)]}' { "log": [ { "commit": "85a6cd03a97f04ffff7bfedfa3172894ca9a617b", "tree": "6dfcb724b0ed7b2cb9b33c0c18933f0d915bc966", "parents": [ "6218cf4410cfce7bc7e89834e73525b124625d4c" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Thu Mar 09 17:33:34 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 09 19:47:36 2006 -0800" }, "message": "[PATCH] page_add_file_rmap(): remove BUG_ON()s\n\nRemove two early-development BUG_ONs from page_add_file_rmap.\n\nThe pfn_valid test (originally useful for checking that nobody passed an\nartificial struct page) comes too late, since we already have the struct\npage.\n\nThe PageAnon test (useful when anon was first distinguished from file rmap)\nprevents -\u003enopage implementations from reusing -\u003emapping, which would\notherwise be available.\n\nSigned-off-by: 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": "e8788c0cce63e0cc8689a123d1ce0af1e28cd583", "tree": "9350d9fc11a5a6ca81d4ee063278999e4dfe869d", "parents": [ "6af6aab34a88050c8270ef75ddbdefef5c1dca00" ], "author": { "name": "Christoph Lameter", "email": "clameter@engr.sgi.com", "time": "Tue Feb 28 16:59:16 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Feb 28 20:53:44 2006 -0800" }, "message": "[PATCH] remove_from_swap: fix locking\n\nremove_from_swap() currently attempts to use page_lock_anon_vma to obtain\nan anon_vma lock. That is not working since the page may have been\nremapped via swap ptes in order to move the page.\n\nHowever, do_migrate_pages() obtain the mmap_sem lock and therefore there is\na guarantee that the anonymous vma will not vanish from under us. There is\ntherefore no need to use page_lock_anon_vma.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: 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": "e965f9630c651fa4249039fd4b80c9392d07a856", "tree": "1353dd536d0ee549c30e462086624c21788ee9d2", "parents": [ "7e2ab150d1b3b286a4c864c60a549b2601777b63" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Feb 01 03:05:41 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Feb 01 08:53:17 2006 -0800" }, "message": "[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method\n\nMigrate a page with buffers without requiring writeback\n\nThis introduces a new address space operation migratepage() that may be used\nby a filesystem to implement its own version of page migration.\n\nA version is provided that migrates buffers attached to pages. Some\nfilesystems (ext2, ext3, xfs) are modified to utilize this feature.\n\nThe swapper address space operation are modified so that a regular\nmigrate_page() will occur for anonymous pages without writeback (migrate_pages\nforces every anonymous page to have a swap entry).\n\nSigned-off-by: Mike Kravetz \u003ckravetz@us.ibm.com\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a3351e525e4768c29aa5d22ef59b5b38e0361e53", "tree": "457ab54f402b471c5158e8b361d059e88ab8cd62", "parents": [ "a48d07afdf18212de22b959715b16793c5a6e57a" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Feb 01 03:05:39 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Feb 01 08:53:16 2006 -0800" }, "message": "[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes\n\nAdd remove_from_swap\n\nremove_from_swap() allows the restoration of the pte entries that existed\nbefore page migration occurred for anonymous pages by walking the reverse\nmaps. This reduces swap use and establishes regular pte\u0027s without the need\nfor page faults.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a48d07afdf18212de22b959715b16793c5a6e57a", "tree": "36d5963c29ceb5c2f6df53036cef5c0d30383dbf", "parents": [ "b16664e44c54525be89dc07ad15a13b4eeec5634" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Feb 01 03:05:38 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Feb 01 08:53:16 2006 -0800" }, "message": "[PATCH] Direct Migration V9: migrate_pages() extension\n\nAdd direct migration support with fall back to swap.\n\nDirect migration support on top of the swap based page migration facility.\n\nThis allows the direct migration of anonymous pages and the migration of file\nbacked pages by dropping the associated buffers (requires writeout).\n\nFall back to swap out if necessary.\n\nThe patch is based on lots of patches from the hotplug project but the code\nwas restructured, documented and simplified as much as possible.