u0027t have this line in iput (like sles9 has):\n\n \t if (inode-\u003ei_state \u0026 I_DIRTY_DELAYED)\n\t \t\t\tmark_inode_dirty_sync(inode);\n\nso it will probably not crash with ext3, but for example ext2 implements an\nI/O-blocking ext2_put_inode that will lead to similar screwups with\next2_free_blocks never coming back and it\u0027s definitely wrong to call\nblocking-IO paths inside do_exit. So this should fix a subtle bug in\nmainline too (not verified in practice though). The equivalent fix for\next3 is also not verified yet to fix the problem in sles9 but I don\u0027t have\ndoubt it will (it usually takes days to crash, so it\u0027ll take weeks to be\nsure).\n\nAn alternate fix would be to offload that work to a kernel thread, but I\ndon\u0027t think a reschedule for this is worth it, the vm should be able to\ncollect those entries for the synchronous release_task.\n\nSigned-off-by: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Jan Kara \u003cjack@ucw.cz\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "195cf453d2c3d789cbe80e3735755f860c2fb222", "tree": "fad48a8167744b6c091c8ca499bc78b859af8957", "parents": [ "3dfa5721f12c3d5a441448086bee156887daa961" ], "author": { "name": "Bron Gondwana", "email": "brong@fastmail.fm", "time": "Mon Feb 04 22:29:20 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "mm/page-writeback: highmem_is_dirtyable option\n\nAdd vm.highmem_is_dirtyable toggle\n\nA 32 bit machine with HIGHMEM64 enabled running DCC has an MMAPed file of\napproximately 2Gb size which contains a hash format that is written\nrandomly by the dbclean process. On 2.6.16 this process took a few\nminutes. With lowmem only accounting of dirty ratios, this takes about 12\nhours of 100% disk IO, all random writes.\n\nInclude a toggle in /proc/sys/vm/highmem_is_dirtyable which can be set to 1 to\nadd the highmem back to the total available memory count.\n\n[akpm@linux-foundation.org: Fix the CONFIG_DETECT_SOFTLOCKUP\u003dy build]\nSigned-off-by: Bron Gondwana \u003cbrong@fastmail.fm\u003e\nCc: Ethan Solomita \u003csolo@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: WU Fengguang \u003cwfg@mail.ustc.edu.cn\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3dfa5721f12c3d5a441448086bee156887daa961", "tree": "8ace8c3f842f8b626b762bb9d2a9b24d8e3bd130", "parents": [ "5dc331852848a38ca00a2817e5b98a1d0561b116" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Feb 04 22:29:19 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "Page allocator: get rid of the list of cold pages\n\nWe have repeatedly discussed if the cold pages still have a point. There is\none way to join the two lists: Use a single list and put the cold pages at the\nend and the hot pages at the beginning. That way a single list can serve for\nboth types of allocations.\n\nThe discussion of the RFC for this and Mel\u0027s measurements indicate that\nthere may not be too much of a point left to having separate lists for\nhot and cold pages (see http://marc.info/?t\u003d119492914200001\u0026r\u003d1\u0026w\u003d2).\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Martin Bligh \u003cmbligh@mbligh.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5dc331852848a38ca00a2817e5b98a1d0561b116", "tree": "c306874d0194ecf88c2073a042e6f932e710f67f", "parents": [ "a7f75e25860ac0a7b70cf6e14c37618d2d2bb890" ], "author": { "name": "Robert Bragg", "email": "robert@sixbynine.org", "time": "Mon Feb 04 22:29:18 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "mm: don\u0027t allow ioremapping of ranges larger than vmalloc space\n\nWhen running with a 16M IOREMAP_MAX_ORDER (on armv7) we found that the\nvmlist search routine in __get_vm_area_node can mistakenly allow a driver\nto ioremap a range larger than vmalloc space.\n\nIf at the time of the ioremap all existing vmlist areas sit below the\ndetermined alignment then the search routine continues past all entries and\nexits the for loop - straight into the found: label - without ever testing\nfor integer wrapping or that the requested size fits.\n\nWe were seeing a driver successfully ioremap 128M of flash even though\nthere was only 120M of vmalloc space. From that point the system was left\nwith the remainder of the first 16M of space to vmalloc/ioremap within.\n\nSigned-off-by: Robert Bragg \u003crobert@sixbynine.org\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a7f75e25860ac0a7b70cf6e14c37618d2d2bb890", "tree": "12f651d69e72159c6f904e007973874e912853bb", "parents": [ "08e7d9b557299ba6ce57165ce8df310780bd681c" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Feb 04 22:29:16 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "vmstat: small revisions to refresh_cpu_vm_stats()\n\n1. Add comments explaining how the function can be called.