mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-13 14:14:37 +00:00
Code Issues Releases Wiki Activity

Btrfs: wait for ordered extents if we didn't reclaim enough

Browse source 
I noticed recently that my overcommit patch was causing one of my enospc tests
to fail 25% of the time with early ENOSPC.  This is because my overcommit patch
was letting us go way over board, but it wasn't waiting long enough to let the
delalloc shrinker do it's job.  The problem is we just start writeback and wait
a little bit hoping we flush enough, but we only free up delalloc space by
having the writes complete all the way.  We do this by waiting for ordered
extents, which we do but only if we already free'd enough for the reservation,
which isn't right, we should flush ordered extents if we didn't reclaim enough
in case that will push us over the edge.  With this patch I've not seen a
failure in this enospc test after running it in a loop for an hour.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik 2011-10-07 11:55:34 -04:00
parent 5b0e95bf60
commit 4b91c14f91
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
fs/btrfs/extent-tree.c
View file

@ -3406,7 +3406,7 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
}
}
if (reclaimed >= to_reclaim && !trans)
if (reclaimed < to_reclaim && !trans)
btrfs_wait_ordered_extents(root, 0, 0);
return reclaimed >= to_reclaim;
}