)]}' { "log": [ { "commit": "2c48b9c45579a9b5e3e74694eebf3d2451f3dbd3", "tree": "cecbf786ae0650368a8136bdd90910e05d9b95c3", "parents": [ "a95161aaa801c18c52b2e7cf3d6b4b141c00a20a" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Aug 09 00:52:35 2009 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Dec 16 12:16:42 2009 -0500" }, "message": "switch alloc_file() to passing struct path\n\n... and have the caller grab both mnt and dentry; kill\nleak in infiniband, while we are at it.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "3d1e463158febf6e047897597722f768b15350cd", "tree": "f218ad1ccb0b8d7d2b18814e209ed97b2724ecc8", "parents": [ "cc3808f8c354889982e7e323050f1e50ad99a009" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sat Aug 08 23:56:29 2009 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Dec 16 12:16:42 2009 -0500" }, "message": "get rid of init_file()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "aeb5d727062a0238a2f96c9c380fbd2be4640c6f", "tree": "51dae8a071fcf42e4431a66d37c5b843c8e99cf6", "parents": [ "2515ddc6db8eb49a79f0fe5e67ff09ac7c81eab4" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Sep 02 15:28:45 2008 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Oct 21 07:47:06 2008 -0400" }, "message": "[PATCH] introduce fmode_t, do annotations\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "1027abe8827b47f7e9c4ed6514fde3d44f79963c", "tree": "be6aba7e46176534cc71622de53a8bcbf28a06c4", "parents": [ "a1bc6eb4b499ae67ada9a01660010580b6569403" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 30 04:13:04 2008 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Aug 01 11:25:23 2008 -0400" }, "message": "[PATCH] merge locate_fd() and get_unused_fd()\n\n\tNew primitive: alloc_fd(start, flags). get_unused_fd() and\nget_unused_fd_flags() become wrappers on top of it.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "9f3acc3140444a900ab280de942291959f0f615d", "tree": "0d7f3f9698071ff90fb9a127a4c6e86e1c37c945", "parents": [ "a2dcb44c3c5a8151d2d9f6ac8ad0789efcdbe184" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Apr 24 07:44:08 2008 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu May 01 13:08:16 2008 -0400" }, "message": "[PATCH] split linux/file.h\n\nInitial splitoff of the low-level stuff; taken to fdtable.h\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "3b1253880b7a9e6db54b943b2d40bcf2202f58ab", "tree": "5301be7b4d4310faa8db5a0d027b81421e36570e", "parents": [ "fd8328be874f4190a811c58cd4778ec2c74d2c05" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Apr 22 05:31:30 2008 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Apr 25 09:23:59 2008 -0400" }, "message": "[PATCH] sanitize unshare_files/reset_files_struct\n\n* let unshare_files() give caller the displaced files_struct\n* don\u0027t bother with grabbing reference only to drop it in the\n caller if it hadn\u0027t been shared in the first place\n* in that form unshare_files() is trivially implemented via\n unshare_fd(), so we eliminate the duplicate logics in fork.c\n* reset_files_struct() is not just only called for current;\n it will break the system if somebody ever calls it for anything\n else (we can\u0027t modify -\u003efiles of somebody else). Lose the\n task_struct * argument.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "aceaf78da92a53f5e1b105649a1b8c0afdb2135c", "tree": "cab04e05f8b504b0a11d4986045bc3b08a3a1e75", "parents": [ "8366025eb80dfa0d8d94b286d53027081c280ef1" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Fri Feb 15 14:37:31 2008 -0800" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sat Apr 19 00:25:32 2008 -0400" }, "message": "[PATCH] r/o bind mounts: create helper to drop file write access\n\nIf someone decides to demote a file from r/w to just\nr/o, they can use this same code as __fput().