\n\n2. Collect global diffs in a local array and only spill\n them once into the global counters when the zone scan\n is finished. This means that we only touch each global\n counter once instead of each time we fold cpu counters\n into zone counters.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "08e7d9b557299ba6ce57165ce8df310780bd681c", "tree": "8733b402eaa1de1a6bcdea5ee72ea8655c896dd4", "parents": [ "5e5419734c8719cbc01af959ad9c0844002c0df5" ], "author": { "name": "Martin Schwidefsky", "email": "schwidefsky@de.ibm.com", "time": "Mon Feb 04 22:29:16 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "arch_rebalance_pgtables call\n\nIn order to change the layout of the page tables after an mmap has crossed the\nadress space limit of the current page table layout a architecture hook in\nget_unmapped_area is needed. The arguments are the address of the new mapping\nand the length of it.\n\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5e5419734c8719cbc01af959ad9c0844002c0df5", "tree": "a075dca3f719946689efa0245464855cbf2a20ce", "parents": [ "9f8f2172537de7af0b0fbd33502d18d52b1339bc" ], "author": { "name": "Benjamin Herrenschmidt", "email": "benh@kernel.crashing.org", "time": "Mon Feb 04 22:29:14 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:18 2008 -0800" }, "message": "add mm argument to pte/pmd/pud/pgd_free\n\n(with Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e)\n\nThe pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as\nfirst argument. The free functions do not get the mm_struct argument. This\nis 1) asymmetrical and 2) to do mm related page table allocations the mm\nargument is needed on the free function as well.\n\n[kamalesh@linux.vnet.ibm.com: i386 fix]\n[akpm@linux-foundation.org: coding-syle fixes]\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nSigned-off-by: Kamalesh Babulal \u003ckamalesh@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9f8f2172537de7af0b0fbd33502d18d52b1339bc", "tree": "273c86583ed0295059c5526d3bd6927520a20add", "parents": [ "e2848a0efedef4dad52d1334d37f8719cd6268fd" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Feb 04 22:29:11 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "Page allocator: clean up pcp draining functions\n\n- Add comments explaing how drain_pages() works.\n\n- Eliminate useless functions\n\n- Rename drain_all_local_pages to drain_all_pages(). It does drain\n all pages not only those of the local processor.\n\n- Eliminate useless interrupt off / on sequences. drain_pages()\n disables interrupts on its own. The execution thread is\n pinned to processor by the caller. So there is no need to\n disable interrupts.\n\n- Put drain_all_pages() declaration in gfp.h and remove the\n declarations from suspend.h and from mm/memory_hotplug.c\n\n- Make software suspend call drain_all_pages(). The draining\n of processor local pages is may not the right approach if\n software suspend wants to support SMP. If they call drain_all_pages\n then we can make drain_pages() static.\n\n[akpm@linux-foundation.org: fix build]\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nCc: Daniel Walker \u003cdwalker@mvista.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e2848a0efedef4dad52d1334d37f8719cd6268fd", "tree": "f5d2b600b1275793e7c490f34ae9ec902af138b5", "parents": [ "e31d9eb5c17ae3b80f9e9403f8a5eaf6dba879c9" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Feb 04 22:29:10 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "radix-tree: avoid atomic allocations for preloaded insertions\n\nMost pagecache (and some other) radix tree insertions have the great\nopportunity to preallocate a few nodes with relaxed gfp flags. But the\npreallocation is squandered when it comes time to allocate a node, we\ndefault to first attempting a GFP_ATOMIC allocation -- that doesn\u0027t\nnormally fail, but it can eat into atomic memory reserves that we don\u0027t\nneed to be using.\n\nAnother upshot of this is that it removes the sometimes highly contended\nzone-\u003elock from underneath tree_lock. Pagecache insertions are always\nperformed with a radix tree preload, and after this change, such a\nsituation will never fall back to kmem_cache_alloc within\nradix_tree_node_alloc.