Btrfs: fix small race with delalloc flushing waitqueue's

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Everytime we start a new flushing thread, we init the waitqueue if there isn't a
flushing thread running.  The problem with this is we check
space_info->flushing, which we clear right before doing a wake_up on the
flushing waitqueue, which causes problems if we init the waitqueue in the middle
of clearing the flushing flagh and calling wake_up.  This is hard to hit, but
the code is wrong anyway, so init the flushing/allocating waitqueue when
creating the space info and let it be.  I haven't seen the panic since I've been
using this patch.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Josef Bacik 2010-03-12 19:28:18 +00:00 • committed by Chris Mason

parent 28ecb60906

commit b5cb160084

1 changed files with 4 additions and 5 deletions

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fs/btrfs/extent-tree.c

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