\n\nNFS does just that, and will use this in the next\npatch.\n\nAV: drop write access in __fput() only after we evict from file list.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Erez Zadok \u003cezk@cs.sunysb.edu\u003e\nCc: Trond Myklebust \u003ctrond.myklebust@fys.uio.no\u003e\nCc: \"J Bruce Fields\" \u003cbfields@fieldses.org\u003e\nAcked-by: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b3c97528689619fc66569b30bf83d09d9929521a", "tree": "91dc53590deab88c9bf255c2b5cbd74bdbc36de1", "parents": [ "aa02cd2d9bd1e24a230bd66a0a741b984d03915a" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Wed Feb 13 15:03:15 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Feb 13 16:21:18 2008 -0800" }, "message": "include/linux: Remove all users of FASTCALL() macro\n\nFASTCALL() is always expanded to empty, remove it.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ce8d2cdf3d2b73e346c82e6f0a46da331df6364c", "tree": "bf3597f2d4f57d6e30a7703d7fce0dbf8c757962", "parents": [ "348366b963e4e1462c8354827a9cb910aa865bf2" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Tue Oct 16 23:31:13 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:04 2007 -0700" }, "message": "r/o bind mounts: filesystem helpers for custom \u0027struct file\u0027s\n\nWhy do we need r/o bind mounts?\n\nThis feature allows a read-only view into a read-write filesystem. In the\nprocess of doing that, it also provides infrastructure for keeping track of\nthe number of writers to any given mount.\n\nThis has a number of uses. It allows chroots to have parts of filesystems\nwritable. It will be useful for containers in the future because users may\nhave root inside a container, but should not be allowed to write to\nsomefilesystems. This also replaces patches that vserver has had out of the\ntree for several years.\n\nIt allows security enhancement by making sure that parts of your filesystem\nread-only (such as when you don\u0027t trust your FTP server), when you don\u0027t want\nto have entire new filesystems mounted, or when you want atime selectively\nupdated. I\u0027ve been using the following script to test that the feature is\nworking as desired. It takes a directory and makes a regular bind and a r/o\nbind mount of it. It then performs some normal filesystem operations on the\nthree directories, including ones that are expected to fail, like creating a\nfile on the r/o mount.\n\nThis patch:\n\nSome filesystems forego the vfs and may_open() and create their own \u0027struct\nfile\u0027s.\n\nThis patch creates a couple of helper functions which can be used by these\nfilesystems, and will provide a unified place which the r/o bind mount code\nmay patch.\n\nAlso, rename an existing, static-scope init_file() to a less generic name.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4a19542e5f694cd408a32c3d9dc593ba9366e2d7", "tree": "12f5fd603b516b4e24ec4850d5589273d24be569", "parents": [ "f23513e8d96cf5e6cf8d2ff0cb5dd6bbc33995e4" ], "author": { "name": "Ulrich Drepper", "email": "drepper@redhat.com", "time": "Sun Jul 15 23:40:34 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Jul 16 09:05:45 2007 -0700" }, "message": "O_CLOEXEC for SCM_RIGHTS\n\nPart two in the O_CLOEXEC saga: adding support for file descriptors received\nthrough Unix domain sockets.\n\nThe patch is once again pretty minimal, it introduces a new flag for recvmsg\nand passes it just like the existing MSG_CMSG_COMPAT flag. I think this bit\nis not used otherwise but the networking people will know better.