)]}' { "log": [ { "commit": "f3fe65122da05e1cd4c9140340d96ea2f95d0c49", "tree": "65f2bcdb0a9665123b5083d3aea7dae483593cbc", "parents": [ "80bfed904c690642db9d4178950735299160950b" ], "author": { "name": "Con Kolivas", "email": "kernel@kolivas.org", "time": "Fri Jan 06 00:11:15 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:28 2006 -0800" }, "message": "[PATCH] mm: add populated_zone() helper\n\nThere are numerous places we check whether a zone is populated or not.\n\nProvide a helper function to check for populated zones and convert all\nchecks for zone-\u003epresent_pages.\n\nSigned-off-by: Con Kolivas \u003ckernel@kolivas.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9328b8faae922e52073785ed6c1eaa8565648a0e", "tree": "065034bc534a4997197d26acf1774725159e4e65", "parents": [ "7756b9e4e321c3c83c7aa5b9532d3e7fd7ddeb4a" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Fri Jan 06 00:11:10 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:26 2006 -0800" }, "message": "[PATCH] mm: dma32 zone statistics\n\nAdd dma32 to zone statistics. Also attempt to arrange struct page_state a\nbit better (visually).\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Andi Kleen \u003cak@muc.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2d92c5c9150a2a9ca3dc25da58d5042e17a96b6a", "tree": "7a559b29019f2391095f958d9546a4453839ec43", "parents": [ "13e7444b0ec59f96d81a4e8c379d5f38fc5f2cc1" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Fri Jan 06 00:10:59 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:25 2006 -0800" }, "message": "[PATCH] mm: remove pcp low\n\nstruct per_cpu_pages.low is useless. Remove it.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "161599ff39a3c3cdea0a1be05ac53accd2c45cdd", "tree": "9943c93c97dcf042f5ec7c5fab011be655d8212a", "parents": [ "2bdaf115b1c364d89484b59d5b937973f1c5a5c3" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Fri Jan 06 00:10:54 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:24 2006 -0800" }, "message": "[PATCH] sparsemem: provide pfn_to_nid\n\nBefore SPARSEMEM is initialised we cannot provide an efficient pfn_to_nid()\nimplmentation; before initialisation is complete we use early_pfn_to_nid()\nto provide location information. Until recently there was no non-init user\nof this functionality. Provide a post init pfn_to_nid() implementation.\n\nNote that this implmentation assumes that the pfn passed has been validated\nwith pfn_valid(). The current single user of this function already has\nthis check.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2bdaf115b1c364d89484b59d5b937973f1c5a5c3", "tree": "184d595f1969e5488da6c78f8387f239e8d49cac", "parents": [ "03b00ebcc804180829d513df9e92e5fe8f72aacf" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Fri Jan 06 00:10:53 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:24 2006 -0800" }, "message": "[PATCH] flatmem split out memory model\n\nThere are three places we define pfn_to_nid(). Two in linux/mmzone.h and one\nin asm/mmzone.h. These in essence represent the three memory models. The\ndefinition in linux/mmzone.h under !NEED_MULTIPLE_NODES is both the FLATMEM\ndefinition and the optimisation for single NUMA nodes; the one under SPARSEMEM\nis the NUMA sparsemem one; the one in asm/mmzone.h under DISCONTIGMEM is the\ndiscontigmem one. This is not in the least bit obvious, particularly the\nconnection between the non-NUMA optimisations and the memory models.\n\nTwo patches:\n\nflatmem-split-out-memory-model: simplifies the selection of pfn_to_nid()\nimplementations. The selection is based primarily off the memory model\nselected. Optimisations for non-NUMA are applied where needed.\n\nsparse-provide-pfn_to_nid: implement pfn_to_nid() for SPARSEMEM\n\nThis patch:\n\npfn_to_nid is memory model specific\n\nThe pfn_to_nid() call is memory model specific. It represents the locality\nidentifier for the memory passed. Classically this would be a NUMA node,\nbut not a chunk of memory under DISCONTIGMEM.