\n\nNote that an additional patch that defines the migrate_page() method for\nfilesystems is necessary in order to avoid writeback for anonymous and file\nbacked pages.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Mike Kravetz \u003ckravetz@us.ibm.com\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "053837fce7aa79025ed57656855df09f80175527", "tree": "05d7615894131a368fc4943f641b11acdd2ae694", "parents": [ "e236a166b2bc437769a9b8b5d19186a3761bde48" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Wed Jan 18 17:42:27 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Jan 18 19:20:17 2006 -0800" }, "message": "[PATCH] mm: migration page refcounting fix\n\nMigration code currently does not take a reference to target page\nproperly, so between unlocking the pte and trying to take a new\nreference to the page with isolate_lru_page, anything could happen to\nit.\n\nFix this by holding the pte lock until we get a chance to elevate the\nrefcount.\n\nOther small cleanups while we\u0027re here.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1b1dcc1b57a49136f118a0f16367256ff9994a69", "tree": "b0b36d4f41d28c9d6514fb309d33c1a084d6309b", "parents": [ "794ee1baee1c26be40410233e6c20bceb2b03c08" ], "author": { "name": "Jes Sorensen", "email": "jes@sgi.com", "time": "Mon Jan 09 15:59:24 2006 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@hera.kernel.org", "time": "Mon Jan 09 15:59:24 2006 -0800" }, "message": "[PATCH] mutex subsystem, semaphore to mutex: VFS, -\u003ei_sem\n\nThis patch converts the inode semaphore to a mutex. I have tested it on\nXFS and compiled as much as one can consider on an ia64. Anyway your\nluck with it might be different.\n\nModified-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n\n(finished the conversion)\n\nSigned-off-by: Jes Sorensen \u003cjes@sgi.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ef2bf0dc8675e14cf8cba3b7fb9f48d72640a70e", "tree": "6ef3afba5ca1929cc982efad092ffae62233b813", "parents": [ "cd105df4590c89837a1c300843238148cfef9b5f" ], "author": { "name": "Dave Jones", "email": "davej@redhat.com", "time": "Sun Jan 08 01:01:00 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jan 08 20:12:44 2006 -0800" }, "message": "[PATCH] rmap: additional diagnostics in page_remove_rmap()\n\nWe seem to be hitting this assertion failure too often for it to be\nhardware bugs.\n\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "a74609fafa2e5cc31d558012abaaa55ec9ad9da4", "tree": "0be653692864d99da345b575dfe2083994ee1d21", "parents": [ "d3cb487149bd706aa6aeb02042332a450978dc1c" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Fri Jan 06 00:11:20 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:29 2006 -0800" }, "message": "[PATCH] mm: page_state opt\n\nOptimise page_state manipulations by introducing interrupt unsafe accessors\nto page_state fields. Callers must provide their own locking (either\ndisable interrupts or not update from interrupt context).\n\nSwitch over the hot callsites that can easily be moved under interrupts off\nsections.\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": "9617d95e6e9ffd883cf90a89724fe60d7ab22f9a", "tree": "67d555d34d931bd253fbc4959ffdb1e5b904f2b0", "parents": [ "224abf92b2f439a9030f21d2926ec8047d1ffcdb" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Fri Jan 06 00:11:12 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:27 2006 -0800" }, "message": "[PATCH] mm: rmap optimisation\n\nOptimise rmap functions by minimising atomic operations when we know there\nwill be no concurrent modifications.\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": "eca351336acb2fa943611e0846562ce3997ef53b", "tree": "9b7b022d7b2d5f2f23bc979fa8bf5c1e418456bd", "parents": [ "d70aa5e4b54aa7e704c886838715ac8a45d5750f" ], "author": { "name": "Ben Collins", "email": "bcollins@debian.org", "time": "Tue Nov 29 11:45:26 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Nov 29 12:57:17 2005 -0800" }, "message": "[PATCH] Fix missing pfn variables caused by vm changes\n\nI image this showed up because of \"unused var...\" when the changes\noccured, because flush_cache_page() is a noop in most places. This\nshowed up for me on parisc however, where flush_cache_page() is a real\nfunction.