\n\nThis new flag is not recognized by recvfrom and recv. These functions cannot\nbe used for that purpose and the asymmetry this introduces is not worse than\nthe already existing MSG_CMSG_COMPAT situations.\n\nThe patch must be applied on the patch which introduced O_CLOEXEC. It has to\nremove static from the new get_unused_fd_flags function but since scm.c cannot\nlive in a module the function still hasn\u0027t to be exported.\n\nHere\u0027s a test program to make sure the code works. It\u0027s so much longer than\nthe actual patch...\n\n#include \u003cerrno.h\u003e\n#include \u003cerror.h\u003e\n#include \u003cfcntl.h\u003e\n#include \u003cstdio.h\u003e\n#include \u003cstring.h\u003e\n#include \u003cunistd.h\u003e\n#include \u003csys/socket.h\u003e\n#include \u003csys/un.h\u003e\n\n#ifndef O_CLOEXEC\n# define O_CLOEXEC 02000000\n#endif\n#ifndef MSG_CMSG_CLOEXEC\n# define MSG_CMSG_CLOEXEC 0x40000000\n#endif\n\nint\nmain (int argc, char *argv[])\n{\n if (argc \u003e 1)\n {\n int fd \u003d atol (argv[1]);\n printf (\"child: fd \u003d %d\\n\", fd);\n if (fcntl (fd, F_GETFD) \u003d\u003d 0 || errno !\u003d EBADF)\n {\n puts (\"file descriptor valid in child\");\n return 1;\n }\n return 0;\n\n }\n\n struct sockaddr_un sun;\n strcpy (sun.sun_path, \"./testsocket\");\n sun.sun_family \u003d AF_UNIX;\n\n char databuf[] \u003d \"hello\";\n struct iovec iov[1];\n iov[0].iov_base \u003d databuf;\n iov[0].iov_len \u003d sizeof (databuf);\n\n union\n {\n struct cmsghdr hdr;\n char bytes[CMSG_SPACE (sizeof (int))];\n } buf;\n struct msghdr msg \u003d { .msg_iov \u003d iov, .msg_iovlen \u003d 1,\n .msg_control \u003d buf.bytes,\n .msg_controllen \u003d sizeof (buf) };\n struct cmsghdr *cmsg \u003d CMSG_FIRSTHDR (\u0026msg);\n\n cmsg-\u003ecmsg_level \u003d SOL_SOCKET;\n cmsg-\u003ecmsg_type \u003d SCM_RIGHTS;\n cmsg-\u003ecmsg_len \u003d CMSG_LEN (sizeof (int));\n\n msg.msg_controllen \u003d cmsg-\u003ecmsg_len;\n\n pid_t child \u003d fork ();\n if (child \u003d\u003d -1)\n error (1, errno, \"fork\");\n if (child \u003d\u003d 0)\n {\n int sock \u003d socket (PF_UNIX, SOCK_STREAM, 0);\n if (sock \u003c 0)\n error (1, errno, \"socket\");\n\n if (bind (sock, (struct sockaddr *) \u0026sun, sizeof (sun)) \u003c 0)\n error (1, errno, \"bind\");\n if (listen (sock, SOMAXCONN) \u003c 0)\n error (1, errno, \"listen\");\n\n int conn \u003d accept (sock, NULL, NULL);\n if (conn \u003d\u003d -1)\n error (1, errno, \"accept\");\n\n *(int *) CMSG_DATA (cmsg) \u003d sock;\n if (sendmsg (conn, \u0026msg, MSG_NOSIGNAL) \u003c 0)\n error (1, errno, \"sendmsg\");\n\n return 0;\n }\n\n /* For a test suite this should be more robust like a\n barrier in shared memory. */\n sleep (1);\n\n int sock \u003d socket (PF_UNIX, SOCK_STREAM, 0);\n if (sock \u003c 0)\n error (1, errno, \"socket\");\n\n if (connect (sock, (struct sockaddr *) \u0026sun, sizeof (sun)) \u003c 0)\n error (1, errno, \"connect\");\n unlink (sun.sun_path);\n\n *(int *) CMSG_DATA (cmsg) \u003d -1;\n\n if (recvmsg (sock, \u0026msg, MSG_CMSG_CLOEXEC) \u003c 0)\n error (1, errno, \"recvmsg\");\n\n int fd \u003d *(int *) CMSG_DATA (cmsg);\n if (fd \u003d\u003d -1)\n error (1, 0, \"no descriptor received\");\n\n char fdname[20];\n snprintf (fdname, sizeof (fdname), \"%d\", fd);\n execl (\"/proc/self/exe\", argv[0], fdname, NULL);\n puts (\"execl failed\");\n return 1;\n}\n\n[akpm@linux-foundation.org: Fix fastcall inconsistency noted by Michael Buesch]\n[akpm@linux-foundation.org: build fix]\nSigned-off-by: Ulrich Drepper \u003cdrepper@redhat.