\n\nThe SPARSEMEM and FLATMEM memory model non-NUMA versions of pfn_to_nid()\nare folded together under NEED_MULTIPLE_NODES, while DISCONTIGMEM has its\nown optimisation. This is all very confusing.\n\nThis patch splits out each implementation of pfn_to_nid() so that we can\nsee them and the optimisations to each.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a94b3ab7eab4edcc9b2cb474b188f774c331adf7", "tree": "96636969fa4a9e0b79c98f81cbcd726c5d3834a5", "parents": [ "d5afa6dcf74c0efb60ce07c63d0a727be93c67c5" ], "author": { "name": "Mike Kravetz", "email": "kravetz@us.ibm.com", "time": "Fri Jan 06 00:10:51 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:24 2006 -0800" }, "message": "[PATCH] mm: remove arch independent NODES_SPAN_OTHER_NODES\n\nThe NODES_SPAN_OTHER_NODES config option was created so that DISCONTIGMEM\ncould handle pSeries numa layouts. However, support for DISCONTIGMEM has\nbeen replaced by SPARSEMEM on powerpc. As a result, this config option and\nsupporting code is no longer needed.\n\nI have already sent a patch to Paul that removes the option from powerpc\nspecific code. This removes the arch independent piece. Doesn\u0027t really\nmatter which is applied first.\n\nSigned-off-by: Mike Kravetz \u003ckravetz@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "d5afa6dcf74c0efb60ce07c63d0a727be93c67c5", "tree": "5cc602e4c3c6ebbf0d8879676b67c237f3abb026", "parents": [ "9f3fd602aef96c2a490e3bfd669d06475aeba8d8" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Fri Jan 06 00:10:50 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:24 2006 -0800" }, "message": "[PATCH] mm: pfn_to_pgdat not used in common code\n\npfn_to_pgdat() isn\u0027t used in common code. Remove definition.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9f3fd602aef96c2a490e3bfd669d06475aeba8d8", "tree": "3f16d0d4ff7cbb8943c37391a0ea5fa9e3424dbb", "parents": [ "6bda666a03f063968833760c5bb5c13062ab9291" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Fri Jan 06 00:10:50 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:23 2006 -0800" }, "message": "[PATCH] mm: kvaddr_to_nid not used in common code\n\nkvaddr_to_nid() isn\u0027t used in common code nor in i386 code. Remove these\ndefinitions.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ac3461ad632e86e7debd871776683c05ef3ba4c6", "tree": "98ea9272b3e9d05499f1a4fbf10e998f6d476fa5", "parents": [ "4b4a27dff4e2d4cc2eac1cde31aede834a966a48" ], "author": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Nov 22 19:39:30 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Nov 22 19:39:30 2005 -0800" }, "message": "Fix up GFP_ZONEMASK for GFP_DMA32 usage\n\nThere was some confusion about the different zone usage, this should fix\nup the resulting mess in the GFP zonemask handling.\n\nThe different zone usage is still confusing (it\u0027s very easy to mix up\nthe individual zone numbers with the GFP zone _list_ numbers), so we\nmight want to clean up some of this in the future, but in the meantime\nthis should fix the actual problems.\n\nAcked-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4060994c3e337b40e0f6fa8ce2cc178e021baf3d", "tree": "980297c1747ca89354bc879cc5d17903eacb19e2", "parents": [ "0174f72f848dfe7dc7488799776303c81b181b16", "d3ee871e63d0a0c70413dc0aa5534b8d6cd6ec37" ], "author": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 14 19:56:02 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 14 19:56:02 2005 -0800" }, "message": "Merge x86-64 update from Andi\n" }, { "commit": "69d81fcde7797342417591ba7affb372b9c86eae", "tree": "97fbc73fd20f8ebc313b2bc41367a8efe36c2c3d", "parents": [ "50895c5d76e15d8af480eff1aaab5770cabbc2c2" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Sat Nov 05 17:25:53 2005 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 14 19:55:14 2005 -0800" }, "message": "[PATCH] x86_64: Speed up numa_node_id by putting it directly into the PDA\n\nNot go from the CPU number to an mapping array.\nMode number is often used now in fast paths.