)]}'
{
  "log": [
    {
      "commit": "ae03bf639a5027d27270123f5f6e3ee6a412781d",
      "tree": "d705f41a188ad656b1f47f7952626a9f992e3b8f",
      "parents": [
        "e1defc4ff0cf57aca6c5e3ff99fa503f5943c1f1"
      ],
      "author": {
        "name": "Martin K. Petersen",
        "email": "martin.petersen@oracle.com",
        "time": "Fri May 22 17:17:50 2009 -0400"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Fri May 22 23:22:54 2009 +0200"
      },
      "message": "block: Use accessor functions for queue limits\n\nConvert all external users of queue limits to using wrapper functions\ninstead of poking the request queue variables directly.\n\nSigned-off-by: Martin K. Petersen \u003cmartin.petersen@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "a411f4bbb89f1f08687b344064d6775bce1e4658",
      "tree": "8898f98285e712f8b5bb99db184bc1a21b1a643c",
      "parents": [
        "c29b70f6ee4f2fa3ef07f55bc9082945861e5391"
      ],
      "author": {
        "name": "Boaz Harrosh",
        "email": "bharrosh@panasas.com",
        "time": "Sun May 17 19:00:01 2009 +0300"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue May 19 12:14:56 2009 +0200"
      },
      "message": "block: Un-export blk_rq_append_bio\n\nOSD was the last in-tree user of blk_rq_append_bio(). Now\nthat it is fixed blk_rq_append_bio is un-exported and\nis only used internally by block layer.\n\nSigned-off-by: Boaz Harrosh \u003cbharrosh@panasas.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "3a5a39276d2a32b05b1ee25b384516805b17cf87",
      "tree": "8a52a4a158ed341b7c3049826c549c2a210386e3",
      "parents": [
        "b2858d7d1639c04ca3c54988d76c5f7300b76f1c"
      ],
      "author": {
        "name": "James Bottomley",
        "email": "James.Bottomley@HansenPartnership.com",
        "time": "Sun May 17 18:55:18 2009 +0300"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue May 19 12:14:55 2009 +0200"
      },
      "message": "block: allow blk_rq_map_kern to append to requests\n\nUse blk_rq_append_bio() internally instead of blk_rq_bio_prep()\nso blk_rq_map_kern can be called multiple times, to map multiple\nbuffers.\n\nThis is in the effort to un-export blk_rq_append_bio()\n\nSigned-off-by: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\nSigned-off-by: Boaz Harrosh \u003cbharrosh@panasas.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "a2dec7b36364a5cc564c4d76cf16d2e7d33f5c05",
      "tree": "76dfb84ba5fa097a929ab81cf5718c6fcbc9d720",
      "parents": [
        "34b7d2c957199834c474c9d46739265643f4d9c7"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Thu May 07 22:24:44 2009 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Mon May 11 09:50:55 2009 +0200"
      },
      "message": "block: hide request sector and data_len\n\nBlock low level drivers for some reason have been pretty good at\nabusing block layer API.  Especially struct request\u0027s fields tend to\nget violated in all possible ways.  Make it clear that low level\ndrivers MUST NOT access or manipulate rq-\u003esector and rq-\u003edata_len\ndirectly by prefixing them with double underscores.\n\nThis change is also necessary to break build of out-of-tree codes\nwhich assume the previous block API where internal fields can be\nmanipulated and rq-\u003edata_len carries residual count on completion.\n\n[ Impact: hide internal fields, block API change ]\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "731ec497e5888c6792ad62613ae9be97eebcd7ca",
      "tree": "689a8442d8bdfd50ee6ab05b0c6acd0d229fe391",
      "parents": [
        "ec24751a6b57e1373a12361e581b2458bc9bb791"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Thu Apr 23 11:05:20 2009 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Apr 28 07:37:36 2009 +0200"
      },
      "message": "block: kill rq-\u003edata\n\nNow that all block request data transfer is done via bio, rq-\u003edata\nisn\u0027t used.  Kill it.\n\nWhile at it, make the roles of rq-\u003especial and buffer clear.\n\n[ Impact: drop now unncessary field from struct request ]\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Boaz Harrosh \u003cbharrosh@panasas.com\u003e\n"
    },
    {
      "commit": "97ae77a1cd332c7b011d71315c8faabce6840c72",
      "tree": "fc243ca28ea474eaf81729079eeb3b259cd1b81b",