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Michael Buesch \u003cmb@bu3sch.de\u003e\nCc: Michael Kerrisk \u003cmtk-manpages@gmx.net\u003e\nAcked-by: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "01b2d93ca4c495f056471189ac6c4e6ac4cbbccb", "tree": "86aa1aabae8207e693e31ee68b526376388a36a3", "parents": [ "31fccf7fe4097e62f038bdfe8f4f68ecaea8ebe7" ], "author": { "name": "Vadim Lobanov", "email": "vlobanov@speakeasy.net", "time": "Fri Dec 22 01:10:43 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Fri Dec 22 08:55:50 2006 -0800" }, "message": "[PATCH] fdtable: Provide free_fdtable() wrapper\n\nChristoph Hellwig has expressed concerns that the recent fdtable changes\nexpose the details of the RCU methodology used to release no-longer-used\nfdtable structures to the rest of the kernel. The trivial patch below\naddresses these concerns by introducing the appropriate free_fdtable()\ncalls, which simply wrap the release RCU usage. Since free_fdtable() is a\none-liner, it makes sense to promote it to an inline helper.\n\nSigned-off-by: Vadim Lobanov \u003cvlobanov@speakeasy.net\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "5466b456ed6748e0bfe02831e570004d4c04c1d7", "tree": "90afd9e5142edb8f9a6facee7258ed2c556a6d9b", "parents": [ "4fd45812cbe875a620c86a096a5d46c742694b7e" ], "author": { "name": "Vadim Lobanov", "email": "vlobanov@speakeasy.net", "time": "Sun Dec 10 02:21:22 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Sun Dec 10 09:57:22 2006 -0800" }, "message": "[PATCH] fdtable: Implement new pagesize-based fdtable allocator\n\nThis patch provides an improved fdtable allocation scheme, useful for\nexpanding fdtable file descriptor entries. The main focus is on the fdarray,\nas its memory usage grows 128 times faster than that of an fdset.\n\nThe allocation algorithm sizes the fdarray in such a way that its memory usage\nincreases in easy page-sized chunks. The overall algorithm expands the allowed\nsize in powers of two, in order to amortize the cost of invoking vmalloc() for\nlarger allocation sizes. Namely, the following sizes for the fdarray are\nconsidered, and the smallest that accommodates the requested fd count is\nchosen:\n\n pagesize / 4\n pagesize / 2\n pagesize \u003c- memory allocator switch point\n pagesize * 2\n pagesize * 4\n ...etc...\n\nUnlike the current implementation, this allocation scheme does not require a\nloop to compute the optimal fdarray size, and can be done in efficient\nstraightline code.\n\nFurthermore, since the fdarray overflows the pagesize boundary long before any\nof the fdsets do, it makes sense to optimize run-time by allocating both\nfdsets in a single swoop. Even together, they will still be, by far, smaller\nthan the fdarray. The fdtable-\u003eopen_fds is now used as the anchor for the\nfdset memory allocation.\n\nSigned-off-by: Vadim Lobanov \u003cvlobanov@speakeasy.net\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4fd45812cbe875a620c86a096a5d46c742694b7e", "tree": "8d2c99caa718da6cda87229076adf708494ff251", "parents": [ "bbea9f69668a3d0cf9feba15a724cd02896f8675" ], "author": { "name": "Vadim Lobanov", "email": "vlobanov@speakeasy.net", "time": "Sun Dec 10 02:21:17 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Sun Dec 10 09:57:22 2006 -0800" }, "message": "[PATCH] fdtable: Remove the free_files field\n\nAn fdtable can either be embedded inside a files_struct or standalone (after\nbeing expanded). When an fdtable is being discarded after all RCU references\nto it have expired, we must either free it directly, in the standalone case,\nor free the files_struct it is contained within, in the embedded case.