\n\nThis also adds a generic numa_node_id to all the topology includes\n\nSuggested by Eric Dumazet\n\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "07808b74e7dab1aa385e698795875337d72daf7d", "tree": "3b593c31e6e58364f4001105bfeebefa94708209", "parents": [ "1dff7f3db5f045ccbfeca5bb00b0958a78501557" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Sat Nov 05 17:25:53 2005 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 14 19:55:14 2005 -0800" }, "message": "[PATCH] x86_64: Remove obsolete ARCH_HAS_ATOMIC_UNSIGNED and page_flags_t\n\nHas been introduced for x86-64 at some point to save memory\nin struct page, but has been obsolete for some time. Just\nremove it.\n\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a2f1b424900715ed9d1699c3bb88a434a2b42bc0", "tree": "8ef440f840656365166ff2d71aa445c224c53546", "parents": [ "56720367cd89ef5265f39da2d674c5b92cd4cd87" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Sat Nov 05 17:25:53 2005 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 14 19:55:13 2005 -0800" }, "message": "[PATCH] x86_64: Add 4GB DMA32 zone\n\nAdd a new 4GB GFP_DMA32 zone between the GFP_DMA and GFP_NORMAL zones.\n\nAs a bit of historical background: when the x86-64 port\nwas originally designed we had some discussion if we should\nuse a 16MB DMA zone like i386 or a 4GB DMA zone like IA64 or\nboth. Both was ruled out at this point because it was in early\n2.4 when VM is still quite shakey and had bad troubles even\ndealing with one DMA zone. We settled on the 16MB DMA zone mainly\nbecause we worried about older soundcards and the floppy.\n\nBut this has always caused problems since then because\ndevice drivers had trouble getting enough DMA able memory. These days\nthe VM works much better and the wide use of NUMA has proven\nit can deal with many zones successfully.\n\nSo this patch adds both zones.\n\nThis helps drivers who need a lot of memory below 4GB because\ntheir hardware is not accessing more (graphic drivers - proprietary\nand free ones, video frame buffer drivers, sound drivers etc.).\nPreviously they could only use IOMMU+16MB GFP_DMA, which\nwas not enough memory.\n\nAnother common problem is that hardware who has full memory\naddressing for \u003e4GB misses it for some control structures in memory\n(like transmit rings or other metadata). They tended to allocate memory\nin the 16MB GFP_DMA or the IOMMU/swiotlb then using pci_alloc_consistent,\nbut that can tie up a lot of precious 16MB GFPDMA/IOMMU/swiotlb memory\n(even on AMD systems the IOMMU tends to be quite small) especially if you have\nmany devices. With the new zone pci_alloc_consistent can just put\nthis stuff into memory below 4GB which works better.\n\nOne argument was still if the zone should be 4GB or 2GB. The main\nmotivation for 2GB would be an unnamed not so unpopular hardware\nraid controller (mostly found in older machines from a particular four letter\ncompany) who has a strange 2GB restriction in firmware. But\nthat one works ok with swiotlb/IOMMU anyways, so it doesn\u0027t really\nneed GFP_DMA32. I chose 4GB to be compatible with IA64 and because\nit seems to be the most common restriction.\n\nThe new zone is so far added only for x86-64.\n\nFor other architectures who don\u0027t set up this\nnew zone nothing changes. Architectures can set a compatibility\ndefine in Kconfig CONFIG_DMA_IS_DMA32 that will define GFP_DMA32\nas GFP_DMA. Otherwise it\u0027s a nop because on 32bit architectures\nit\u0027s normally not needed because GFP_NORMAL (\u003d0) is DMA able\nenough.\n\nOne problem is still that GFP_DMA means different things on different\narchitectures. e.g. some drivers used to have #ifdef ia64 use GFP_DMA\n(trusting it to be 4GB) #elif __x86_64__ (use other hacks like\nthe swiotlb because 16MB is not enough) ... . This was quite\nugly and is now obsolete.\n\nThese should be now converted to use GFP_DMA32 unconditionally. I haven\u0027t done\nthis yet. Or best only use pci_alloc_consistent/dma_alloc_coherent\nwhich will use GFP_DMA32 transparently.