\n\nDavid Miller reports seeing this allocation fail on a highly threaded\nsparc64 system:\n\n[527319.459981] dd: page allocation failure. order:0, mode:0x20\n[527319.460403] Call Trace:\n[527319.460568] [00000000004b71e0] __slab_alloc+0x1b0/0x6a8\n[527319.460636] [00000000004b7bbc] kmem_cache_alloc+0x4c/0xa8\n[527319.460698] [000000000055309c] radix_tree_node_alloc+0x20/0x90\n[527319.460763] [0000000000553238] radix_tree_insert+0x12c/0x260\n[527319.460830] [0000000000495cd0] add_to_page_cache+0x38/0xb0\n[527319.460893] [00000000004e4794] mpage_readpages+0x6c/0x134\n[527319.460955] [000000000049c7fc] __do_page_cache_readahead+0x170/0x280\n[527319.461028] [000000000049cc88] ondemand_readahead+0x208/0x214\n[527319.461094] [0000000000496018] do_generic_mapping_read+0xe8/0x428\n[527319.461152] [0000000000497948] generic_file_aio_read+0x108/0x170\n[527319.461217] [00000000004badac] do_sync_read+0x88/0xd0\n[527319.461292] [00000000004bb5cc] vfs_read+0x78/0x10c\n[527319.461361] [00000000004bb920] sys_read+0x34/0x60\n[527319.461424] [0000000000406294] linux_sparc_syscall32+0x3c/0x40\n\nThe calltrace is significant: __do_page_cache_readahead allocates a number\nof pages with GFP_KERNEL, and hence it should have reclaimed sufficient\nmemory to satisfy GFP_ATOMIC allocations. However after the list of pages\ngoes to mpage_readpages, there can be significant intervals (including disk\nIO) before all the pages are inserted into the radix-tree. So the reserves\ncan easily be depleted at that point. The patch is confirmed to fix the\nproblem.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e31d9eb5c17ae3b80f9e9403f8a5eaf6dba879c9", "tree": "8cd63d594e618938d14a77169792ddee3995edf4", "parents": [ "625d9573d0f905146efd15169a35ea9c5a841198" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:29:09 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "make __vmalloc_area_node() static\n\n__vmalloc_area_node() can become static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "625d9573d0f905146efd15169a35ea9c5a841198", "tree": "40d5f49b9613b3ec41d0a6a182b766433bce5a7f", "parents": [ "f61eaf9fc58f3b2d9e3ad424496620f3381ccd1e" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Mon Feb 04 22:29:08 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "Remove unused code from mm/tiny-shmem.c\n\nThis code in mm/tiny-shmem.c is under #if 0 - remove it.\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f61eaf9fc58f3b2d9e3ad424496620f3381ccd1e", "tree": "cc81b75fbdc13589ac0defb0b6f018d066e1c21d", "parents": [ "1e88328111aae3ea408f346763ba9f9bad71f876" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Feb 04 22:29:08 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "mm/page-writeback.c: make a function static\n\ntask_dirty_limit() can become static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1e88328111aae3ea408f346763ba9f9bad71f876", "tree": "22be92057a7426ca5b6c8ee9b136bbc417c902a8", "parents": [ "304daa8132a95e998b6716d4b7bd8bd76aa152b2" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:07 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "maps4: make page monitoring /proc file optional\n\nMake /proc/ page monitoring configurable\n\nThis puts the following files under an embedded config option:\n\n/proc/pid/clear_refs\n/proc/pid/smaps\n/proc/pid/pagemap\n/proc/kpagecount\n/proc/kpageflags\n\n[akpm@linux-foundation.org: Kconfig fix]\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "304daa8132a95e998b6716d4b7bd8bd76aa152b2", "tree": "21f37f8eb40518b3300b5c0967cf3867c7f18aae", "parents": [ "161f47bf41c5ece90ac53cbb6a4cb9bf74ce0ef6" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:06 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "maps4: add /proc/kpageflags interface\n\nThis makes a subset of physical page flags available to userspace. Together\nwith /proc/pid/kpagemap, this allows tracking of a wide variety of VM behaviors.\n\nExported flags are decoupled from the kernel\u0027s internal flags. This\nallows us to reorder flag bits, and synthesize any bits that get\nredefined in terms of other bits.\n\n[akpm@linux-foundation.org: remove unneeded access_ok()]\n[akpm@linux-foundation.org: s/0/NULL/]\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "161f47bf41c5ece90ac53cbb6a4cb9bf74ce0ef6", "tree": "f6f18c3eb74faf8b2b8de27b42241e9986bd6dc9", "parents": [ "85863e475e59afb027b0113290e3796ee6020b7d" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:05 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:17 2008 -0800" }, "message": "maps4: add /proc/kpagecount interface\n\nThis makes physical page map counts available to userspace. Together\nwith /proc/pid/pagemap and /proc/pid/clear_refs, this can be used to\nmonitor memory usage on a per-page basis.