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  1. 22 Oct, 2010 8 commits
    • Josef Bacik's avatar
      Btrfs: fix error handling in btrfs_get_sb · 0e78340f
      Josef Bacik authored 
      If we failed to find the root subvol id, or the subvol=<name>, we would
deactivate the locked super and close the devices.  The problem is at this point
we have gotten the SB all setup, which includes setting super_operations, so
when we'd deactiveate the super, we'd do a close_ctree() which closes the
devices, so we'd end up closing the devices twice.  So if you do something like
this

mount /dev/sda1 /mnt/test1
mount /dev/sda1 /mnt/test2 -o subvol=xxx
umount /mnt/test1

it would blow up (if subvol xxx doesn't exist).  This patch fixes that problem.
Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      0e78340f
    • Josef Bacik's avatar
      Btrfs: rework how we reserve metadata bytes · 8bb8ab2e
      Josef Bacik authored 
      With multi-threaded writes we were getting ENOSPC early because somebody would
come in, start flushing delalloc because they couldn't make their reservation,
and in the meantime other threads would come in and use the space that was
getting freed up, so when the original thread went to check to see if they had
space they didn't and they'd return ENOSPC.  So instead if we have some free
space but not enough for our reservation, take the reservation and then start
doing the flushing.  The only time we don't take reservations is when we've
already overcommitted our space, that way we don't have people who come late to
the party way overcommitting ourselves.  This also moves all of the retrying and
flushing code into reserve_metdata_bytes so it's all uniform.  This keeps my
fs_mark test from returning -ENOSPC as soon as it starts and actually lets me
fill up the disk.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      8bb8ab2e
    • Josef Bacik's avatar
      Btrfs: don't allocate chunks as aggressively · 14ed0ca6
      Josef Bacik authored 
      Because the ENOSPC code over reserves super aggressively we end up allocating
chunks way more often than we should.  For example with my fs_mark tests on a
2gb fs I can end up reserved 1gb just for metadata, when only 34mb of that is
being used.  So instead check to see if the amount of space actually used is
less than 30% of the total space, and if so don't allocate a chunk, but only if
we have at least 256mb of free space to make sure we don't put too much pressure
on free space.
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      14ed0ca6
    • Josef Bacik's avatar
      Btrfs: re-work delalloc flushing · 0019f10d
      Josef Bacik authored 
      Currently we try and flush delalloc, but we only do that in a sort of weak way,
which works fine in most cases but if we're under heavy pressure we need to be
able to wait for flushing to happen.  Also instead of checking the bytes
reserved in the block_rsv, check the space info since it is more accurate.  The
sync option will be used in a future patch.
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      0019f10d
    • Josef Bacik's avatar
      Btrfs: fix reservation code for mixed block groups · 6d48755d
      Josef Bacik authored 
      The global reservation stuff tries to add together DATA and METADATA used in
order to figure out how much to reserve for everything, but this doesn't work
right for mixed block groups.  Instead if we have mixed block groups just set
data used to 0.  Also with mixed block groups we will use bytes_may_use for
keeping track of delalloc bytes, so we need to take that into account in our
reservation calculations.
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      6d48755d
    • Josef Bacik's avatar
      Btrfs: fix df regression · 89a55897
      Josef Bacik authored 
      The new ENOSPC stuff breaks out the raid types which breaks the way we were
reporting df to the system.  This fixes it back so that Available is the total
space available to data and used is the actual bytes used by the filesystem.
This means that Available is Total - data used - all of the metadata space.
Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      89a55897
    • Josef Bacik's avatar
      Btrfs: fix the df ioctl to report raid types · bf5fc093
      Josef Bacik authored 
      The new ENOSPC stuff broke the df ioctl since we no longer create seperate space
info's for each RAID type.  So instead, loop through each space info's raid
lists so we can get the right RAID information which will allow the df ioctl to
tell us RAID types again.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      bf5fc093
    • Josef Bacik's avatar
      Btrfs: stop trying to shrink delalloc if there are no inodes to reclaim · a1f76506
      Josef Bacik authored 
      In very severe ENOSPC cases we can run out of inodes to do delalloc on, which
means we'll just keep looping trying to shrink delalloc.  Instead, if we fail to
shrink delalloc 3 times in a row break out since we're not likely to make any
progress.  Tested this with a 100mb fs an xfstests test 13.  Before the patch it
would hang the box, with the patch we get -ENOSPC like we should.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      a1f76506
  3. 01 Aug, 2010 2 commits
  5. 31 Jul, 2010 5 commits
  7. 30 Jul, 2010 8 commits
  9. 29 Jul, 2010 17 commits
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