\n\nCurrently the free_files field controls this behavior, but we can get rid of\nit entirely, as all the necessary information is already recorded. We can\ndistinguish embedded and standalone fdtables using max_fds, and if it is\nembedded we can divine the relevant files_struct using container_of().\n\nSigned-off-by: Vadim Lobanov \u003cvlobanov@speakeasy.net\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "bbea9f69668a3d0cf9feba15a724cd02896f8675", "tree": "bc58506e4daba4a04309181a5501ae4eb5424783", "parents": [ "f3d19c90fb117a5f080310a4592929aa8e1ad8e9" ], "author": { "name": "Vadim Lobanov", "email": "vlobanov@speakeasy.net", "time": "Sun Dec 10 02:21:12 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Sun Dec 10 09:57:22 2006 -0800" }, "message": "[PATCH] fdtable: Make fdarray and fdsets equal in size\n\nCurrently, each fdtable supports three dynamically-sized arrays of data: the\nfdarray and two fdsets. The code allows the number of fds supported by the\nfdarray (fdtable-\u003emax_fds) to differ from the number of fds supported by each\nof the fdsets (fdtable-\u003emax_fdset).\n\nIn practice, it is wasteful for these two sizes to differ: whenever we hit a\nlimit on the smaller-capacity structure, we will reallocate the entire fdtable\nand all the dynamic arrays within it, so any delta in the memory used by the\nlarger-capacity structure will never be touched at all.\n\nRather than hogging this excess, we shouldn\u0027t even allocate it in the first\nplace, and keep the capacities of the fdarray and the fdsets equal. This\npatch removes fdtable-\u003emax_fdset. As an added bonus, most of the supporting\ncode becomes simpler.\n\nSigned-off-by: Vadim Lobanov \u003cvlobanov@speakeasy.net\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "8b7d91eb7f6a3e8f0caaa613937bda5ab7dc7dc2", "tree": "8036dc7f0c05ec2712acfed92589bd41ed5766f9", "parents": [ "5d6538fcf231faccb2ac42f92851d259d00e62f9" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Dec 06 20:32:52 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:23 2006 -0800" }, "message": "[PATCH] Move filep_cachep to include/file.h\n\nfilp_cachep is only used in fs/file_table.c and in fs/dcache.c where\nit is defined.\n\nMove it to related definitions in linux/file.h.\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": "5d6538fcf231faccb2ac42f92851d259d00e62f9", "tree": "6ccf2d0755d32d5049d365a7f30c13240030585f", "parents": [ "c43692e85f306667545b91194c748a6e46c1f8b4" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Dec 06 20:32:50 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:22 2006 -0800" }, "message": "[PATCH] Move files_cachep to include/file.h\n\nProper place is in file.h since files_cachep uses are rated to file I/O.\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": "3b9b8ab65d8eed784b9164d03807cb2bda7b5cd6", "tree": "104c7b01768acd7e152cbf66e4868a73804e8af9", "parents": [ "fc09561d6392771a392dea55c287de7e849b6b63" ], "author": { "name": "Kirill Korotaev", "email": "dev@sw.ru", "time": "Fri Sep 29 02:00:05 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Sep 29 09:18:12 2006 -0700" }, "message": "[PATCH] Fix unserialized task-\u003efiles changing\n\nFixed race on put_files_struct on exec with proc. Restoring files on\ncurrent on error path may lead to proc having a pointer to already kfree-d\nfiles_struct.\n\n-\u003efiles changing at exit.c and khtread.c are safe as exit_files() makes all\nthings under lock.\n\nFound during OpenVZ stress testing.\n\n[akpm@osdl.org: add export]\nSigned-off-by: Pavel Emelianov \u003cxemul@openvz.org\u003e\nSigned-off-by: Kirill Korotaev \u003cdev@openvz.