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "f7b7fd8f3ebbb2810d6893295aa984acd0fd30db", "tree": "01afc1edafc50a3c65ec8576c05c60da53d8d242", "parents": [ "a93a117eaa0bec426d4671a49bfa96a6fdcd2ac9" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Mon Nov 28 13:44:07 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 28 14:42:25 2005 -0800" }, "message": "[PATCH] temporarily disable swap token on memory pressure\n\nSome users (hi Zwane) have seen a problem when running a workload that\neats nearly all of physical memory - th system does an OOM kill, even\nwhen there is still a lot of swap free.\n\nThe problem appears to be a very big task that is holding the swap\ntoken, and the VM has a very hard time finding any other page in the\nsystem that is swappable.\n\nInstead of ignoring the swap token when sc-\u003epriority reaches 0, we could\nsimply take the swap token away from the memory hog and make sure we\ndon\u0027t give it back to the memory hog for a few seconds.\n\nThis patch resolves the problem Zwane ran into.\n\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "6aab341e0a28aff100a09831c5300a2994b8b986", "tree": "1af3908275aa5e1b16e80efee554a9a7504c56d4", "parents": [ "458af5439fe7ae7d95ca14106844e61f0795166c" ], "author": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 28 14:34:23 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 28 14:34:23 2005 -0800" }, "message": "mm: re-architect the VM_UNPAGED logic\n\nThis replaces the (in my opinion horrible) VM_UNMAPPED logic with very\nexplicit support for a \"remapped page range\" aka VM_PFNMAP. It allows a\nVM area to contain an arbitrary range of page table entries that the VM\nnever touches, and never considers to be normal pages.\n\nAny user of \"remap_pfn_range()\" automatically gets this new\nfunctionality, and doesn\u0027t even have to mark the pages reserved or\nindeed mark them any other way. It just works. As a side effect, doing\nmmap() on /dev/mem works for arbitrary ranges.\n\nSparc update from David in the next commit.\n\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ee498ed730283e9cdfc8913f12b90a2246f1a8cc", "tree": "797966a8454e40fdf1879bacea510ad8c55a91a2", "parents": [ "920fc356f58d0e455bdfa53451f1c58eb211a846" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Nov 21 21:32:18 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Nov 22 09:13:42 2005 -0800" }, "message": "[PATCH] unpaged: anon in VM_UNPAGED\n\ncopy_one_pte needs to copy the anonymous COWed pages in a VM_UNPAGED area,\nzap_pte_range needs to free them, do_wp_page needs to COW them: just like\nordinary pages, not like the unpaged.\n\nBut recognizing them is a little subtle: because PageReserved is no longer a\ncondition for remap_pfn_range, we can now mmap all of /dev/mem (whether the\ndistro permits, and whether it\u0027s advisable on this or that architecture, is\nanother matter). So if we can see a PageAnon, it may not be ours to mess with\n(or may be ours from elsewhere in the address space). I suspect there\u0027s an\nentertaining insoluble self-referential problem here, but the page_is_anon\nfunction does a good practical job, and MAP_PRIVATE PROT_WRITE VM_UNPAGED will\nalways be an odd choice.\n\nIn updating the comment on page_address_in_vma, noticed a potential NULL\ndereference, in a path we don\u0027t actually take, but fixed it.\n\nSigned-off-by: 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": "101d2be7646b7dd1c367d50208a59b29fce61398", "tree": "5b01c8a93a749cc776744c71c4f79e95ef5d6393", "parents": [ "0b14c179a483e71ea41df2aa4a661760063115bd" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Nov 21 21:32:16 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Nov 22 09:13:42 2005 -0800" }, "message": "[PATCH] unpaged: VM_NONLINEAR VM_RESERVED\n\nThere\u0027s one peculiar use of VM_RESERVED which the previous patch left behind:\nbecause VM_NONLINEAR\u0027s try_to_unmap_cluster uses vm_private_data as a swapout\ncursor, but should never meet VM_RESERVED vmas, it was a way of extending\nVM_NONLINEAR to VM_RESERVED vmas using vm_private_data for some other purpose.\n But that\u0027s an empty set - they don\u0027t have the populate function required. So\njust throw away those VM_RESERVED tests.\n\nBut one more interesting in rmap.c has to go too: try_to_unmap_one will want\nto swap out an anonymous page from VM_RESERVED or VM_UNPAGED area.