      "parents": [
        "56c451f4b583ccdf80c9e676179c9cb49de86745"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Thu Dec 18 14:49:38 2008 +0900"
      },
      "committer": {
        "name": "James Bottomley",
        "email": "James.Bottomley@HansenPartnership.com",
        "time": "Fri Jan 02 11:10:35 2009 -0600"
      },
      "message": "[SCSI] block: make blk_rq_map_user take a NULL user-space buffer for WRITE\n\nThe commit 818827669d85b84241696ffef2de485db46b0b5e (block: make\nblk_rq_map_user take a NULL user-space buffer) extended\nblk_rq_map_user to accept a NULL user-space buffer with a READ\ncommand. It was necessary to convert sg to use the block layer mapping\nAPI.\n\nThis patch extends blk_rq_map_user again for a WRITE command. It is\nnecessary to convert st and osst drivers to use the block layer\napping API.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nAcked-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nSigned-off-by: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\n"
    },
    {
      "commit": "56c451f4b583ccdf80c9e676179c9cb49de86745",
      "tree": "7ad9daeafb88e3c4390bf7a2db0c203fe2642728",
      "parents": [
        "e623ddb4e940b266adc77ba1cc28a3554aa90e79"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Thu Dec 18 14:49:37 2008 +0900"
      },
      "committer": {
        "name": "James Bottomley",
        "email": "James.Bottomley@HansenPartnership.com",
        "time": "Fri Jan 02 11:10:08 2009 -0600"
      },
      "message": "[SCSI] block: fix the partial mappings with struct rq_map_data\n\nThis fixes bio_copy_user_iov to properly handle the partial mappings\nwith struct rq_map_data (which only sg uses for now but st and osst\nwill shortly). It adds the offset member to struct rq_map_data and\nchanges blk_rq_map_user to update it so that bio_copy_user_iov can add\nan appropriate page frame via bio_add_pc_page().\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nAcked-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nSigned-off-by: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\n"
    },
    {
      "commit": "53cc0b2948bcb8a084982e6c1f9bd7b337e0df38",
      "tree": "e2d4ca231035de3a14f47b97f6c9196fc375340c",
      "parents": [
        "f6f7b52e2f6149d2ee365717afff315b05720162"
      ],
      "author": {
        "name": "Petr Vandrovec",
        "email": "petr@vandrovec.name",
        "time": "Wed Nov 19 11:12:14 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Wed Dec 03 12:41:20 2008 +0100"
      },
      "message": "When block layer fails to map iov, it calls bio_unmap_user to undo\nmapping.  Which is good if pages were mapped - but if they were provided\nby someone else and just copied then bad things happen - pages are\nreleased once here, and once by caller, leading to user triggerable BUG\nat include/linux/mm.h:246.\n\nSigned-off-by: Petr Vandrovec \u003cpetr@vandrovec.name\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "c26156b2534c75bb3cdedf76f6ad1340971cf5bd",
      "tree": "b95ed72f569c105fcc9e8f38df3d47628e689059",
      "parents": [
        "98ba4031ab2adc8b394295e68aa4c8fe9d5060db"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Nov 18 15:07:05 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Nov 18 15:08:56 2008 +0100"
      },
      "message": "block: hold extra reference to bio in blk_rq_map_user_iov()\n\nIf the size passed in is OK but we end up mapping too many segments,\nwe call the unmap path directly like from IO completion. But from IO\ncompletion we have an extra reference to the bio, so this error case\ngoes OOPS when it attempts to free and already free bio.\n\nFix it by getting an extra reference to the bio before calling the\nunmap failure case.\n\nReported-by: Petr Vandrovec \u003cvandrove@vc.cvut.cz\u003e\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "818827669d85b84241696ffef2de485db46b0b5e",
      "tree": "694d09728733e65d604bf3e1f13679db73fc1d9a",
      "parents": [
        "839e96afba87117befd39cf4e43f156edc8047a7"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Tue Sep 02 16:20:19 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:11 2008 +0200"
      },