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "0c9e63fd38a2fb2181668a0cdd622a3c23cfd567", "tree": "8fdb91603347b1da2e83a095ebcaab44b2c3c237", "parents": [ "d8733c2956968a01394a4d2a9e97a8b431a78776" ], "author": { "name": "Eric Dumazet", "email": "dada1@cosmosbay.com", "time": "Thu Mar 23 03:00:12 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 23 07:38:09 2006 -0800" }, "message": "[PATCH] Shrinks sizeof(files_struct) and better layout\n\n1) Reduce the size of (struct fdtable) to exactly 64 bytes on 32bits\n platforms, lowering kmalloc() allocated space by 50%.\n\n2) Reduce the size of (files_struct), using a special 32 bits (or\n 64bits) embedded_fd_set, instead of a 1024 bits fd_set for the\n close_on_exec_init and open_fds_init fields. This save some ram (248\n bytes per task) as most tasks dont open more than 32 files. D-Cache\n footprint for such tasks is also reduced to the minimum.\n\n3) Reduce size of allocated fdset. Currently two full pages are\n allocated, that is 32768 bits on x86 for example, and way too much. The\n minimum is now L1_CACHE_BYTES.\n\nUP and SMP should benefit from this patch, because most tasks will touch\nonly one cache line when open()/close() stdin/stdout/stderr (0/1/2),\n(next_fd, close_on_exec_init, open_fds_init, fd_array[0 .. 2] being in the\nsame cache line)\n\nSigned-off-by: Eric Dumazet \u003cdada1@cosmosbay.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "529bf6be5c04f2e869d07bfdb122e9fd98ade714", "tree": "38514bb3941c4ac2a79266e4483663b79efa2f22", "parents": [ "21a1ea9eb40411d4ee29448c53b9e4c0654d6ceb" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Tue Mar 07 21:55:35 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Mar 08 14:14:01 2006 -0800" }, "message": "[PATCH] fix file counting\n\nI have benchmarked this on an x86_64 NUMA system and see no significant\nperformance difference on kernbench. Tested on both x86_64 and powerpc.\n\nThe way we do file struct accounting is not very suitable for batched\nfreeing. For scalability reasons, file accounting was\nconstructor/destructor based. This meant that nr_files was decremented\nonly when the object was removed from the slab cache. This is susceptible\nto slab fragmentation. With RCU based file structure, consequent batched\nfreeing and a test program like Serge\u0027s, we just speed this up and end up\nwith a very fragmented slab -\n\nllm22:~ # cat /proc/sys/fs/file-nr\n587730 0 758844\n\nAt the same time, I see only a 2000+ objects in filp cache. The following\npatch I fixes this problem.\n\nThis patch changes the file counting by removing the filp_count_lock.\nInstead we use a separate percpu counter, nr_files, for now and all\naccesses to it are through get_nr_files() api. In the sysctl handler for\nnr_files, we populate files_stat.nr_files before returning to user.\n\nCounting files as an when they are created and destroyed (as opposed to\ninside slab) allows us to correctly count open files with RCU.\n\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "95e861db3eaba7bc99f8605db70103ec3d078203", "tree": "70f86b1acf1c8b1fb49f8bd11aaf5d81c39d0e97", "parents": [ "d6c7ac081bf6cafcf780b919ee97978f1d01a0d7" ], "author": { "name": "Eric Dumazet", "email": "dada1@cosmosbay.com", "time": "Sun Nov 13 16:06:24 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Nov 13 18:14:10 2005 -0800" }, "message": "[PATCH] reorder struct files_struct\n\nThe file_lock spinlock sits close to mostly read fields of \u0027struct\nfiles_struct\u0027\n\nIn SMP (and NUMA) environments, each time a thread wants to open or close\na file, it has to acquire the spinlock, thus invalidating the cache line\ncontaining this spinlock on other CPUS. So other threads doing\nread()/write()/... calls that use RCU to access the file table are going\nto ask further memory (possibly NUMA) transactions to read again this\nmemory line.