\n\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "7fb1d9fca5c6e3b06773b69165a73f3fb786b8ee", "tree": "21f8b7deeb8a7e1197edfccc610365a12d60322e", "parents": [ "51c6f666fceb3184eeff045dad4432b602cd648e" ], "author": { "name": "Rohit Seth", "email": "rohit.seth@intel.com", "time": "Sun Nov 13 16:06:43 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Nov 13 18:14:12 2005 -0800" }, "message": "[PATCH] mm: __alloc_pages cleanup\n\nClean up of __alloc_pages.\n\nRestoration of previous behaviour, plus further cleanups by introducing an\n\u0027alloc_flags\u0027, removing the last of should_reclaim_zone.\n\nSigned-off-by: Rohit Seth \u003crohit.seth@intel.com\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "bdc8cb984576ab5b550c8b24c6fa111a873503e3", "tree": "f94548988874caa10d770e6e65bc50c925abf825", "parents": [ "208d54e5513c0c02d85af0990901354c74364d5c" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Sat Oct 29 18:16:53 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:44 2005 -0700" }, "message": "[PATCH] memory hotplug locking: zone span seqlock\n\nSee the \"fixup bad_range()\" patch for more information, but this actually\ncreates a the lock to protect things making assumptions about a zone\u0027s size\nstaying constant at runtime.\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": "208d54e5513c0c02d85af0990901354c74364d5c", "tree": "83922f1d4a83f19bffcbff299044f421bd7e9c73", "parents": [ "c6a57e19e464db118dc4ab9cfe9e9748c6d630a0" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Sat Oct 29 18:16:52 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:44 2005 -0700" }, "message": "[PATCH] memory hotplug locking: node_size_lock\n\npgdat-\u003enode_size_lock is basically only neeeded in one place in the normal\ncode: show_mem(), which is the arch-specific sysrq-m printing function.\n\nStrictly speaking, the architectures not doing memory hotplug do no need this\nlocking in show_mem(). However, they are all included for completeness. This\nshould also make any future consolidation of all of the implementations a\nlittle more straightforward.\n\nThis lock is also held in the sparsemem code during a memory removal, as\nsections are invalidated. This is the place there pfn_valid() is made false\nfor a memory area that\u0027s being removed. The lock is only required when doing\npfn_valid() operations on memory which the user does not already have a\nreference on the page, such as in show_mem().\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": "4ca644d970bf2542623228a4624af356d20ca267", "tree": "1040782e8799d5531a5ee1d5f1143e26e8781e9d", "parents": [ "ed8ece2ec8d3c2031b1a1a0737568bb0d49454e0" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Sat Oct 29 18:16:51 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:44 2005 -0700" }, "message": "[PATCH] memory hotplug prep: __section_nr helper\n\nA little helper that we use in the hotplug code.\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": "260b23674fdb570f3235ce55892246bef1c24c2a", "tree": "471e7b546cbf1f7ee4a165e5bd9a2de0770e53be", "parents": [ "c4cdd038318863e912e9b992489f61497f98b442" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 21 03:22:44 2005 -0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Oct 28 08:16:51 2005 -0700" }, "message": "[PATCH] gfp_t: the rest\n\nzone handling, mapping-\u003eflags handling\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "28ae55c98e4d16eac9a05a8a259d7763ef3aeb18", "tree": "0ac0a08d88a692b9b9934344b5e439058d71772a", "parents": [ "3e347261a80b57df792ab9464b5f0ed59add53a8" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Sat Sep 03 15:54:29 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:38 2005 -0700" }, "message": "[PATCH] sparsemem extreme: hotplug preparation\n\nThis splits up sparse_index_alloc() into two pieces. This is needed\nbecause we\u0027ll allocate the memory for the second level in a different place\nfrom where we actually consume it to keep the allocation from happening\nunderneath a lock\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Bob Picco \u003cbob.picco@hp.