)]}'
{
  "log": [
    {
      "commit": "ab780f1ece0dc8d5e8e8e85435acc5e4747ccda3",
      "tree": "4085b6c929a44de229eb5ef13fa2079211ea5512",
      "parents": [
        "c7c22e4d5c1fdebfac4dba76de7d0338c2b0d832"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Aug 26 10:25:02 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:09 2008 +0200"
      },
      "message": "block: inherit CPU completion on bio-\u003erq and rq-\u003erq merges\n\nSomewhat incomplete, as we do allow merges of requests and bios\nthat have different completion CPUs given. This is done on the\nassumption that a larger IO is still more beneficial than CPU\nlocality.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "074a7aca7afa6f230104e8e65eba3420263714a5",
      "tree": "f418313e45bd55be8156c8a3e8f9a216cf63058d",
      "parents": [
        "eddb2e26b5ee3c5da68ba4bf1921ba20e2097bff"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Aug 25 19:56:14 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:08 2008 +0200"
      },
      "message": "block: move stats from disk to part0\n\nMove stats related fields - stamp, in_flight, dkstats - from disk to\npart0 and unify stat handling such that...\n\n* part_stat_*() now updates part0 together if the specified partition\n  is not part0.  ie. part_stat_*() are now essentially all_stat_*().\n\n* {disk|all}_stat_*() are gone.\n\n* part_round_stats() is updated similary.  It handles part0 stats\n  automatically and disk_round_stats() is killed.\n\n* part_{inc|dec}_in_fligh() is implemented which automatically updates\n  part0 stats for parts other than part0.\n\n* disk_map_sector_rcu() is updated to return part0 if no part matches.\n  Combined with the above changes, this makes NULL special case\n  handling in callers unnecessary.\n\n* Separate stats show code paths for disk are collapsed into part\n  stats show code paths.\n\n* Rename disk_stat_lock/unlock() to part_stat_lock/unlock()\n\nWhile at it, reposition stat handling macros a bit and add missing\nparentheses around macro parameters.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "c9959059161ddd7bf4670cf47367033d6b2f79c4",
      "tree": "6454db55f8e34361fe472358e10e0c5cfac1e366",
      "parents": [
        "e71bf0d0ee89e51b92776391c5634938236977d5"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Aug 25 19:47:21 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:06 2008 +0200"
      },
      "message": "block: fix diskstats access\n\nThere are two variants of stat functions - ones prefixed with double\nunderbars which don\u0027t care about preemption and ones without which\ndisable preemption before manipulating per-cpu counters.  It\u0027s unclear\nwhether the underbarred ones assume that preemtion is disabled on\nentry as some callers don\u0027t do that.\n\nThis patch unifies diskstats access by implementing disk_stat_lock()\nand disk_stat_unlock() which take care of both RCU (for partition\naccess) and preemption (for per-cpu counter access).  diskstats access\nshould always be enclosed between the two functions.  As such, there\u0027s\nno need for the versions which disables preemption.  They\u0027re removed\nand double underbars ones are renamed to drop the underbars.  As an\nextra argument is added, there\u0027s no danger of using the old version\nunconverted.\n\ndisk_stat_lock() uses get_cpu() and returns the cpu index and all\ndiskstat functions which access per-cpu counters now has @cpu\nargument to help RT.\n\nThis change adds RCU or preemption operations at some places but also\ncollapses several preemption ops into one at others.  Overall, the\nperformance difference should be negligible as all involved ops are\nvery lightweight per-cpu ones.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "e71bf0d0ee89e51b92776391c5634938236977d5",
      "tree": "9fc62352a40ad388deebdd8ed497cab926cf0470",
      "parents": [
        "f331c0296f2a9fee0d396a70598b954062603015"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Wed Sep 03 09:03:02 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:06 2008 +0200"
      },