\n\n[akpm@linux-foundation.org: remove unneeded access_ok()]\n[bunk@stusta.de: make struct proc_kpagemap static]\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "85863e475e59afb027b0113290e3796ee6020b7d", "tree": "047cc687b98c0261bd3c083f17c090fbf082355f", "parents": [ "a6198797cc3fd659b2d81cdf6bb6b9bba9cd93e9" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:04 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: add /proc/pid/pagemap interface\n\nThis interface provides a mapping for each page in an address space to its\nphysical page frame number, allowing precise determination of what pages are\nmapped and what pages are shared between processes.\n\nNew in this version:\n\n- headers gone again (as recommended by Dave Hansen and Alan Cox)\n- 64-bit entries (as per discussion with Andi Kleen)\n- swap pte information exported (from Dave Hansen)\n- page walker callback for holes (from Dave Hansen)\n- direct put_user I/O (as suggested by Rusty Russell)\n\nThis patch folds in cleanups and swap PTE support from Dave Hansen\n\u003chaveblue@us.ibm.com\u003e.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a6198797cc3fd659b2d81cdf6bb6b9bba9cd93e9", "tree": "da256154b9c764067aadd2738d9083d38a6f1882", "parents": [ "f248dcb34d7b7ac255db70071a20be9d9c6ad491" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:03 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: regroup task_mmu by interface\n\nReorder source so that all the code and data for each interface is together.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f248dcb34d7b7ac255db70071a20be9d9c6ad491", "tree": "ec7c7fb115e40b4a337af98a6f9f2ad5db9af1f0", "parents": [ "4752c369789250eafcd7813e11c8fb689235b0d2" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:03 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: move clear_refs code to task_mmu.c\n\nThis puts all the clear_refs code where it belongs and probably lets things\ncompile on MMU-less systems as well.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4752c369789250eafcd7813e11c8fb689235b0d2", "tree": "24fda864f4962f18fd8e118271f1d8c4ec633024", "parents": [ "b3ae5acbbb98d95c1300c8ced56d15f97d09c506" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:02 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: simplify interdependence of maps and smaps\n\nThis pulls the shared map display code out of show_map and puts it in\nshow_smap where it belongs.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b3ae5acbbb98d95c1300c8ced56d15f97d09c506", "tree": "e8a159c7c3309564458f7dea955b6a9daf948b61", "parents": [ "e6473092bd9116583ce9ab8cf1b6570e1aa6fc83" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:01 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: use pagewalker in clear_refs and smaps\n\nUse the generic pagewalker for smaps and clear_refs\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e6473092bd9116583ce9ab8cf1b6570e1aa6fc83", "tree": "e91a7ca6ce89f24a4a2d500d748dabf727c61887", "parents": [ "698dd4ba6b12e34e1e432c944c01478c0b2cd773" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:01 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: introduce a generic page walker\n\nIntroduce a general page table walker\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "698dd4ba6b12e34e1e432c944c01478c0b2cd773", "tree": "fe524e3ae12b54968b363314ad45841abbd55d98", "parents": [ "824552574162ac00ae636fa41386b1072379ea4a" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Mon Feb 04 22:29:00 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: move is_swap_pte\n\nMove is_swap_pte helper function to swapops.h for use by pagemap code\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "824552574162ac00ae636fa41386b1072379ea4a", "tree": "85c595275c6007115ad002c56dbb7eb51ab67064", "parents": [ "ec4dd3eb35759f9fbeb5c1abb01403b2fde64cc9" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Mon Feb 04 22:28:59 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: rework TASK_SIZE macros\n\nThe following replaces the earlier patches sent. It should address\nDavid Rientjes\u0027s comments, and has been compile tested on all the\narchitectures that it touches, save for parisc.\n\nFor the /proc/\u003cpid\u003e/pagemap code[1], we need to able to query how\nmuch virtual address space a particular task has. The trick is\nthat we do it through /proc and can\u0027t use TASK_SIZE since it\nreferences \"current\" on some arches. The process opening the\n/proc file might be a 32-bit process opening a 64-bit process\u0027s\npagemap file.