\n\nSigned-off-by: 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": "b8072f099b7829a6ff3eba618e1d079a81f753f8", "tree": "80bf801b68ecf5f29a61f0f4fd5976b4daa91c6a", "parents": [ "f412ac08c9861b4791af0145934c22f1458686da" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:41 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:42 2005 -0700" }, "message": "[PATCH] mm: update comments to pte lock\n\nUpdated several references to page_table_lock in common code comments.\n\nSigned-off-by: 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": "f412ac08c9861b4791af0145934c22f1458686da", "tree": "5e515efa116f3968c2caa75bc691a197199313a8", "parents": [ "4c21e2f2441dc5fbb957b030333f5a3f2d02dea7" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:41 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:42 2005 -0700" }, "message": "[PATCH] mm: fix rss and mmlist locking\n\nA couple of oddities were guarded by page_table_lock, no longer properly\nguarded when that is split.\n\nThe mm_counters of file_rss and anon_rss: make those an atomic_t, or an\natomic64_t if the architecture supports it, in such a case. Definitions by\ncourtesy of Christoph Lameter: who spent considerable effort on more scalable\nways of counting, but found insufficient benefit in practice.\n\nAnd adding an mm with swap to the mmlist for swapoff: the list is well-\nguarded by its own lock, but the list_empty check now has to be repeated\ninside it.\n\nSigned-off-by: 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": "4c21e2f2441dc5fbb957b030333f5a3f2d02dea7", "tree": "1f76d33bb1d76221c6424bc5fed080a4f91349a6", "parents": [ "b38c6845b695141259019e2b7c0fe6c32a6e720d" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:40 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:42 2005 -0700" }, "message": "[PATCH] mm: split page table lock\n\nChristoph Lameter demonstrated very poor scalability on the SGI 512-way, with\na many-threaded application which concurrently initializes different parts of\na large anonymous area.\n\nThis patch corrects that, by using a separate spinlock per page table page, to\nguard the page table entries in that page, instead of using the mm\u0027s single\npage_table_lock. (But even then, page_table_lock is still used to guard page\ntable allocation, and anon_vma allocation.)\n\nIn this implementation, the spinlock is tucked inside the struct page of the\npage table page: with a BUILD_BUG_ON in case it overflows - which it would in\nthe case of 32-bit PA-RISC with spinlock debugging enabled.\n\nSplitting the lock is not quite for free: another cacheline access. Ideally,\nI suppose we would use split ptlock only for multi-threaded processes on\nmulti-cpu machines; but deciding that dynamically would have its own costs.\nSo for now enable it by config, at some number of cpus - since the Kconfig\nlanguage doesn\u0027t support inequalities, let preprocessor compare that with\nNR_CPUS. But I don\u0027t think it\u0027s worth being user-configurable: for good\ntesting of both split and unsplit configs, split now at 4 cpus, and perhaps\nchange that to 8 later.\n\nThere is a benefit even for singly threaded processes: kswapd can be attacking\none part of the mm while another part is busy faulting.\n\nSigned-off-by: 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": "c0718806cf955d5eb51ea77bffb5b21d9bba4972", "tree": "bd29659bbff68604127439ec8144230a40772621", "parents": [ "67b02f119df50ffad5a4e9e53ea4c896535862cd" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:31 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:41 2005 -0700" }, "message": "[PATCH] mm: rmap with inner ptlock\n\nrmap\u0027s page_check_address descend without page_table_lock. First just\npte_offset_map in case there\u0027s no pte present worth locking for, then take\npage_table_lock for the full check, and pass ptl back to caller in the same\nstyle as pte_offset_map_lock. __xip_unmap, page_referenced_one and\ntry_to_unmap_one use pte_unmap_unlock. try_to_unmap_cluster also.\n\npage_check_address reformatted to avoid progressive indentation. No use is\nmade of its one error code, return NULL when it fails.