      "message": "block: make blk_rq_map_user take a NULL user-space buffer\n\nThis patch changes blk_rq_map_user to accept a NULL user-space buffer\nwith a READ command if rq_map_data is not NULL. Thus a caller can pass\npage frames to lk_rq_map_user to just set up a request and bios with\npage frames propely. bio_uncopy_user (called via blk_rq_unmap_user)\ndoesn\u0027t copy data to user space with such request.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "879040742cf09f2360a9ac41846288707e4e567c",
      "tree": "7768750efd0d8ef28a183f8cd781b0c878212795",
      "parents": [
        "4d8ab62e087d9300883b82c2662e73e6eef803a3"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Thu Aug 28 15:05:58 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:11 2008 +0200"
      },
      "message": "block: add blk_rq_aligned helper function\n\nThis adds blk_rq_aligned helper function to see if alignment and\npadding requirement is satisfied for DMA transfer. This also converts\nblk_rq_map_kern and __blk_rq_map_user to use the helper function.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "152e283fdfea0cd11e297d982378b55937842dde",
      "tree": "a97a57108353f167a1e2911e8ee09c527ef42d3e",
      "parents": [
        "a3bce90edd8f6cafe3f63b1a943800792e830178"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Thu Aug 28 16:17:06 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:10 2008 +0200"
      },
      "message": "block: introduce struct rq_map_data to use reserved pages\n\nThis patch introduces struct rq_map_data to enable bio_copy_use_iov()\nuse reserved pages.\n\nCurrently, bio_copy_user_iov allocates bounce pages but\ndrivers/scsi/sg.c wants to allocate pages by itself and use\nthem. struct rq_map_data can be used to pass allocated pages to\nbio_copy_user_iov.\n\nThe current users of bio_copy_user_iov simply passes NULL (they don\u0027t\nwant to use pre-allocated pages).\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: Douglas Gilbert \u003cdougg@torque.net\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": "a3bce90edd8f6cafe3f63b1a943800792e830178",
      "tree": "c07a2962987e57997b4ff6f6c63febe1feaa0a9c",
      "parents": [
        "45333d5a31296d0af886d94f1d08f128231cab8e"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Thu Aug 28 16:17:05 2008 +0900"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:10 2008 +0200"
      },
      "message": "block: add gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov\n\nCurrently, blk_rq_map_user and blk_rq_map_user_iov always do\nGFP_KERNEL allocation.\n\nThis adds gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov\nso sg can use it (sg always does GFP_ATOMIC allocation).\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nSigned-off-by: Douglas Gilbert \u003cdougg@torque.net\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": "710027a48ede75428cc68eaa8ae2269b1e356e2c",
      "tree": "22cba18860b83b03613bad97c405fb5146a2d686",
      "parents": [
        "5b99c2ffa980528a197f26c7d876cceeccce8dd5"
      ],
      "author": {
        "name": "Randy Dunlap",
        "email": "randy.dunlap@oracle.com",
        "time": "Tue Aug 19 20:13:11 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Oct 09 08:56:03 2008 +0200"
      },
      "message": "Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC.\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "a76eef9573c93f8f324ebacfd090a3e319a64d59",
      "tree": "078510944393a9f658550476160cdc856dd102a1",
      "parents": [
        "a2e2e3577c3ef2b5dbb866e97e612aae4adfa32f"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Fri Jul 25 19:44:39 2008 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Sat Jul 26 12:00:02 2008 -0700"
      },
      "message": "block/blk-map.c: use the new object_is_on_stack() helper\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Bartlomiej Zolnierkiewicz \u003cbzolnier@gmail.com\u003e\nCc: Thomas Bogendoerfer \u003ctsbogend@alpha.franken.de\u003e\nCc: Tejun Heo \u003chtejun@gmail.com\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "30c00eda73d5db5bd64dd0c370161abd8df5ba4a",
      "tree": "87b5a34323eb98edf504e51b2d8e0291559579e3",
      "parents": [
        "27f8221af406e43b529a5425bc99c9b1e9bdf521"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Fri Jul 04 09:31:11 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Fri Jul 04 09:52:13 2008 +0200"