\n\nx86_64 already has a TASK_SIZE_OF() macro:\n\n#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)\n\nI\u0027d like to have that for other architectures. So, add it\nfor all the architectures that actually use \"current\" in\ntheir TASK_SIZE. For the others, just add a quick #define\nin sched.h to use plain old TASK_SIZE.\n\n1. http://www.linuxworld.com/news/2007/042407-kernel.html\n\n- MIPS portion from Ralf Baechle \u003cralf@linux-mips.org\u003e\n\n[akpm@linux-foundation.org: fix mips build]\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Ralf Baechle \u003cralf@linux-mips.org\u003e\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ec4dd3eb35759f9fbeb5c1abb01403b2fde64cc9", "tree": "0eaf4d91180556df61da6300463d946390ce55fb", "parents": [ "61d5048f149572434daee0cce5e1374a8a7cf3e8" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Mon Feb 04 22:28:56 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "maps4: add proportional set size accounting in smaps\n\nThe \"proportional set size\" (PSS) of a process is the count of pages it has\nin memory, where each page is divided by the number of processes sharing\nit. So if a process has 1000 pages all to itself, and 1000 shared with one\nother process, its PSS will be 1500.\n\n - lwn.net: \"ELC: How much memory are applications really using?\"\n\nThe PSS proposed by Matt Mackall is a very nice metic for measuring an\nprocess\u0027s memory footprint. So collect and export it via\n/proc/\u003cpid\u003e/smaps.\n\nMatt Mackall\u0027s pagemap/kpagemap and John Berthels\u0027s exmap can also do the\njob. They are comprehensive tools. But for PSS, let\u0027s do it in the simple\nway.\n\nCc: John Berthels \u003cjjberthels@gmail.com\u003e\nCc: Bernardo Innocenti \u003cbernie@codewiz.org\u003e\nCc: Padraig Brady \u003cP@draigBrady.com\u003e\nCc: Denys Vlasenko \u003cvda.linux@googlemail.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "61d5048f149572434daee0cce5e1374a8a7cf3e8", "tree": "97ac9c25bc44a58145a750a99887195df31cbe40", "parents": [ "1b1b32f2c6f6bb32535d2da62075b51c980880eb" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Mon Feb 04 22:28:56 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "clean up vmtruncate\n\nvmtruncate is a twisted maze of gotos, this patch cleans it up to have a\nproper if else for the two major cases of extending and truncating truncate\nand thus makes it a lot more readable while keeping exactly the same\nfunctinality.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1b1b32f2c6f6bb32535d2da62075b51c980880eb", "tree": "686aac685a4c04f085dc17cc1a05910149a04933", "parents": [ "b409f9fcf04692c0f603d28c73d2e3dfed27bf54" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:55 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:16 2008 -0800" }, "message": "tmpfs: fix shmem_swaplist races\n\nIntensive swapoff testing shows shmem_unuse spinning on an entry in\nshmem_swaplist pointing to itself: how does that come about? Days pass...\n\nFirst guess is this: shmem_delete_inode tests list_empty without taking the\nglobal mutex (so the swapping case doesn\u0027t slow down the common case); but\nthere\u0027s an instant in shmem_unuse_inode\u0027s list_move_tail when the list entry\nmay appear empty (a rare case, because it\u0027s actually moving the head not the\nthe list member). So there\u0027s a danger of leaving the inode on the swaplist\nwhen it\u0027s freed, then reinitialized to point to itself when reused. Fix that\nby skipping the list_move_tail when it\u0027s a no-op, which happens to plug this.\n\nBut this same spinning then surfaces on another machine. Ah, I\u0027d never\nsuspected it, but shmem_writepage\u0027s swaplist manipulation is unsafe: though we\nstill hold page lock, which would hold off inode deletion if the page were in\npagecache, it doesn\u0027t hold off once it\u0027s in swapcache (free_swap_and_cache\ndoesn\u0027t wait on locked pages). Hmm: we could put the the inode on swaplist\nearlier, but then shmem_unuse_inode could never prune unswapped inodes.\n\nFix this with an igrab before dropping info-\u003elock, as in shmem_unuse_inode;\nthough I am a little uneasy about the iput which has to follow - it works, and\nI see nothing wrong with it, but it is surprising that shmem inode deletion\nmay now occur below shmem_writepage. Revisit this fix later?