      "message": "block: fix disk-\u003epart[] dereferencing race\n\ndisk-\u003epart[] is protected by its matching bdev\u0027s lock.  However,\nnon-critical accesses like collecting stats and printing out sysfs and\nproc information used to be performed without any locking.  As\npartitions can come and go dynamically, partitions can go away\nunderneath those non-critical accesses.  As some of those accesses are\nwrites, this theoretically can lead to silent corruption.\n\nThis patch fixes the race by using RCU for the partition array and dev\nreference counter to hold partitions.\n\n* Rename disk-\u003epart[] to disk-\u003e__part[] to make sure no one outside\n  genhd layer proper accesses it directly.\n\n* Use RCU for disk-\u003e__part[] dereferencing.\n\n* Implement disk_{get|put}_part() which can be used to get and put\n  partitions from gendisk respectively.\n\n* Iterators are implemented to help iterate through all partitions\n  safely.\n\n* Functions which require RCU readlock are marked with _rcu suffix.\n\n* Use disk_put_part() in __blkdev_put() instead of directly putting\n  the contained kobject.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "310a2c1012934f590192377f65940cad4aa72b15",
      "tree": "ed30346abf07c5a7e94719f567368d5642af1f95",
      "parents": [
        "88e341261ca4d39eec21b212961c77eff51105f7"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Aug 25 19:47:17 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:04 2008 +0200"
      },
      "message": "block: misc updates\n\nThis patch makes the following misc updates in preparation for\ndisk-\u003epart dereference fix and extended block devt support.\n\n* implment part_to_disk()\n\n* fix comment about gendisk-\u003epart indexing\n\n* rename get_part() to disk_map_sector()\n\n* don\u0027t use n which is always zero while printing disk information in\n  diskstats_show()\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "5df97b91b5d7ed426034fcc84cb6e7cf682b8838",
      "tree": "727b9fb778f72d2b1ff44c007fb5209bacf67f4a",
      "parents": [
        "b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5"
      ],
      "author": {
        "name": "Mikulas Patocka",
        "email": "mpatocka@redhat.com",
        "time": "Fri Aug 15 10:20:02 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:03 2008 +0200"
      },
      "message": "drop vmerge accounting\n\nRemove hw_segments field from struct bio and struct request. Without virtual\nmerge accounting they have no purpose.\n\nSigned-off-by: Mikulas Patocka \u003cmpatocka@redhat.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5",
      "tree": "5832535c112c0504590256cb8a0bcabc6e282be3",
      "parents": [
        "6a421c1dc94b12923294a359822346f12492de5e"
      ],
      "author": {
        "name": "Mikulas Patocka",
        "email": "mpatocka@redhat.com",
        "time": "Fri Aug 15 10:15:19 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:03 2008 +0200"
      },
      "message": "block: drop virtual merging accounting\n\nRemove virtual merge accounting.\n\nSigned-off-by: Mikulas Patocka \u003cmpatocka@redhat.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "e17fc0a1ccf88f6d4dcb363729f3141b0958c325",
      "tree": "0a7c2dc1c3159c2af14d87c67ca83e158b2c78b5",
      "parents": [
        "d30a2605be9d5132d95944916e8f578fcfe4f976"
      ],
      "author": {
        "name": "David Woodhouse",
        "email": "David.Woodhouse@intel.com",
        "time": "Sat Aug 09 16:42:20 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:02 2008 +0200"
      },
      "message": "Allow elevators to sort/merge discard requests\n\nBut blkdev_issue_discard() still emits requests which are interpreted as\nsoft barriers, because naïve callers might otherwise issue subsequent\nwrites to those same sectors, which might cross on the queue (if they\u0027re\nreallocated quickly enough).\n\nCallers still _can_ issue non-barrier discard requests, but they have to\ntake care of queue ordering for themselves.\n\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "7ba1ba12eeef0aa7113beb16410ef8b7c748e18b",
      "tree": "4629aabe88bf095d58eabd2f451207695bb35b08",
      "parents": [
        "51d654e1d885607a6edd02b337105fa5c28b6d33"
      ],
      "author": {
        "name": "Martin K. Petersen",
        "email": "martin.petersen@oracle.com",
        "time": "Mon Jun 30 20:04:41 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Jul 03 13:21:13 2008 +0200"
      },
      "message": "block: Block layer data integrity support\n\nSome block devices support verifying the integrity of requests by way\nof checksums or other protection information that is submitted along\nwith the I/O.\n\nThis patch implements support for generating and verifying integrity\nmetadata, as well as correctly merging, splitting and cloning bios and\nrequests that have this extra information attached.\n\nSee Documentation/block/data-integrity.txt for more information.\n\nSigned-off-by: Martin K. Petersen \u003cmartin.petersen@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "2cdf79cafbd11580f5b63cd4993b45c1c4952415",