\n\nSigned-off-by: 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": "365e9c87a982c03d0af3886e29d877f581b59611", "tree": "d06c1918ca9fe6677d7e4e869555e095004274f7", "parents": [ "861f2fb8e796022b4928cab9c74fca6681a1c557" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:18 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:39 2005 -0700" }, "message": "[PATCH] mm: update_hiwaters just in time\n\nupdate_mem_hiwater has attracted various criticisms, in particular from those\nconcerned with mm scalability. Originally it was called whenever rss or\ntotal_vm got raised. Then many of those callsites were replaced by a timer\ntick call from account_system_time. Now Frank van Maarseveen reports that to\nbe found inadequate. How about this? Works for Frank.\n\nReplace update_mem_hiwater, a poor combination of two unrelated ops, by macros\nupdate_hiwater_rss and update_hiwater_vm. Don\u0027t attempt to keep\nmm-\u003ehiwater_rss up to date at timer tick, nor every time we raise rss (usually\nby 1): those are hot paths. Do the opposite, update only when about to lower\nrss (usually by many), or just before final accounting in do_exit. Handle\nmm-\u003ehiwater_vm in the same way, though it\u0027s much less of an issue. Demand\nthat whoever collects these hiwater statistics do the work of taking the\nmaximum with rss or total_vm.\n\nAnd there has been no collector of these hiwater statistics in the tree. The\nnew convention needs an example, so match Frank\u0027s usage by adding a VmPeak\nline above VmSize to /proc/\u003cpid\u003e/status, and also a VmHWM line above VmRSS\n(High-Water-Mark or High-Water-Memory).\n\nThere was a particular anomaly during mremap move, that hiwater_vm might be\ncaptured too high. A fleeting such anomaly remains, but it\u0027s quickly\ncorrected now, whereas before it would stick.\n\nWhat locking? None: if the app is racy then these statistics will be racy,\nit\u0027s not worth any overhead to make them exact. But whenever it suits,\nhiwater_vm is updated under exclusive mmap_sem, and hiwater_rss under\npage_table_lock (for now) or with preemption disabled (later on): without\ngoing to any trouble, minimize the time between reading current values and\nupdating, to minimize those occasions when a racing thread bumps a count up\nand back down in between.\n\nSigned-off-by: 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": "b5810039a54e5babf428e9a1e89fc1940fabff11", "tree": "835836cb527ec9bd525f93eb7e016f3dfb8c8ae2", "parents": [ "f9c98d0287de42221c624482fd4f8d485c98ab22" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Oct 29 18:16:12 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:39 2005 -0700" }, "message": "[PATCH] core remove PageReserved\n\nRemove PageReserved() calls from core code by tightening VM_RESERVED\nhandling in mm/ to cover PageReserved functionality.\n\nPageReserved special casing is removed from get_page and put_page.\n\nAll setting and clearing of PageReserved is retained, and it is now flagged\nin the page_alloc checks to help ensure we don\u0027t introduce any refcount\nbased freeing of Reserved pages.\n\nMAP_PRIVATE, PROT_WRITE of VM_RESERVED regions is tentatively being\ndeprecated. We never completely handled it correctly anyway, and is be\nreintroduced in future if required (Hugh has a proof of concept).\n\nOnce PageReserved() calls are removed from kernel/power/swsusp.c, and all\narch/ and driver code, the Set and Clear calls, and the PG_reserved bit can\nbe trivially removed.\n\nLast real user of PageReserved is swsusp, which uses PageReserved to\ndetermine whether a struct page points to valid memory or not. This still\nneeds to be addressed (a generic page_is_ram() should work).\n\nA last caveat: the ZERO_PAGE is now refcounted and managed with rmap (and\nthus mapcounted and count towards shared rss). These writes to the struct\npage could cause excessive cacheline bouncing on big systems. There are a\nnumber of ways this could be addressed if it is an issue.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\n\nRefcount bug fix for filemap_xip.c\n\nSigned-off-by: Carsten Otte \u003ccotte@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4294621f41a85497019fae64341aa5351a1921b7", "tree": "fdeb7eb44384a99d0679ffa6de5019bab0ea2166", "parents": [ "404351e67a9facb475abf1492245374a28d13e90" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:05 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:38 2005 -0700" }, "message": "[PATCH] mm: rss \u003d file_rss + anon_rss\n\nI was lazy when we added anon_rss, and chose to change as few places as\npossible. So currently each anonymous page has to be counted twice, in rss\nand in anon_rss. Which won\u0027t be so good if those are atomic counts in some\nconfigurations.