)]}' { "log": [ { "commit": "4b6f5d20b04dcbc3d888555522b90ba6d36c4106", "tree": "420f271eaef7d3def7d4433b151c3cb6d7a54770", "parents": [ "99ac48f54a91d02140c497edc31dc57d4bc5c85d" ], "author": { "name": "Arjan van de Ven", "email": "arjan@infradead.org", "time": "Tue Mar 28 01:56:42 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Mar 28 09:16:06 2006 -0800" }, "message": "[PATCH] Make most file operations structs in fs/ const\n\nThis is a conversion to make the various file_operations structs in fs/\nconst. Basically a regexp job, with a few manual fixups\n\nThe goal is both to increase correctness (harder to accidentally write to\nshared datastructures) and reducing the false sharing of cachelines with\nthings that get dirty in .data (while .rodata is nicely read only and thus\ncache clean)\n\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": "89747d369d34e333b9b60f10f333a0b727b4e4e2", "tree": "26b55849e666c7f6c7a7312b100756c3b591559f", "parents": [ "e2d53f9525790dfacbcf09f359536311d3913d98" ], "author": { "name": "Mingming Cao", "email": "cmm@us.ibm.com", "time": "Sun Mar 26 01:37:55 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Mar 26 08:57:00 2006 -0800" }, "message": "[PATCH] ext3_get_blocks: Mapping multiple blocks at a once\n\nCurrently ext3_get_block() only maps or allocates one block at a time. This\nis quite inefficient for sequential IO workload.\n\nI have posted a early implements a simply multiple block map and allocation\nwith current ext3. The basic idea is allocating the 1st block in the existing\nway, and attempting to allocate the next adjacent blocks on a best effort\nbasis. More description about the implementation could be found here:\nhttp://marc.theaimsgroup.com/?l\u003dext2-devel\u0026m\u003d112162230003522\u0026w\u003d2\n\nThe following the latest version of the patch: break the original patch into 5\npatches, re-worked some logicals, and fixed some bugs. The break ups are:\n\n [patch 1] Adding map multiple blocks at a time in ext3_get_blocks()\n [patch 2] Extend ext3_get_blocks() to support multiple block allocation\n [patch 3] Implement multiple block allocation in ext3-try-to-allocate\n (called via ext3_new_block()).\n [patch 4] Proper accounting updates in ext3_new_blocks()\n [patch 5] Adjust reservation window size properly (by the given number\n of blocks to allocate) before block allocation to increase the\n possibility of allocating multiple blocks in a single call.\n\nTests done so far includes fsx,tiobench and dbench. The following numbers\ncollected from Direct IO tests (1G file creation/read) shows the system time\nhave been greatly reduced (more than 50% on my 8 cpu system) with the patches.\n\n 1G file DIO write:\n \t2.6.15\t\t2.6.15+patches\n real 0m31.275s\t0m31.161s\n user 0m0.000s\t0m0.000s\n sys 0m3.384s\t0m0.564s\n\n 1G file DIO read:\n \t2.6.15\t\t2.6.15+patches\n real 0m30.733s\t0m30.624s\n user 0m0.000s\t0m0.004s\n sys 0m0.748s\t0m0.380s\n\nSome previous test we did on buffered IO with using multiple blocks allocation\nand delayed allocation shows noticeable improvement on throughput and system\ntime.\n\nThis patch:\n\nAdd support of mapping multiple blocks in one call.\n\nThis is useful for DIO reads and re-writes (where blocks are already\nallocated), also is in line with Christoph\u0027s proposal of using getblocks() in\nmpage_readpage() or mpage_readpages().\n\nSigned-off-by: Mingming Cao \u003ccmm@us.ibm.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "d8733c2956968a01394a4d2a9e97a8b431a78776", "tree": "9743c9020eb5193efa4a0f102b3a7eb1d999c4fd", "parents": [ "b8e31edc10d160a8bf2159541d9d12f2079a0887" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Thu Mar 23 03:00:11 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Mar 23 07:38:09 2006 -0800" }, "message": "[PATCH] ext3_readdir: use generic readahead\n\nLinus points out that ext3_readdir\u0027s readahead only cuts in when\next3_readdir() is operating at the very start of the directory. So for large\ndirectories we end up performing no readahead at all and we suck.\n\nSo take it all out and use the core VM\u0027s page_cache_readahead(). This means\nthat ext3 directory reads will use all of readahead\u0027s dynamic sizing goop.\n\nNote that we\u0027re using the directory\u0027s filp-\u003ef_ra to hold the readahead state,\nbut readahead is actually being performed against the underlying blockdev\u0027s\naddress_space. Fortunately the readahead code is all set up to handle this.\n\nTested with printk. It works. I was struggling to find a real workload which\nactually cared.\n\n(The patch also exports page_cache_readahead() to GPL modules)\n\nCc: \"Stephen C. Tweedie\" \u003csct@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" } ] }