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "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": "29751f6991e845f7d002a6ae520bf996b38c8dcd", "tree": "f76c4c660ac4d204436f68851979343d2a9ba224", "parents": [ "641c767389b19859a45e6de46d8e18cd935bdb60" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Jun 23 00:08:00 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:05 2005 -0700" }, "message": "[PATCH] sparsemem hotplug base\n\nMake sparse\u0027s initalization be accessible at runtime. This allows sparse\nmappings to be created after boot in a hotplug situation.\n\nThis patch is separated from the previous one just to give an indication how\nmuch of the sparse infrastructure is *just* for hotplug memory.\n\nThe section_mem_map doesn\u0027t really store a pointer. It stores something that\nis convenient to do some math against to get a pointer. It isn\u0027t valid to\njust do *section_mem_map, so I don\u0027t think it should be stored as a pointer.\n\nThere are a couple of things I\u0027d like to store about a section. First of all,\nthe fact that it is !NULL does not mean that it is present. There could be\nsuch a combination where section_mem_map *is* NULL, but the math gets you\nproperly to a real mem_map. So, I don\u0027t think that check is safe.\n\nSince we\u0027re storing 32-bit-aligned structures, we have a few bits in the\nbottom of the pointer to play with. Use one bit to encode whether there\u0027s\nreally a mem_map there, and the other one to tell whether there\u0027s a valid\nsection there. We need to distinguish between the two because sometimes\nthere\u0027s a gap between when a section is discovered to be present and when we\ncan get the mem_map for it.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Jack Steiner \u003csteiner@sgi.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": "641c767389b19859a45e6de46d8e18cd935bdb60", "tree": "b3ac95aaea213823c226b181b8a301e4ae95bd9d", "parents": [ "05b79bdcb48c18cd9b580c39e3efb9a1ab078151" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Jun 23 00:07:59 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:05 2005 -0700" }, "message": "[PATCH] sparsemem swiss cheese numa layouts\n\nThe part of the sparsemem patch which modifies memmap_init_zone() has recently\nbecome a problem. It changes behavior so that there is a call to\npfn_to_page() for each individual page inside of a node\u0027s range:\nnode_start_pfn through node_end_pfn. It used to simply do this once, at the\nbeginning of the node, but having sparsemem\u0027s non-contiguous mem_map[]s inside\nof a node made it necessary to change.\n\nMike Kravetz recently wrote a patch which made the NUMA code accept some new\nkinds of layouts. The system\u0027s memory was laid out like this, with node 0\u0027s\nmemory in two pieces: one before and one after node 1\u0027s memory:\n\n\tNode 0: +++++ +++++\n\tNode 1: +++++\n\nPrevious behavior before Mike\u0027s patch was to assign nodes like this:\n\n\tNode 0: 00000 XXXXX\n\tNode 1: 11111\n\nWhere the \u0027X\u0027 areas were simply thrown away. The new behavior was to make the\npg_data_t span node 0 across all of its areas, including areas that are really\nnode 1\u0027s: Node 0: 000000000000000 Node 1: 11111\n\nThis wastes a little bit of mem_map space, but ends up being OK, and more\nfully utilizes the system\u0027s memory. memmap_init_zone() initializes all of the\n\"struct page\"s for node 0, even for the \"hole\", but those never get used,\nbecause there is no pfn_to_page() that resolves to those pages. However, only\ncalling pfn_to_page() once, memmap_init_zone() always uses the pages that were\nallocated for node0-\u003enode_mem_map because:\n\n\tstruct page *start \u003d pfn_to_page(start_pfn);\n\t// effectively start \u003d \u0026node-\u003enode_mem_map[0]\n\tfor (page \u003d start; page \u003c (start + size); page++) {\n\t\tinit_page_here();...