\n\nChange that around: keep file_rss and anon_rss separately, and add them\ntogether (with get_mm_rss macro) when the total is needed - reading two\natomics is much cheaper than updating two atomics. And update anon_rss\nupfront, typically in memory.c, not tucked away in page_add_anon_rmap.\n\nSigned-off-by: 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": "fcdae29aa7a5c79f245110f6680afdc1858d3626", "tree": "09634921c68dd82a661c1ba389133e7f805e2d0f", "parents": [ "eb92f4ef320b738e41ad43476a5d05c8a20d5cc7" ], "author": { "name": "Rik Van Riel", "email": "riel@redhat.com", "time": "Sat Oct 29 18:15:46 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:35 2005 -0700" }, "message": "[PATCH] swaptoken tuning\n\nIt turns out that the original swap token implementation, by Song Jiang, only\nenforced the swap token while the task holding the token is handling a page\nfault. This patch approximates that, without adding an additional flag to the\nmm_struct, by checking whether the mm-\u003emmap_sem is held for reading, like the\npage fault code does.\n\nThis patch has the effect of automatically, and gradually, disabling the\nenforcement of the swap token when there is little or no paging going on, and\n\"turning up\" the intensity of the swap token code the more the task holding\nthe token is thrashing.\n\nThanks to Song Jiang for pointing out this aspect of the token based thrashing\ncontrol concept.\n\nThe new code shows a slight degradation over the old swap token code, but\nstill a big win over running without the swap token.\n\n2.6.12+ swap token disabled\n\n$ for i in `seq 10` ; do /usr/bin/time ./qsbench -n 30000000 -p 3 ; done\n101.74user 23.13system 8:26.91elapsed 24%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (38597major+430315minor)pagefaults 0swaps\n101.98user 24.91system 8:03.06elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (33939major+430457minor)pagefaults 0swaps\n101.93user 22.12system 7:34.90elapsed 27%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (33166major+421267minor)pagefaults 0swaps\n101.82user 22.38system 8:31.40elapsed 24%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (39338major+433262minor)pagefaults 0swaps\n\n2.6.12+ swap token enabled, timeout 300 seconds\n\n$ for i in `seq 4` ; do /usr/bin/time ./qsbench -n 30000000 -p 3 ; done\n102.58user 16.08system 3:41.44elapsed 53%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (19707major+285786minor)pagefaults 0swaps\n102.07user 19.56system 4:00.64elapsed 50%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (19012major+299259minor)pagefaults 0swaps\n102.64user 18.25system 4:07.31elapsed 48%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (21990major+304831minor)pagefaults 0swaps\n101.39user 19.41system 5:15.81elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (24850major+323321minor)pagefaults 0swaps\n\n2.6.12+ with new swap token code, timeout 300 seconds\n\n$ for i in `seq 4` ; do /usr/bin/time ./qsbench -n 30000000 -p 3 ; done\n101.87user 24.66system 5:53.20elapsed 35%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (26848major+363497minor)pagefaults 0swaps\n102.83user 19.95system 4:17.25elapsed 47%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (19946major+305722minor)pagefaults 0swaps\n102.09user 19.46system 5:12.57elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (25461major+334994minor)pagefaults 0swaps\n101.67user 20.61system 4:52.97elapsed 41%CPU (0avgtext+0avgdata 0maxresident)k\n0inputs+0outputs (22190major+329508minor)pagefaults 0swaps\n\nSigned-off-by: Rik Van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4d7670e0f649f9e6e6ea6c8bb9f52441fa00f92b", "tree": "52009a96e89a4fe2ff390cd34a7832c89d28f588", "parents": [ "2822c1aa574d277b9ba0130b1e71c1a5874bc04a" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Sep 03 15:54:48 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:43 2005 -0700" }, "message": "[PATCH] mm: cleanup rmap\n\nThanks to Bill Irwin for pointing this out.