1. 26 11月, 2012 9 次提交
  2. 25 11月, 2012 1 次提交
  3. 24 11月, 2012 29 次提交
  4. 23 11月, 2012 1 次提交
    • R
      block: Don't access request after it might be freed · 893d290f
      Roland Dreier 提交于
      After we've done __elv_add_request() and __blk_run_queue() in
      blk_execute_rq_nowait(), the request might finish and be freed
      immediately.  Therefore checking if the type is REQ_TYPE_PM_RESUME
      isn't safe afterwards, because if it isn't, rq might be gone.
      Instead, check beforehand and stash the result in a temporary.
      
      This fixes crashes in blk_execute_rq_nowait() I get occasionally when
      running with lots of memory debugging options enabled -- I think this
      race is usually harmless because the window for rq to be reallocated
      is so small.
      Signed-off-by: NRoland Dreier <roland@purestorage.com>
      Cc: stable@kernel.org
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      893d290f