      "tree": "c0f4b7eea00127675785174a79ff0ac4c6d2669a",
      "parents": [
        "7f3d4ee108c184ab215036051087aaaaa8de7661"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Wed May 07 09:33:55 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Wed May 07 09:33:55 2008 +0200"
      },
      "message": "block: get rid of likely/unlikely predictions in merge logic\n\nThey tend to depend a lot on the workload, so not a clear-cut\nlikely or unlikely fit.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "75ad23bc0fcb4f992a5d06982bf0857ab1738e9e",
      "tree": "8668ef63b1f420252ae41aed9e13737d49fd8054",
      "parents": [
        "68154e90c9d1492d570671ae181d9a8f8530da55"
      ],
      "author": {
        "name": "Nick Piggin",
        "email": "npiggin@suse.de",
        "time": "Tue Apr 29 14:48:33 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Apr 29 14:48:33 2008 +0200"
      },
      "message": "block: make queue flags non-atomic\n\nWe can save some atomic ops in the IO path, if we clearly define\nthe rules of how to modify the queue flags.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "f18573abcc57844a7c3c12699d40eead8728cd8a",
      "tree": "99d5dcfdfe29578bb23900e63f226022f5e87281",
      "parents": [
        "afdc1a780ef84a54b613dae6f971407748aab61c"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Fri Apr 11 12:56:52 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Mon Apr 21 09:50:08 2008 +0200"
      },
      "message": "block: move the padding adjustment to blk_rq_map_sg\n\nblk_rq_map_user adjusts bi_size of the last bio. It breaks the rule\nthat req-\u003edata_len (the true data length) is equal to sum(bio). It\nbroke the scsi command completion code.\n\ncommit e97a294ef6938512b655b1abf17656cf2b26f709 was introduced to fix\nthe above issue. However, the partial completion code doesn\u0027t work\nwith it. The commit is also a layer violation (scsi mid-layer should\nnot know about the block layer\u0027s padding).\n\nThis patch moves the padding adjustment to blk_rq_map_sg (suggested by\nJames). The padding works like the drain buffer. This patch breaks the\nrule that req-\u003edata_len is equal to sum(sg), however, the drain buffer\nalready broke it. So this patch just restores the rule that\nreq-\u003edata_len is equal to sub(bio) without breaking anything new.\n\nNow when a low level driver needs padding, blk_rq_map_user and\nblk_rq_map_user_iov guarantee there\u0027s enough room for padding.\nblk_rq_map_sg can safely extend the last entry of a scatter list.\n\nblk_rq_map_sg must extend the last entry of a scatter list only for a\nrequest that got through bio_copy_user_iov. This patches introduces\nnew REQ_COPY_USER flag.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Tejun Heo \u003chtejun@gmail.com\u003e\nCc: Mike Christie \u003cmichaelc@cs.wisc.edu\u003e\nCc: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "7a85f8896f4b4a4a0249563b92af9e3161a6b467",
      "tree": "616c62e3c96237e874fc0f47133fbca2160913b5",
      "parents": [
        "89b6e743788516491846724d7ef89bcac7ac9c99"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Tue Mar 04 11:17:11 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "axboe@carl.home.kernel.dk",
        "time": "Tue Mar 04 11:17:11 2008 +0100"
      },
      "message": "block: restore the meaning of rq-\u003edata_len to the true data length\n\nThe meaning of rq-\u003edata_len was changed to the length of an allocated\nbuffer from the true data length. It breaks SG_IO friends and\nbsg. This patch restores the meaning of rq-\u003edata_len to the true data\nlength and adds rq-\u003eextra_len to store an extended length (due to\ndrain buffer and padding).\n\nThis patch also removes the code to update bio in blk_rq_map_user\nintroduced by the commit 40b01b9bbdf51ae543a04744283bf2d56c4a6afa.\nThe commit adjusts bio according to memory alignment\n(queue_dma_alignment). However, memory alignment is NOT padding\nalignment. This adjustment also breaks SG_IO friends and bsg. Padding\nalignment needs to be fixed in a proper way (by a separate patch).\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nSigned-off-by: Jens Axboe \u003caxboe@carl.home.kernel.dk\u003e\n"
    },
    {