\n\t\tpage++;\n\t}\n\nSlow, and wasteful, but generally harmless.\n\nBut, modify that to call pfn_to_page() for each loop iteration (like sparsemem\ndoes):\n\n\tfor (pfn \u003d start_pfn; pfn \u003c \u003c (start_pfn + size); pfn++++) {\n\t\tpage \u003d pfn_to_page(pfn);\n\t}\n\nAnd you end up trying to initialize node 1\u0027s pages too early, along with bogus\ndata from node 0. This patch checks for those weird layouts and declines to\ntouch the pages, making the more frequent pfn_to_page() calls OK to do.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\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": "b159d43fbf7eaaac6ecc647f51cf4257332db47b", "tree": "968d856c1bd80b47c76d27da272d95bcaf97aa78", "parents": [ "368a0a3afad08069b2679ecaff80fc18c10a6e2a" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Jun 23 00:07:52 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:04 2005 -0700" }, "message": "[PATCH] generify early_pfn_to_nid\n\nProvide a default implementation for early_pfn_to_nid returning node 0. Allow\narchitectures to override this with their own implementation out of\nasm/mmzone.h.\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": "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": "348f8b6c4837a07304d2f72b11ce8d96588065e0", "tree": "f4c6c332b2c327630b284598325dff2f44e6c9cf", "parents": [ "6f167ec721108c9282d54424516a12c805e3c306" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:40 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:01 2005 -0700" }, "message": "[PATCH] sparsemem base: reorganize page-\u003eflags bit operations\n\nGenerify the value fields in the page_flags. The aim is to allow the location\nand size of these fields to be varied. Additionally we want to move away from\nfixed allocations per field whilst still enforcing the overall bit utilisation\nlimits. We rely on the compiler to spot and optimise the accessor functions.\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" }, { "commit": "408fde81c1bff15c875a3618481e93a01dcc79ea", "tree": "89b173c5cccd69a17aa64bff8916c54bdcb2d6fe", "parents": [ "29c31a3bf257e0723423f1f0f9afd1b840434c75" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Thu Jun 23 00:07:37 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Thu Jun 23 09:45:00 2005 -0700" }, "message": "[PATCH] remove non-DISCONTIG use of pgdat-\u003enode_mem_map\n\nThis patch effectively eliminates direct use of pgdat-\u003enode_mem_map outside\nof the DISCONTIG code. On a flat memory system, these fields aren\u0027t\ncurrently used, neither are they on a sparsemem system.\n\nThere was also a node_mem_map(nid) macro on many architectures. Its use\nalong with the use of -\u003enode_mem_map itself was not consistent. It has\nbeen removed in favor of two new, more explicit, arch-independent macros:\n\n\tpgdat_page_nr(pgdat, pagenr)\n\tnid_page_nr(nid, pagenr)\n\nI called them \"pgdat\" and \"nid\" because we overload the term \"node\" to mean\n\"NUMA node\", \"DISCONTIG node\" or \"pg_data_t\" in very confusing ways. I\nbelieve the newer names are much clearer.\n\nThese macros can be overridden in the sparsemem case with a theoretically\nslower operation using node_start_pfn and pfn_to_page(), instead. We could\nmake this the only behavior if people want, but I don\u0027t want to change too\nmuch at once. One thing at a time.\n\nThis patch removes more code than it adds.\n\nCompile tested on alpha, alpha discontig, arm, arm-discontig, i386, i386\ngeneric, NUMAQ, Summit, ppc64, ppc64 discontig, and x86_64. Full list\nhere: http://sr71.net/patches/2.6.12/2.6.12-rc1-mhp2/configs/\n\nBoot tested on NUMAQ, x86 SMP and ppc64 power4/5 LPARs.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Martin J. 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": "e7c8d5c9955a4d2e88e36b640563f5d6d5aba48a", "tree": "f04f7b0d08cbc46d2f190a85904a3dd696dc6e88", "parents": [ "63551ae0feaaa23807ebea60de1901564bbef32e" ], "author": { "name": "Christoph Lameter", "email": "christoph@lameter.com", "time": "Tue Jun 21 17:14:47 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue Jun 21 18:46:16 2005 -0700" }, "message": "[PATCH] node local per-cpu-pages\n\nThis patch modifies the way pagesets in struct zone are managed.