1. 18 5月, 2013 1 次提交
    • C
      Btrfs: use a btrfs bioset instead of abusing bio internals · 9be3395b
      Chris Mason 提交于
      Btrfs has been pointer tagging bi_private and using bi_bdev
      to store the stripe index and mirror number of failed IOs.
      
      As bios bubble back up through the call chain, we use these
      to decide if and how to retry our IOs.  They are also used
      to count IO failures on a per device basis.
      
      Recently a bio tracepoint was added lead to crashes because
      we were abusing bi_bdev.
      
      This commit adds a btrfs bioset, and creates explicit fields
      for the mirror number and stripe index.  The plan is to
      extend this structure for all of the fields currently in
      struct btrfs_bio, which will mean one less kmalloc in
      our IO path.
      Signed-off-by: NChris Mason <chris.mason@fusionio.com>
      Reported-by: NTejun Heo <tj@kernel.org>
      9be3395b
  2. 07 5月, 2013 39 次提交