      },
      "message": "block: blk_rq_map_kern uses the bounce buffers for stack buffers\n\nblk_rq_map_kern is used for kernel internal I/Os. Some callers use\nthis function with stack buffers but DMA to/from the stack buffers\nleads to memory corruption on a non-coherent platform.\n\nThis patch make blk_rq_map_kern uses the bounce buffers if a caller\npasses a stack buffer (on the all platforms for simplicity).\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Bartlomiej Zolnierkiewicz \u003cbzolnier@gmail.com\u003e\nCc: Thomas Bogendoerfer \u003ctsbogend@alpha.franken.de\u003e\nCc: Tejun Heo \u003chtejun@gmail.com\u003e\nCc: James Bottomley \u003cJames.Bottomley@HansenPartnership.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "07359fc61bb8ed786f96a1c24cca6f94dd17e329",
      "tree": "d778cf4f214c9e87ecf4a322b687457391ee2906",
      "parents": [
        "c265a7f41706cee20508de5b4a919214cfd7a11b"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Thu Jun 26 19:39:23 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Thu Jul 03 13:21:14 2008 +0200"
      },
      "message": "block: add bounce support to blk_rq_map_user_iov\n\nblk_rq_map_user_iov can\u0027t handle the bounce buffer (it means that the\nbio_map_user_iov path doesn\u0027t work with a LLD that needs GFP_DMA).\n\nThis patch fixes blk_rq_map_user_iov to support the bounce buffer.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Mike Christie \u003cmichaelc@cs.wisc.edu\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "68154e90c9d1492d570671ae181d9a8f8530da55",
      "tree": "4b4e9cfbaa587a576e7e52284c53ef99cf69ac4d",
      "parents": [
        "657e93be356f51888f56a58d2b374caefbf2fe86"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Fri Apr 25 12:47:50 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Apr 29 09:50:34 2008 +0200"
      },
      "message": "block: add dma alignment and padding support to blk_rq_map_kern\n\nThis patch adds bio_copy_kern similar to\nbio_copy_user. blk_rq_map_kern uses bio_copy_kern instead of\nbio_map_kern if necessary.\n\nbio_copy_kern uses temporary pages and the bi_end_io callback frees\nthese pages. bio_copy_kern saves the original kernel buffer at\nbio-\u003ebi_private it doesn\u0027t use something like struct bio_map_data to\nstore the information about the caller.\n\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\u003e\nCc: Tejun Heo \u003chtejun@gmail.com\u003e\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": "afdc1a780ef84a54b613dae6f971407748aab61c",
      "tree": "67f120001c9a0a3f95fbb3ee2dc545f0886440c0",
      "parents": [
        "c5dec1c3034f1ae3503efbf641ff3b0273b64797"
      ],
      "author": {
        "name": "FUJITA Tomonori",
        "email": "fujita.tomonori@lab.ntt.co.jp",
        "time": "Fri Apr 11 12:56:51 2008 +0200"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Mon Apr 21 09:50:08 2008 +0200"
      },
      "message": "block: add bio_copy_user_iov support to blk_rq_map_user_iov\n\nWith this patch, blk_rq_map_user_iov uses bio_copy_user_iov when a low\nlevel driver needs padding or a buffer in sg_iovec isn\u0027t aligned. That\nis, it uses temporary kernel buffers instead of mapping user pages\ndirectly.\n\nWhen a LLD needs padding, later blk_rq_map_sg needs to extend the last\nentry of a scatter list. bio_copy_user_iov guarantees that there is\nenough space for padding by using temporary kernel buffers instead of\nuser pages.\n\nblk_rq_map_user_iov needs buffers in sg_iovec to be aligned. The\ncomment in blk_rq_map_user_iov indicates that drivers/scsi/sg.c also\nneeds buffers in sg_iovec to be aligned. Actually, drivers/scsi/sg.c\nworks with unaligned buffers in sg_iovec (it always uses temporary\nkernel buffers).\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": "56d94a37f63ad1c9da3bc8e903f79d0ee1e80170",
      "tree": "f5a89d4d6df7b959ca7e1ae3cd8f54a935496cc4",
      "parents": [
        "448da4d262b5db90817ce853726ff4d9b0c2bf48"
      ],
      "author": {
        "name": "Harvey Harrison",
        "email": "harvey.harrison@gmail.com",
        "time": "Tue Mar 04 11:31:22 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Mar 04 11:31:22 2008 +0100"
      },
