)]}'
{
  "commit": "1122a26f2abe4245ccdaed95ec23f63fe086b332",
  "tree": "ad06f119f283cf8a6313681055e8132ba2851ddb",
  "parents": [
    "3bd0f0c763e497c8674b28e3df2732f48683dabd"
  ],
  "author": {
    "name": "Christoph Hellwig",
    "email": "hch@infradead.org",
    "time": "Wed Sep 30 13:52:12 2009 +0200"
  },
  "committer": {
    "name": "Jens Axboe",
    "email": "jens.axboe@oracle.com",
    "time": "Thu Oct 01 21:15:46 2009 +0200"
  },
  "message": "block: use normal I/O path for discard requests\n\nprepare_discard_fn() was being called in a place where memory allocation\nwas effectively impossible.  This makes it inappropriate for all but\nthe most trivial translations of Linux\u0027s DISCARD operation to the block\ncommand set.  Additionally adding a payload there makes the ownership\nof the bio backing unclear as it\u0027s now allocated by the device driver\nand not the submitter as usual.\n\nIt is replaced with QUEUE_FLAG_DISCARD which is used to indicate whether\nthe queue supports discard operations or not.  blkdev_issue_discard now\nallocates a one-page, sector-length payload which is the right thing\nfor the common ATA and SCSI implementations.\n\nThe mtd implementation of prepare_discard_fn() is replaced with simply\nchecking for the request being a discard.\n\nLargely based on a previous patch from Matthew Wilcox \u003cmatthew@wil.cx\u003e\nwhich did the prepare_discard_fn but not the different payload allocation\nyet.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n",
  "tree_diff": [
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}