)]}' { "log": [ { "commit": "a866374aecc90c7d90619727ccd851ac096b2fc7", "tree": "eabae0b36b5281dcef20563470c7f05549689b8c", "parents": [ "6edaf68a87d17570790fd55f0c451a29ec1d6703" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Dec 06 20:32:20 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:21 2006 -0800" }, "message": "[PATCH] mm: pagefault_{disable,enable}()\n\nIntroduce pagefault_{disable,enable}() and use these where previously we did\nmanual preempt increments/decrements to make the pagefault handler do the\natomic thing.\n\nCurrently they still rely on the increased preempt count, but do not rely on\nthe disabled preemption, this might go away in the future.\n\n(NOTE: the extra barrier() in pagefault_disable might fix some holes on\n machines which have too many registers for their own good)\n\n[heiko.carstens@de.ibm.com: s390 fix]\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1b79e5513d52e8533a08af35a3595dad80c74d1f", "tree": "01d69b3e5e9fca89fc44b462bfe24cb06243ac0f", "parents": [ "aafe6c2a2b6bce5a3a4913ce5c07e85ea143144d" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Wed Sep 27 01:51:14 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Sep 27 08:26:20 2006 -0700" }, "message": "[PATCH] add probe_kernel_address()\n\nAdd a version of __get_user() which is safe to call inside mmap_sem.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c22ce143d15eb288543fe9873e1c5ac1c01b69a1", "tree": "dc7d457b8952fc50dfc90df659b35de4117c61fc", "parents": [ "7dbdf43cfa635ddc3701cc8d1eab07597cd731c0" ], "author": { "name": "Hiro Yoshioka", "email": "hyoshiok@miraclelinux.com", "time": "Fri Jun 23 02:04:16 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jun 23 07:42:56 2006 -0700" }, "message": "[PATCH] x86: cache pollution aware __copy_from_user_ll()\n\nUse the x86 cache-bypassing copy instructions for copy_from_user().\n\nSome performance data are\n\nTotal of GLOBAL_POWER_EVENTS (CPU cycle samples)\n\n2.6.12.4.orig 1921587\n2.6.12.4.nt 1599424\n1599424/1921587\u003d83.23% (16.77% reduction)\n\nBSQ_CACHE_REFERENCE (L3 cache miss)\n2.6.12.4.orig 57427\n2.6.12.4.nt 20858\n20858/57427\u003d36.32% (63.7% reduction)\n\nL3 cache miss reduction of __copy_from_user_ll\nsamples %\n37408 65.1412 vmlinux __copy_from_user_ll\n23 0.1103 vmlinux __copy_user_zeroing_intel_nocache\n23/37408\u003d0.061% (99.94% reduction)\n\nTop 5 of 2.6.12.4.nt\nCounted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000\nsamples % app name symbol name\n128392 8.0274 vmlinux __copy_user_zeroing_intel_nocache\n64206 4.0143 vmlinux journal_add_journal_head\n59746 3.7355 vmlinux do_get_write_access\n47674 2.9807 vmlinux journal_put_journal_head\n46021 2.8774 vmlinux journal_dirty_metadata\npattern9-0-cpu4-0-09011728/summary.out\n\nCounted BSQ_CACHE_REFERENCE events (cache references seen by the bus unit) with a unit mask of 0x3f (multiple flags) count 3000\nsamples % app name symbol name\n69755 4.2861 vmlinux __copy_user_zeroing_intel_nocache\n55685 3.4215 vmlinux journal_add_journal_head\n52371 3.2179 vmlinux __find_get_block\n45504 2.7960 vmlinux journal_put_journal_head\n36005 2.2123 vmlinux journal_stop\npattern9-0-cpu4-0-09011744/summary.out\n\nCounted BSQ_CACHE_REFERENCE events (cache references seen by the bus unit) with a unit mask of 0x200 (read 3rd level cache miss) count 3000\nsamples % app name symbol name\n1147 5.4994 vmlinux journal_add_journal_head\n881 4.2240 vmlinux journal_dirty_data\n872 4.1809 vmlinux blk_rq_map_sg\n734 3.5192 vmlinux journal_commit_transaction\n617 2.9582 vmlinux radix_tree_delete\npattern9-0-cpu4-0-09011731/summary.out\n\niozone results are\n\noriginal 2.6.12.4 CPU time \u003d 207.768 sec\ncache aware CPU time \u003d 184.783 sec\n(three times run)\n184.783/207.768\u003d88.94% (11.06% reduction)\n\noriginal:\npattern9-0-cpu4-0-08191720/iozone.out: CPU Utilization: Wall time 45.997 CPU time 64.527 CPU utilization 140.28 %\npattern9-0-cpu4-0-08191741/iozone.out: CPU Utilization: Wall time 46.878 CPU time 71.933 CPU utilization 153.45 %\npattern9-0-cpu4-0-08191743/iozone.out: CPU Utilization: Wall time 45.152 CPU time 71.308 CPU utilization 157.93 %\n\ncache awre:\npattern9-0-cpu4-0-09011728/iozone.out: CPU Utilization: Wall time 44.842 CPU time 62.465 CPU utilization 139.30 %\npattern9-0-cpu4-0-09011731/iozone.out: CPU Utilization: Wall time 44.718 CPU time 59.273 CPU utilization 132.55 %\npattern9-0-cpu4-0-09011744/iozone.out: CPU Utilization: Wall time 44.367 CPU time 63.045 CPU utilization 142.10 %\n\nSigned-off-by: Hiro Yoshioka \u003chyoshiok@miraclelinux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" } ] }