      "message": "block: fix shadowed variable warning in blk-map.c\n\nIntroduced between 2.6.25-rc2 and -rc3\nblock/blk-map.c:154:14: warning: symbol \u0027bio\u0027 shadows an earlier one\nblock/blk-map.c:110:13: originally declared here\n\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "bec419404afe8b0d60000118ca90ada4c69a3a6d",
      "tree": "4febf3a554ef432a9de40a2653131f8a60137f45",
      "parents": [
        "9d7f1e6b9b2c2e4fe029ff35f4ca1e2879864208"
      ],
      "author": {
        "name": "Adrian Bunk",
        "email": "bunk@kernel.org",
        "time": "Tue Mar 04 11:23:48 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Mar 04 11:28:34 2008 +0100"
      },
      "message": "unexport blk_rq_map_user_iov\n\nThis patch removes the unused export of blk_rq_map_user_iov.\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    },
    {
      "commit": "e3790c7d42a545e8fe8b38b513613ca96687b670",
      "tree": "0b849ba46007c4d7f7a34271a76d58e7406cbad7",
      "parents": [
        "7a85f8896f4b4a4a0249563b92af9e3161a6b467"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "htejun@gmail.com",
        "time": "Tue Mar 04 11:18:17 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Mar 04 11:18:17 2008 +0100"
      },
      "message": "block: separate out padding from alignment\n\nBlock layer alignment was used for two different purposes - memory\nalignment and padding.  This causes problems in lower layers because\ndrivers which only require memory alignment ends up with adjusted\nrq-\u003edata_len.  Separate out padding such that padding occurs iff\ndriver explicitly requests it.\n\nTomo: restorethe code to update bio in blk_rq_map_user\n      introduced by the commit 40b01b9bbdf51ae543a04744283bf2d56c4a6afa\n      according to padding alignment.\n\nSigned-off-by: Tejun Heo \u003chtejun@gmail.com\u003e\nSigned-off-by: FUJITA Tomonori \u003cfujita.tomonori@lab.ntt.co.jp\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": "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": "40b01b9bbdf51ae543a04744283bf2d56c4a6afa",
      "tree": "0f81015c01834b97fdb5646a63c3fe1a24936d81",
      "parents": [
        "56c819df77f96c3fc0c2a979e12b478403728790"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "htejun@gmail.com",
        "time": "Tue Feb 19 11:35:38 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Feb 19 11:35:38 2008 +0100"
      },
      "message": "block: update bio according to DMA alignment padding\n\nDMA start address and transfer size alignment for PC requests are\nachieved using bio_copy_user() instead of bio_map_user().  This works\nbecause bio_copy_user() always uses full pages and block DMA alignment\nisn\u0027t allowed to go over PAGE_SIZE.\n\nHowever, the implementation didn\u0027t update the last bio of the request\nto make this padding visible to lower layers.  This patch makes\nblk_rq_map_user() extend the last bio such that it includes the\npadding area and the size of area pointed to by the request is\nproperly aligned.\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": "84e9e03c55c2456799ab19f1d577e72f721fdd39",
      "tree": "e268a42aa43b6dae3c4f4c8d5c4b2e24d6e2d65a",
      "parents": [
        "86b6c7a7f78feca58d2d8615e53aee4d59ab9dc6"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Mon Feb 18 13:51:56 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Feb 19 10:04:00 2008 +0100"
      },
      "message": "block: make blk_rq_map_user() clear -\u003ebio if it unmaps it\n\nThat way the interface is symmetric, and calling blk_rq_unmap_user()\non the request wont oops.\n\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": "86db1e29772372155db08ff48a9ceb76e11a2ad1",
      "tree": "312f38eb3245873c476c50f816b85610fef9615a",
      "parents": [
        "8324aa91d1e11a1fc25f209687a0b2e6c2ed47d0"
      ],
      "author": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Jan 29 14:53:40 2008 +0100"
      },
      "committer": {
        "name": "Jens Axboe",
        "email": "jens.axboe@oracle.com",
        "time": "Tue Jan 29 21:55:08 2008 +0100"
      },
      "message": "block: continue ll_rw_blk.c splitup\n\nAdds files for barrier handling, rq execution, io context handling,\nmapping data to requests, and queue settings.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n"
    }
  ]
}