\n\nAnd while we\u0027re looking at these races: the way shmem_unuse tests swapped\nwithout holding info-\u003elock looks unsafe, if we\u0027ve more than one swap area: a\nracing shmem_writepage on another page of the same inode could be putting it\nin swapcache, just as we\u0027re deciding to remove the inode from swaplist -\nthere\u0027s a danger of going on swap without being listed, so a later swapoff\nwould hang, being unable to locate the entry. Move that test and removal down\ninto shmem_unuse_inode, once info-\u003elock is held.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b409f9fcf04692c0f603d28c73d2e3dfed27bf54", "tree": "de287c277045c72c485867a52b37f4e7d0c5815a", "parents": [ "2e0e26c76a35de8f8bec6b2b917518cfeb52888a" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:54 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: radix_tree_preloading\n\nNick has observed that shmem.c still uses GFP_ATOMIC when adding to page cache\nor swap cache, without any radix tree preload: so tending to deplete emergency\nreserves of memory.\n\nGFP_ATOMIC remains appropriate in shmem_writepage\u0027s add_to_swap_cache: it\u0027s\nbeing called under memory pressure, so must not wait for more memory to become\navailable. But shmem_unuse_inode now has a window in which it can and should\npreload with GFP_KERNEL, and say GFP_NOWAIT instead of GFP_ATOMIC in its\nadd_to_page_cache.\n\nshmem_getpage is not so straightforward: its filepage/swappage integrity\nrelies upon exchanging between caches under spinlock, and it would need a lot\nof restructuring to place the preloads correctly. Instead, follow its pattern\nof retrying on races: use GFP_NOWAIT instead of GFP_ATOMIC in\nadd_to_page_cache, and begin each circuit of the repeat loop with a sleeping\nradix_tree_preload, followed immediately by radix_tree_preload_end - that\nwon\u0027t guarantee success in the next add_to_page_cache, but doesn\u0027t need to.\n\nAnd we can then remove that bothersome congestion_wait: when needed, it\u0027ll\nautomatically get done in the course of the radix_tree_preload.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nLooks-good-to: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2e0e26c76a35de8f8bec6b2b917518cfeb52888a", "tree": "1357781bfe035c2401c65b2d0203385a47516bf5", "parents": [ "cb5f7b9a47963d9238398cd0c2676473e3c6896d" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:53 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: open a window in shmem_unuse_inode\n\nThere are a couple of reasons (patches follow) why it would be good to open a\nwindow for sleep in shmem_unuse_inode, between its search for a matching swap\nentry, and its handling of the entry found.\n\nshmem_unuse_inode must then use igrab to hold the inode against deletion in\nthat window, and its corresponding iput might result in deletion: so it had\nbetter unlock_page before the iput, and might as well release the page too.\n\nNor is there any need to hold on to shmem_swaplist_mutex once we know we\u0027ll\nleave the loop. So this unwinding moves from try_to_unuse and shmem_unuse\ninto shmem_unuse_inode, in the case when it finds a match.\n\nLet try_to_unuse break on error in the shmem_unuse case, as it does in the\nunuse_mm case: though at this point in the series, no error to break on.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cb5f7b9a47963d9238398cd0c2676473e3c6896d", "tree": "bc2eed3d7c2c3787f50030c7c493c4295eaf673c", "parents": [ "a0ee5ec520ede1dc8e2194623bcebfd9fab408f2" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:52 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: make shmem_unuse more preemptible\n\nshmem_unuse is at present an unbroken search through every swap vector page of\nevery tmpfs file which might be swapped, all under shmem_swaplist_lock. This\ndates from long ago, when the caller held mmlist_lock over it all too: long\ngone, but there\u0027s never been much pressure for preemptible swapoff.\n\nMake it a little more preemptible, replacing shmem_swaplist_lock by\nshmem_swaplist_mutex, inserting a cond_resched in the main loop, and a\ncond_resched_lock (on info-\u003elock) at one convenient point in the\nshmem_unuse_inode loop, where it has no outstanding kmap_atomic.\n\nIf we\u0027re serious about preemptible swapoff, there\u0027s much further to go e.g.\nI\u0027m stupid to let the kmap_atomics of the decreasingly significant HIGHMEM\ncase dictate preemptiblility for other configs. But as in the earlier patch\nto make swapoff scan ptes preemptibly, my hidden agenda is really towards\nmaking memcgroups work, hardly about preemptibility at all.