)]}' { "log": [ { "commit": "3e347261a80b57df792ab9464b5f0ed59add53a8", "tree": "047b35e0f9ec82b3beeff882a9af6292a500097c", "parents": [ "802f192e4a600f7ef84ca25c8b818c8830acef5a" ], "author": { "name": "Bob Picco", "email": "bob.picco@hp.com", "time": "Sat Sep 03 15:54:28 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:38 2005 -0700" }, "message": "[PATCH] sparsemem extreme implementation\n\nWith cleanups from Dave Hansen \u003chaveblue@us.ibm.com\u003e\n\nSPARSEMEM_EXTREME makes mem_section a one dimensional array of pointers to\nmem_sections. This two level layout scheme is able to achieve smaller\nmemory requirements for SPARSEMEM with the tradeoff of an additional shift\nand load when fetching the memory section. The current SPARSEMEM\nimplementation is a one dimensional array of mem_sections which is the\ndefault SPARSEMEM configuration. The patch attempts isolates the\nimplementation details of the physical layout of the sparsemem section\narray.\n\nSPARSEMEM_EXTREME requires bootmem to be functioning at the time of\nmemory_present() calls. This is not always feasible, so architectures\nwhich do not need it may allocate everything statically by using\nSPARSEMEM_STATIC.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Bob Picco \u003cbob.picco@hp.com\u003e\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "802f192e4a600f7ef84ca25c8b818c8830acef5a", "tree": "51e9a6ed164e6a2d8741af510c3954ad79bf19af", "parents": [ "0216f86dafb389c0ad97529fd45e64e883298cfd" ], "author": { "name": "Bob Picco", "email": "bob.picco@hp.com", "time": "Sat Sep 03 15:54:26 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:38 2005 -0700" }, "message": "[PATCH] SPARSEMEM EXTREME\n\nA new option for SPARSEMEM is ARCH_SPARSEMEM_EXTREME. Architecture\nplatforms with a very sparse physical address space would likely want to\nselect this option. For those architecture platforms that don\u0027t select the\noption, the code generated is equivalent to SPARSEMEM currently in -mm.\nI\u0027ll be posting a patch on ia64 ml which uses this new SPARSEMEM feature.\n\nARCH_SPARSEMEM_EXTREME makes mem_section a one dimensional array of\npointers to mem_sections. This two level layout scheme is able to achieve\nsmaller memory requirements for SPARSEMEM with the tradeoff of an\nadditional shift and load when fetching the memory section. The current\nSPARSEMEM -mm implementation is a one dimensional array of mem_sections\nwhich is the default SPARSEMEM configuration. The patch attempts isolates\nthe implementation details of the physical layout of the sparsemem section\narray.\n\nARCH_SPARSEMEM_EXTREME depends on 64BIT and is by default boolean false.\n\nI\u0027ve boot tested under aim load ia64 configured for ARCH_SPARSEMEM_EXTREME.\n I\u0027ve also boot tested a 4 way Opteron machine with !ARCH_SPARSEMEM_EXTREME\nand tested with aim.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Bob Picco \u003cbob.picco@hp.com\u003e\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "d41dee369bff3b9dcb6328d4d822926c28cc2594", "tree": "a0405f3b7af3ebca21838a7d427bd75a067bf850", "parents": [ "af705362ab6018071310c5fcd436a6b457517d5f" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Jun 23 00:07:54 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:04 2005 -0700" }, "message": "[PATCH] sparsemem memory model\n\nSparsemem abstracts the use of discontiguous mem_maps[]. This kind of\nmem_map[] is needed by discontiguous memory machines (like in the old\nCONFIG_DISCONTIGMEM case) as well as memory hotplug systems. Sparsemem\nreplaces DISCONTIGMEM when enabled, and it is hoped that it can eventually\nbecome a complete replacement.\n\nA significant advantage over DISCONTIGMEM is that it\u0027s completely separated\nfrom CONFIG_NUMA. When producing this patch, it became apparent in that NUMA\nand DISCONTIG are often confused.\n\nAnother advantage is that sparse doesn\u0027t require each NUMA node\u0027s ranges to be\ncontiguous. It can handle overlapping ranges between nodes with no problems,\nwhere DISCONTIGMEM currently throws away that memory.\n\nSparsemem uses an array to provide different pfn_to_page() translations for\neach SECTION_SIZE area of physical memory. This is what allows the mem_map[]\nto be chopped up.\n\nIn order to do quick pfn_to_page() operations, the section number of the page\nis encoded in page-\u003eflags. Part of the sparsemem infrastructure enables\nsharing of these bits more dynamically (at compile-time) between the\npage_zone() and sparsemem operations. However, on 32-bit architectures, the\nnumber of bits is quite limited, and may require growing the size of the\npage-\u003eflags type in certain conditions. Several things might force this to\noccur: a decrease in the SECTION_SIZE (if you want to hotplug smaller areas of\nmemory), an increase in the physical address space, or an increase in the\nnumber of used page-\u003eflags.\n\nOne thing to note is that, once sparsemem is present, the NUMA node\ninformation no longer needs to be stored in the page-\u003eflags. It might provide\nspeed increases on certain platforms and will be stored there if there is\nroom. But, if out of room, an alternate (theoretically slower) mechanism is\nused.\n\nThis patch introduces CONFIG_FLATMEM. It is used in almost all cases where\nthere used to be an #ifndef DISCONTIG, because SPARSEMEM and DISCONTIGMEM\noften have to compile out the same areas of code.