      "commit": "db0a2e0099be3a1cff55879225881465f16c67d3",
      "tree": "297f788296f1722b4a6b2e5947fa9a3aa63dc36b",
      "parents": [
        "2fb98e8414c42cb14698833aac640b143b9ade4f"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "htejun@gmail.com",
        "time": "Tue Feb 19 11:36:55 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Feb 19 11:36:55 2008 +0100"
      },
      "message": "block: clear drain buffer if draining for write command\n\nClear drain buffer before chaining if the command in question is a\nwrite.\n\nSigned-off-by: Tejun Heo \u003chtejun@gmail.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "2fb98e8414c42cb14698833aac640b143b9ade4f",
      "tree": "ab241305b5ce3ea5ef3e76df7abe04b831cd9e34",
      "parents": [
        "6b00769fe1502b4ad97bb327ef7ac971b208bfb5"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "htejun@gmail.com",
        "time": "Tue Feb 19 11:36:53 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Feb 19 11:36:53 2008 +0100"
      },
      "message": "block: implement request_queue-\u003edma_drain_needed\n\nDraining shouldn\u0027t be done for commands where overflow may indicate\ndata integrity issues.  Add dma_drain_needed callback to\nrequest_queue.  Drain buffer is appened iff this function returns\nnon-zero.\n\nSigned-off-by: Tejun Heo \u003chtejun@gmail.com\u003e\nCc: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "6b00769fe1502b4ad97bb327ef7ac971b208bfb5",
      "tree": "2ffc51176437ebf4f8a4ab13de59a32431043f15",
      "parents": [
        "40b01b9bbdf51ae543a04744283bf2d56c4a6afa"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "htejun@gmail.com",
        "time": "Tue Feb 19 11:36:35 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Feb 19 11:36:35 2008 +0100"
      },
      "message": "block: add request-\u003eraw_data_len\n\nWith padding and draining moved into it, block layer now may extend\nrequests as directed by queue parameters, so now a request has two\nsizes - the original request size and the extended size which matches\nthe size of area pointed to by bios and later by sgs.  The latter size\nis what lower layers are primarily interested in when allocating,\nfilling up DMA tables and setting up the controller.\n\nBoth padding and draining extend the data area to accomodate\ncontroller characteristics.  As any controller which speaks SCSI can\nhandle underflows, feeding larger data area is safe.\n\nSo, this patch makes the primary data length field, request-\u003edata_len,\nindicate the size of full data area and add a separate length field,\nrequest-\u003eraw_data_len, for the unmodified request size.  The latter is\nused to report to higher layer (userland) and where the original\nrequest size should be fed to the controller or device.\n\nSigned-off-by: Tejun Heo \u003chtejun@gmail.com\u003e\nCc: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "6f2576af5ba5913538fda7dfb7c6a17771025477",
      "tree": "ff55bc30686ccec8b0ce22eb3844e78a52aea875",
      "parents": [
        "ea5c48ab2a76559d4af39e1f7de137c0851ac0a5"
      ],
      "author": {
        "name": "Jerome Marchand",
        "email": "jmarchan@redhat.com",
        "time": "Fri Feb 08 11:04:35 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Fri Feb 08 12:41:56 2008 +0100"
      },
      "message": "Enhanced partition statistics: update partition statitics\n\nUpdates the enhanced partition statistics in generic block layer\nbesides the disk statistics.\n\nSigned-off-by: Jerome Marchand \u003cjmarchan@redhat.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "6728cb0e6343d4068ccec13f07212e6382d3ff33",
      "tree": "5a7826dc91cf2d9cf54e8c24b40aa3c4d892c797",
      "parents": [
        "22b132102f1540dd40f3e41df88796829b685f1a"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Jan 31 13:03:55 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Fri Feb 01 09:26:33 2008 +0100"
      },
      "message": "block: make core bits checkpatch compliant\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "d6d48196961729b79509dcaeeb0f0fb4fbb47d29",
      "tree": "e80f5cdc7f0d682a46b816f5a489357f7d622d62",
      "parents": [
        "db1d08c646e47f3c7835ecdabb51a906ec311f69"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Jan 29 14:04:06 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Jan 29 21:55:12 2008 +0100"
      },
      "message": "block: ll_rw_blk.c split, add blk-merge.c\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    }
  ]
}