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a0ee5ec520ede1dc8e2194623bcebfd9fab408f2", "tree": "74a3668798213661a9e62a1b576f081f1ce44838", "parents": [ "d9fe526a83b84edc9c5ff217a00c896bfc20b2ce" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:51 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: allocate on read when stacked\n\ntmpfs is expected to limit the memory used (unless mounted with nr_blocks\u003d0 or\nsize\u003d0). But if a stacked filesystem such as unionfs gets pages from a sparse\ntmpfs file by reading holes, and then writes to them, it can easily exceed any\nsuch limit at present.\n\nSo suppress the SGP_READ \"don\u0027t allocate page\" ZERO_PAGE optimization when\nreading for the kernel (a KERNEL_DS check, ugh, sorry about that). Indeed,\npessimistically mark such pages as dirty, so they cannot get reclaimed and\nunaccounted by mistake. The venerable shmem_recalc_inode code (originally to\naccount for the reclaim of clean pages) suffices to get the accounting right\nwhen swappages are dropped in favour of more uptodate filepages.\n\nThis also fixes the NULL shmem_swp_entry BUG or oops in shmem_writepage,\ncaused by unionfs writing to a very sparse tmpfs file: to minimize memory\nallocation in swapout, tmpfs requires the swap vector be allocated upfront,\nwhich wasn\u0027t always happening in this stacked case.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d9fe526a83b84edc9c5ff217a00c896bfc20b2ce", "tree": "aecb9dbd92108915ba255df8f04d106c2099bf48", "parents": [ "73b1262fa43a778b1e154deea632cdef5009d6a1" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:51 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: allow filepage alongside swappage\n\ntmpfs has long allowed for a fresh filepage to be created in pagecache, just\nbefore shmem_getpage gets the chance to match it up with the swappage which\nalready belongs to that offset. But unionfs_writepage now does a\nfind_or_create_page, divorced from shmem_getpage, which leaves conflicting\nfilepage and swappage outstanding indefinitely, when unionfs is over tmpfs.\n\nTherefore shmem_writepage (where a page is swizzled from file to swap) must\nnow be on the lookout for existing swap, ready to free it in favour of the\nmore uptodate filepage, instead of BUGging on that clash. And when the\nadd_to_page_cache fails in shmem_unuse_inode, it must defer to an uptodate\nfilepage, otherwise swapoff would hang. Whereas when add_to_page_cache fails\nin shmem_getpage, it should retry in the same way it already does.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "73b1262fa43a778b1e154deea632cdef5009d6a1", "tree": "409f14e78e23cd999e8c3d1e0945f0fa9b67048f", "parents": [ "f000944d03a5b74ab3c92b2fcdf0e944cc898065" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:50 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: move swap swizzling into shmem\n\nmove_to_swap_cache and move_from_swap_cache functions (which swizzle a page\nbetween tmpfs page cache and swap cache, to avoid page copying) are only used\nby shmem.c; and our subsequent fix for unionfs needs different treatments in\nthe two instances of move_from_swap_cache. Move them from swap_state.c into\ntheir callsites shmem_writepage, shmem_unuse_inode and shmem_getpage, making\nadd_to_swap_cache externally visible.\n\nshmem.c likes to say set_page_dirty where swap_state.c liked to say\nSetPageDirty: respect that diversity, which __set_page_dirty_no_writeback\nmakes moot (and implies we should lose that \"shift page from clean_pages to\ndirty_pages list\" comment: it\u0027s on neither).\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f000944d03a5b74ab3c92b2fcdf0e944cc898065", "tree": "07b64eeed416f3869a3fc4f06d00bd1fb1321f20", "parents": [ "bb63be0a091c512fb566ee235eb8320d5831b6e2" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:49 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: shuffle add_to_swap_caches\n\nadd_to_swap_cache doesn\u0027t amount to much: merge it into its sole caller\nread_swap_cache_async. But we\u0027ll be needing to call __add_to_swap_cache from\nshmem.c, so promote it to the new add_to_swap_cache. Both were static, so\nthere\u0027s no interface confusion to worry about.\n\nAnd lose that inappropriate \"Anon pages are already on the LRU\" comment in the\nmerging: they\u0027re not already on the LRU, as Nick Piggin noticed.