\n\nMove the spinlock to another cache line, so that concurrent threads can\nshare the cache line containing \u0027count\u0027 and \u0027fdt\u0027 fields.\n\nIt\u0027s worth up to 9% on a microbenchmark using a 4-thread 2-package x86\nmachine. See\nhttp://marc.theaimsgroup.com/?l\u003dlinux-kernel\u0026m\u003d112680448713342\u0026w\u003d2\n\nSigned-off-by: Eric Dumazet \u003cdada1@cosmosbay.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "2109a2d1b175dfcffbfdac693bdbe4c4ab62f11f", "tree": "07b47953a74adaa7490ef24aab10c45a5a4148a6", "parents": [ "4f12bb4f7715f418a9c80f89447948790f476958" ], "author": { "name": "Pekka J Enberg", "email": "penberg@cs.Helsinki.FI", "time": "Mon Nov 07 00:58:01 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 07 07:53:24 2005 -0800" }, "message": "[PATCH] mm: rename kmem_cache_s to kmem_cache\n\nThis patch renames struct kmem_cache_s to kmem_cache so we can start using\nit instead of kmem_cache_t typedef.\n\nSigned-off-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "ab2af1f5005069321c5d130f09cce577b03f43ef", "tree": "73a70ba486f522cd9eeeef376ede2b5a1c1b473b", "parents": [ "6e72ad2c581de121cc7e772469e2a8f6b1fd4379" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Fri Sep 09 13:04:13 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Sep 09 13:57:55 2005 -0700" }, "message": "[PATCH] files: files struct with RCU\n\nPatch to eliminate struct files_struct.file_lock spinlock on the reader side\nand use rcu refcounting rcuref_xxx api for the f_count refcounter. The\nupdates to the fdtable are done by allocating a new fdtable structure and\nsetting files-\u003efdt to point to the new structure. The fdtable structure is\nprotected by RCU thereby allowing lock-free lookup. For fd arrays/sets that\nare vmalloced, we use keventd to free them since RCU callbacks can\u0027t sleep. A\nglobal list of fdtable to be freed is not scalable, so we use a per-cpu list.\nIf keventd is already handling the current cpu\u0027s work, we use a timer to defer\nqueueing of that work.\n\nSince the last publication, this patch has been re-written to avoid using\nexplicit memory barriers and use rcu_assign_pointer(), rcu_dereference()\npremitives instead. This required that the fd information is kept in a\nseparate structure (fdtable) and updated atomically.\n\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "badf16621c1f9d1ac753be056fce11b43d6e0be5", "tree": "3fdf833fdf2e3d3a439090743539680449ec3428", "parents": [ "c0dfb2905126e9e94edebbce8d3e05001301f52d" ], "author": { "name": "Dipankar Sarma", "email": "dipankar@in.ibm.com", "time": "Fri Sep 09 13:04:10 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Sep 09 13:57:55 2005 -0700" }, "message": "[PATCH] files: break up files struct\n\nIn order for the RCU to work, the file table array, sets and their sizes must\nbe updated atomically. Instead of ensuring this through too many memory\nbarriers, we put the arrays and their sizes in a separate structure. This\npatch takes the first step of putting the file table elements in a separate\nstructure fdtable that is embedded withing files_struct. It also changes all\nthe users to refer to the file table using files_fdtable() macro. Subsequent\napplciation of RCU becomes easier after this.\n\nSigned-off-by: Dipankar Sarma \u003cdipankar@in.ibm.com\u003e\nSigned-Off-By: David Howells \u003cdhowells@redhat.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" } ] }