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Martin Bligh \u003cmbligh@aracnet.com\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Bob Picco \u003cbob.picco@hp.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "af705362ab6018071310c5fcd436a6b457517d5f", "tree": "429e505558ee98e19b08ade8d02eedc3fee2478b", "parents": [ "b159d43fbf7eaaac6ecc647f51cf4257332db47b" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Jun 23 00:07:53 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:04 2005 -0700" }, "message": "[PATCH] generify memory present\n\nAllow architectures to indicate that they will be providing hooks to indice\ninstalled memory areas, memory_present(). Provide prototypes for the i386\nimplementation.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Martin Bligh \u003cmbligh@aracnet.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "785dcd44b60ec8ede76fed0af54333ab5f3e848c", "tree": "d928787cd93c608f24a6366d0990cd962a5a0c16", "parents": [ "e1785e85b9c81c67b581b511ee4efac6c81e9edb" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:50 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:03 2005 -0700" }, "message": "[PATCH] mm/Kconfig: give DISCONTIG more help text\n\nThis gives DISCONTIGMEM a bit more help text to explain what it does, not just\nwhen to choose it.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "e1785e85b9c81c67b581b511ee4efac6c81e9edb", "tree": "97d0470fec528f9c995674abd39c02c36ec2d110", "parents": [ "074ccf8016b61f4b40066f8d737ab31e17a6afd1" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:49 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:03 2005 -0700" }, "message": "[PATCH] mm/Kconfig: hide \"Memory Model\" selection menu\n\nI got some feedback from users who think that the new \"Memory Model\" menu is a\nlittle invasive. This patch will hide that menu, except when\nCONFIG_EXPERIMENTAL is enabled *or* when an individual architecture wants it.\n\nAn individual arch may want to enable it because they\u0027ve removed their\narch-specific DISCONTIG prompt in favor of the mm/Kconfig one.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "44d0f805c77902a22dda244fd092b4567066b2b9", "tree": "62732a526b6ade8b9cc0f403130ddf4d4b4fdf46", "parents": [ "93b7504e3e6c1d98586854806e51bea329ea3aa9" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:47 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:03 2005 -0700" }, "message": "[PATCH] sparsemem: fix minor \"defaults\" issue in mm/Kconfig\n\nThe following patch applies on top of 2.6.12-rc2-mm1. It fixes a minor\nuser interaction issue, and an early reference to SPARSEMEM.\n\nThis \"choice\" menu would always default to FLATMEM, as it was listed first.\n Move it to the end so that the other defaults have a chance first.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "93b7504e3e6c1d98586854806e51bea329ea3aa9", "tree": "7b0d6f3a6214960daf3136f8c418178405521c07", "parents": [ "0e19243e9a19ef8e5994852671bd06bb51630811" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:47 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:03 2005 -0700" }, "message": "[PATCH] Introduce new Kconfig option for NUMA or DISCONTIG\n\nThere is some confusion that arose when working on SPARSEMEM patch between\nwhat is needed for DISCONTIG vs. NUMA.\n\nMultiple pg_data_t\u0027s are needed for DISCONTIGMEM or NUMA, independently.\nAll of the current NUMA implementations require an implementation of\nDISCONTIG. Because of this, quite a lot of code which is really needed for\nNUMA is actually under DISCONTIG #ifdefs. For SPARSEMEM, we changed some\nof these #ifdefs to CONFIG_NUMA, but that broke the DISCONTIG\u003dy and NUMA\u003dn\ncase.\n\nIntroducing this new NEED_MULTIPLE_NODES config option allows code that is\nneeded for both NUMA or DISCONTIG to be separated out from code that is\nspecific to DISCONTIG.\n\nOne great advantage of this approach is that it doesn\u0027t require every\narchitecture to be converted over. All of the current implementations\nshould \"just work\", only the ones implementing SPARSEMEM will have to be\nfixed up.\n\nThe change to free_area_init() makes it work inside, or out of the new\nconfig option.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3a9da7655d2d5b7f790a370328cf093440c80496", "tree": "29fd39ee7dce0cfb4abc104a8492c22ff7f06111", "parents": [ "5b505b90b2d54e526cc8d123bdef3b98c9f0bbc6" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:42 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:01 2005 -0700" }, "message": "[PATCH] create mm/Kconfig for arch-independent memory options\n\nWith sparsemem being introduced, we need a central place for new\nmemory-related .config options: mm/Kconfig. This allows us to remove many\nof the duplicated arch-specific options.\n\nThe new option, CONFIG_FLATMEM, is there to enable us to detangle NUMA and\nDISCONTIGMEM. This is a requirement for sparsemem because sparsemem uses\nthe NUMA code without the presence of DISCONTIGMEM. The sparsemem patches\nuse CONFIG_FLATMEM in generic code, so this patch is a requirement before\napplying them.\n\nAlmost all places that used to do \u0027#ifndef CONFIG_DISCONTIGMEM\u0027 should use\n\u0027#ifdef CONFIG_FLATMEM\u0027 instead.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" } ] }