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nNo-problems-with: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bb63be0a091c512fb566ee235eb8320d5831b6e2", "tree": "3fc58d190902417429228c3066b6093a848c5974", "parents": [ "818db35992c249dc32c1d86daf7d533fb0952f5d" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:49 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: move swap_state stats update\n\nBoth unionfs and memcgroups pose challenges to tmpfs and shmem. To help fix,\nit\u0027s best to move the swap swizzling functions from swap_state.c to shmem.c.\nAs a preliminary to that, move swap stats updating down into\n__add_to_swap_cache, which will remain internal to swap_state.c.\n\nWell, actually, just move down the incrementation of add_total: remove\nnoent_race and exist_race completely, they are relics of my 2.4.11 testing.\nAlt-SysRq-m users will be thrilled if 2.6.25 is at last free of \"race M+N\"s.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "818db35992c249dc32c1d86daf7d533fb0952f5d", "tree": "8577fe7cff367eade84f632621b16054c362d39a", "parents": [ "5b04c6890f0dc7ea6c85b9adebc883c55c667d97" ], "author": { "name": "Michael Marineau", "email": "mike@marineau.org", "time": "Mon Feb 04 22:28:48 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: fix mounts when size is less than the page size\n\nWhen tmpfs is mounted with a size less than one page, the number of blocks\nis set to 0 which makes the tmpfs mount unlimited. This can lead to a\nquick and surprising death if someone typos a tmpfs mount command and\nwrites too much.\n\ntmpfs can still be mounted as unlimited if size or nr_blocks is exactly 0,\nas Documentation/filesystems/tmpfs.txt says.\n\nHugh: do this by rounding size up instead of down in all cases: which\nslightly expands other odd-sized tmpfs mounts, but in a consistent way.\n\nSigned-off-by: Michael Marineau \u003cmike@marineau.org\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5b04c6890f0dc7ea6c85b9adebc883c55c667d97", "tree": "50f060de1edcd5cda14290f13bad0e74433b0a67", "parents": [ "2e441889c38fe1b6ef6b963e6993076aa120176c" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Mon Feb 04 22:28:47 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "shmem: factor out sbi-\u003efree_inodes manipulations\n\nThe shmem_sb_info structure has a number of free_inodes. This\nvalue is altered in appropriate places under spinlock and with\nthe sbi-\u003emax_inodes !\u003d 0 check.\n\nConsolidate these manipulations into two helpers.\n\nThis is minus 42 bytes of shmem.o and minus 4 :) lines of code.\n\n[akpm@linux-foundation.org: fix error return values]\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2e441889c38fe1b6ef6b963e6993076aa120176c", "tree": "f8cc99d2b8a3b90c6ff2c3e6d14e90d7edd95d7e", "parents": [ "8952898b0d25223f38daf46b86156fd1c4d17ad0" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:46 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "swapoff: scan ptes preemptibly\n\nProvided that CONFIG_HIGHPTE is not set, unuse_pte_range can reduce latency\nin swapoff by scanning the page table preemptibly: so long as unuse_pte is\ncareful to recheck that entry under pte lock.\n\n(To tell the truth, this patch was not inspired by any cries for lower\nlatency here: rather, this restructuring permits a future memory controller\npatch to allocate with GFP_KERNEL in unuse_pte, where before it could not.\nBut it would be wrong to tuck this change away inside a memcgroup patch.)\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nTested-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8952898b0d25223f38daf46b86156fd1c4d17ad0", "tree": "10912460cd9d42195d4aba8250ed1c3bd3577bb4", "parents": [ "5402b976ae0be96b3a32f3508ab7308c380d6477" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:45 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "swapin: fix valid_swaphandles defect\n\nvalid_swaphandles is supposed to do a quick pass over the swap map entries\nneigbouring the entry which swapin_readahead is targetting, to determine for\nit a range worth reading all together. But since it always starts its search\nfrom the beginning of the swap \"cluster\", a reject (free entry) there\nimmediately curtails the readaround, and every swapin_readahead from that\ncluster is for just a single page. Instead scan forwards and backwards around\nthe target entry.\n\nUse better names for some variables: a swap_info pointer is usually called\n\"si\" not \"swapdev\". And at the end, if only the target page should be read,\nreturn count of 0 to disable readaround, to avoid the unnecessarily repeated\ncall to read_swap_cache_async.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-by: Rik van Riel \u003criel@surriel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ], "next": "5402b976ae0be96b3a32f3508ab7308c380d6477" }