\n\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": "2822c1aa574d277b9ba0130b1e71c1a5874bc04a", "tree": "6a48d5db83831b6521bbc5795a70ea5ab7446b0e", "parents": [ "c3dce2d89c269d5373a120d4a22fc2426ec992b0" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Sep 03 15:54:47 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:43 2005 -0700" }, "message": "[PATCH] mm: micro-optimise rmap\n\nMicrooptimise page_add_anon_rmap. Although these expressions are used only in\nthe taken branch of the if() statement, the compiler can\u0027t reorder them inside\nbecause atomic_inc_and_test is a barrier.\n\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": "c3dce2d89c269d5373a120d4a22fc2426ec992b0", "tree": "d4a52e35751484935a15f3b95e84bd28d6662b18", "parents": [ "6e21c8f145f5052c1c2fb4a4b41bee01c848159b" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sat Sep 03 15:54:46 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:43 2005 -0700" }, "message": "[PATCH] mm: comment rmap\n\nJust be clear that VM_RESERVED pages here are a bug, and the test is not there\nbecause they are expected.\n\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": "839b9685e80592809d6dfdd865986cd1b5ddc2fb", "tree": "9c46cc93d8467035419028e6e47f25a547e6ad9a", "parents": [ "3279ffd97f1b3962e40d3c5f09495ef8320b180b" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Sep 03 15:54:43 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:42 2005 -0700" }, "message": "[PATCH] rmap: don\u0027t test rss\n\nRemove the three get_mm_counter(mm, rss) tests from rmap.c: there was a\ntime when testing rss was important to avoid a particular race between\ndup_mmap and the anonmm rmap; but now it\u0027s just a rather silly pseudo-\noptimization, made even more obscure by the get_mm_counter macro.\n\nSigned-off-by: 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": "5d337b9194b1ce3b6fd5f3cb2799455ed2f9a3d1", "tree": "91ed9ef6f4cb5f6a1832f2baaaabd53fcd83513e", "parents": [ "048c27fd72816b44e096997d1c6901c3abbfd45b" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Sep 03 15:54:41 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:42 2005 -0700" }, "message": "[PATCH] swap: swap_lock replace list+device\n\nThe idea of a swap_device_lock per device, and a swap_list_lock over them all,\nis appealing; but in practice almost every holder of swap_device_lock must\nalready hold swap_list_lock, which defeats the purpose of the split.\n\nThe only exceptions have been swap_duplicate, valid_swaphandles and an\nuntrodden path in try_to_unuse (plus a few places added in this series).\nvalid_swaphandles doesn\u0027t show up high in profiles, but swap_duplicate does\ndemand attention. However, with the hold time in get_swap_pages so much\nreduced, I\u0027ve not yet found a load and set of swap device priorities to show\neven swap_duplicate benefitting from the split. Certainly the split is mere\noverhead in the common case of a single swap device.\n\nSo, replace swap_list_lock and swap_device_lock by spinlock_t swap_lock\n(generally we seem to prefer an _ in the name, and not hide in a macro).\n\nIf someone can show a regression in swap_duplicate, then probably we should\nadd a hashlock for the swap_map entries alone (shorts being anatomic), so as\nto help the case of the single swap device too.\n\nSigned-off-by: 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": "ceffc078528befc008c6f2c2c4decda79eabd534", "tree": "a289e10162bdef0c0d9f6533f1a647b0fe1ed7a9", "parents": [ "420edbcc09008342c7b2665453f6b370739aadb0" ], "author": { "name": "Carsten Otte", "email": "cotte@de.ibm.com", "time": "Thu Jun 23 22:05:25 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Fri Jun 24 00:06:41 2005 -0700" }, "message": "[PATCH] xip: fs/mm: execute in place\n\n- generic_file* file operations do no longer have a xip/non-xip split\n- filemap_xip.c implements a new set of fops that require get_xip_page\n aop to work proper. all new fops are exported GPL-only (don\u0027t like to\n see whatever code use those except GPL modules)\n- __xip_unmap now uses page_check_address, which is no longer static\n in rmap.c, and defined in linux/rmap.h\n- mm/filemap.h is now much more clean, plainly having just Linus\u0027\n inline funcs moved here from filemap.c\n- fix includes in filemap_xip to make it build cleanly on i386\n\nSigned-off-by: Carsten Otte \u003ccotte@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c475a8ab625d567eacf5e30ec35d6d8704558062", "tree": "0971bef7b876f1b3eb160621fc2b61cb5313827b", "parents": [ "d296e9cd02c92e576ecce5344026a4df4353cdb2" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jun 21 17:15:12 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue Jun 21 18:46:21 2005 -0700" }, "message": "[PATCH] can_share_swap_page: use page_mapcount\n\nRemember that ironic get_user_pages race? when the raised page_count on a\npage swapped out led do_wp_page to decide that it had to copy on write, so\nsubstituted a different page into userspace. 