\n\nEach zone has a per-cpu array of pagesets. So any particular CPU has some\nmemory in each zone structure which belongs to itself. Even if that CPU is\nnot local to that zone.\n\nSo the patch relocates the pagesets for each cpu to the node that is nearest\nto the cpu instead of allocating the pagesets in the (possibly remote) target\nzone. This means that the operations to manage pages on remote zone can be\ndone with information available locally.\n\nWe play a macro trick so that non-NUMA pmachines avoid the additional\npointer chase on the page allocator fastpath.\n\nAIM7 benchmark on a 32 CPU SGI Altix\n\nw/o patches:\nTasks jobs/min jti jobs/min/task real cpu\n 1 484.68 100 484.6769 12.01 1.97 Fri Mar 25 11:01:42 2005\n 100 27140.46 89 271.4046 21.44 148.71 Fri Mar 25 11:02:04 2005\n 200 30792.02 82 153.9601 37.80 296.72 Fri Mar 25 11:02:42 2005\n 300 32209.27 81 107.3642 54.21 451.34 Fri Mar 25 11:03:37 2005\n 400 34962.83 78 87.4071 66.59 588.97 Fri Mar 25 11:04:44 2005\n 500 31676.92 75 63.3538 91.87 742.71 Fri Mar 25 11:06:16 2005\n 600 36032.69 73 60.0545 96.91 885.44 Fri Mar 25 11:07:54 2005\n 700 35540.43 77 50.7720 114.63 1024.28 Fri Mar 25 11:09:49 2005\n 800 33906.70 74 42.3834 137.32 1181.65 Fri Mar 25 11:12:06 2005\n 900 34120.67 73 37.9119 153.51 1325.26 Fri Mar 25 11:14:41 2005\n 1000 34802.37 74 34.8024 167.23 1465.26 Fri Mar 25 11:17:28 2005\n\nwith slab API changes and pageset patch:\n\nTasks jobs/min jti jobs/min/task real cpu\n 1 485.00 100 485.0000 12.00 1.96 Fri Mar 25 11:46:18 2005\n 100 28000.96 89 280.0096 20.79 150.45 Fri Mar 25 11:46:39 2005\n 200 32285.80 79 161.4290 36.05 293.37 Fri Mar 25 11:47:16 2005\n 300 40424.15 84 134.7472 43.19 438.42 Fri Mar 25 11:47:59 2005\n 400 39155.01 79 97.8875 59.46 590.05 Fri Mar 25 11:48:59 2005\n 500 37881.25 82 75.7625 76.82 730.19 Fri Mar 25 11:50:16 2005\n 600 39083.14 78 65.1386 89.35 872.79 Fri Mar 25 11:51:46 2005\n 700 38627.83 77 55.1826 105.47 1022.46 Fri Mar 25 11:53:32 2005\n 800 39631.94 78 49.5399 117.48 1169.94 Fri Mar 25 11:55:30 2005\n 900 36903.70 79 41.0041 141.94 1310.78 Fri Mar 25 11:57:53 2005\n 1000 36201.23 77 36.2012 160.77 1458.31 Fri Mar 25 12:00:34 2005\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Shobhit Dayal \u003cshobhit@calsoftinc.com\u003e\nSigned-off-by: Shai Fultheim \u003cShai@Scalex86.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1e7e5a9048b30c57ba1ddaa6cdf59b21b65cde99", "tree": "26eb9c483718ca1a0fad23597c0dfd3a69e9f080", "parents": [ "0c35bbadc59f5ed105c34471143eceb4c0dd9c95" ], "author": { "name": "Martin Hicks", "email": "mort@sgi.com", "time": "Tue Jun 21 17:14:43 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue Jun 21 18:46:14 2005 -0700" }, "message": "[PATCH] VM: rate limit early reclaim\n\nWhen early zone reclaim is turned on the LRU is scanned more frequently when a\nzone is low on memory. This limits when the zone reclaim can be called by\nskipping the scan if another thread (either via kswapd or sync reclaim) is\nalready reclaiming from the zone.\n\nSigned-off-by: Martin Hicks \u003cmort@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "753ee728964e5afb80c17659cc6c3a6fd0a42fe0", "tree": "41c9a7700d0858c1f77c5bdaba97e5b636f69b06", "parents": [ "bfbb38fb808ac23ef44472d05d9bb36edfb49ed0" ], "author": { "name": "Martin Hicks", "email": "mort@sgi.com", "time": "Tue Jun 21 17:14:41 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue Jun 21 18:46:14 2005 -0700" }, "message": "[PATCH] VM: early zone reclaim\n\nThis is the core of the (much simplified) early reclaim. The goal of this\npatch is to reclaim some easily-freed pages from a zone before falling back\nonto another zone.\n\nOne of the major uses of this is NUMA machines. With the default allocator\nbehavior the allocator would look for memory in another zone, which might be\noff-node, before trying to reclaim from the current zone.\n\nThis adds a zone tuneable to enable early zone reclaim. It is selected on a\nper-zone basis and is turned on/off via syscall.\n\nAdding some extra throttling on the reclaim was also required (patch\n4/4). Without the machine would grind to a crawl when doing a \"make -j\"\nkernel build. Even with this patch the System Time is higher on\naverage, but it seems tolerable. Here are some numbers for kernbench\nruns on a 2-node, 4cpu, 8Gig RAM Altix in the \"make -j\" run:\n\n\t\t\twall user sys %cpu ctx sw. sleeps\n\t\t\t---- ---- --- ---- ------ ------\nNo patch\t\t1009 1384 847 258 298170 504402\nw/patch, no reclaim 880 1376 667 288 254064 396745\nw/patch \u0026 reclaim 1079 1385 926 252 291625 548873\n\nThese numbers are the average of 2 runs of 3 \"make -j\" runs done right\nafter system boot. Run-to-run variability for \"make -j\" is huge, so\nthese numbers aren\u0027t terribly useful except to seee that with reclaim\nthe benchmark still finishes in a reasonable amount of time.\n\nI also looked at the NUMA hit/miss stats for the \"make -j\" runs and the\nreclaim doesn\u0027t make any difference when the machine is thrashing away.\n\nDoing a \"make -j8\" on a single node that is filled with page cache pages\ntakes 700 seconds with reclaim turned on and 735 seconds without reclaim\n(due to remote memory accesses).\n\nThe simple zone_reclaim syscall program is at\nhttp://www.bork.org/~mort/sgi/zone_reclaim.c\n\nSigned-off-by: Martin Hicks \u003cmort@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "39c715b71740c4a78ba4769fb54826929bac03cb", "tree": "94dd679dfc8e6c2db65971739aa8c8c6206f8174", "parents": [ "84929801e14d968caeb84795bfbb88f04283fbd9" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jun 21 17:14:34 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue Jun 21 18:46:13 2005 -0700" }, "message": "[PATCH] smp_processor_id() cleanup\n\nThis patch implements a number of smp_processor_id() cleanup ideas that\nArjan van de Ven and I came up with.\n\nThe previous __smp_processor_id/_smp_processor_id/smp_processor_id API\nspaghetti was hard to follow both on the implementational and on the\nusage side.\n\nSome of the complexity arose from picking wrong names, some of the\ncomplexity comes from the fact that not all architectures defined\n__smp_processor_id.\n\nIn the new code, there are two externally visible symbols:\n\n - smp_processor_id(): debug variant.\n\n - raw_smp_processor_id(): nondebug variant. Replaces all existing\n uses of _smp_processor_id() and __smp_processor_id(). Defined\n by every SMP architecture in include/asm-*/smp.h.\n\nThere is one new internal symbol, dependent on DEBUG_PREEMPT:\n\n - debug_smp_processor_id(): internal debug variant, mapped to\n smp_processor_id().\n\nAlso, i moved debug_smp_processor_id() from lib/kernel_lock.c into a new\nlib/smp_processor_id.c file. All related comments got updated and/or\nclarified.\n\nI have build/boot tested the following 8 .config combinations on x86:\n\n {SMP,UP} x {PREEMPT,!PREEMPT} x {DEBUG_PREEMPT,!DEBUG_PREEMPT}\n\nI have also build/boot tested x64 on UP/PREEMPT/DEBUG_PREEMPT. (Other\narchitectures are untested, but should work just fine.)\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Arjan van de Ven \u003carjan@infradead.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "tree": "0bba044c4ce775e45a88a51686b5d9f90697ea9d", "parents": [], "author": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "message": "Linux-2.6.12-rc2\n\nInitial git repository build. I\u0027m not bothering with the full history,\neven though we have it. We can create a separate \"historical\" git\narchive of that later if we want to, and in the meantime it\u0027s about\n3.2GB when imported into git - space that would just make the early\ngit days unnecessarily complicated, when we don\u0027t have a lot of good\ninfrastructure for it.\n\nLet it rip!\n" } ] }