2.6.7 onwards have Andrea\u0027s\nsolution, where try_to_unmap_one backs out if it finds page_count raised.\n\nWhich works, but is unsatisfying (rmap.c has no other page_count heuristics),\nand was found a few months ago to hang an intensive page migration test. A\nyear ago I was hesitant to engage page_mapcount, now it seems the right fix.\n\nSo remove the page_count hack from try_to_unmap_one; and use activate_page in\nunuse_mm when dropping lock, to replace its secondary effect of helping\nswapoff to make progress in that case.\n\nSimplify can_share_swap_page (now called only on anonymous pages) to check\npage_mapcount + page_swapcount \u003d\u003d 1: still needs the page lock to stabilize\ntheir (pessimistic) sum, but does not need swapper_space.tree_lock for that.\n\nIn do_swap_page, move swap_free and unlock_page below page_add_anon_rmap, to\nkeep sum on the high side, and correct when can_share_swap_page called.\n\nSigned-off-by: 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": "cafdd8ba08935d9b161bb781851dc4c0e6f70427", "tree": "ee6a5305902cfd6abf818e398c538694db24dcb7", "parents": [ "c33880aaddbbab1ccf36f4457ed1090621f2e39a" ], "author": { "name": "William Lee Irwin III", "email": "wli@holomorphy.com", "time": "Tue May 24 19:31:09 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue May 24 20:08:13 2005 -0700" }, "message": "[PATCH] try_to_unmap_cluster() passes out-of-bounds pte to pte_unmap()\n\ntry_to_unmap_cluster() does:\n for (pte \u003d pte_offset_map(pmd, address);\n address \u003c end; pte++, address +\u003d PAGE_SIZE) {\n\t\t...\n\t}\n\n\tpte_unmap(pte);\n\nIt may take a little staring to notice, but pte can actually fall off the\nend of the pte page in this iteration, which makes life difficult for\nkmap_atomic() and the users not expecting it to BUG(). Of course, we\u0027re\nsomewhat lucky in that arithmetic elsewhere in the function guarantees that\nat least one iteration is made, lest this force larger rearrangements to be\nmade. This issue and patch also apply to non-mm mainline and with trivial\nadjustments, at least two related kernels.\n\nDiscovered during internal testing at Oracle.\n\nSigned-off-by: William Irwin \u003cwli@holomorphy.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "202d182a92c60416680e31baa697faa60b0882f5", "tree": "361fdd4f061791e980ef686c1a914a96e6711c8b", "parents": [ "7a5febe9ffeecd1e78c5b505260ccc1ef18021b4" ], "author": { "name": "Bjorn Steinbrink", "email": "B.Steinbrink@gmx.de", "time": "Mon May 16 21:53:17 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Tue May 17 07:59:12 2005 -0700" }, "message": "[PATCH] mm: fix rss counter being incremented when unmapping\n\nThis patch fixes a bug introduced by the \"mm counter operations through\nmacros\" patch, which replaced a decrement operation in with an increment\nmacro in try_to_unmap_one().\n\nSigned-off-by: Björn Steinbrink \u003cB.Steinbrink@gmx.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "81b4082dc7666e2bc5ec229d8e837f3bafb96883", "tree": "d37c73b9fa3d3d321d0997113c9170b52aeb10b6", "parents": [ "119f657c72fc07d6fd28c61de59cfba1566970a9" ], "author": { "name": "Nikita Danilov", "email": "nikita@clusterfs.com", "time": "Sun May 01 08:58:36 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sun May 01 08:58:36 2005 -0700" }, "message": "[PATCH] mm: rmap.c cleanup\n\nmm/rmap.c:page_referenced_one() and mm/rmap.c:try_to_unmap_one() contain\nidentical code that\n\n - takes mm-\u003epage_table_lock;\n\n - drills through page tables;\n\n - checks that correct pte is reached.\n\nCoalesce this into page_check_address()\n\nSigned-off-by: Nikita Danilov \u003cnikita@clusterfs.com\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" } ] }