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Btrfs: Fix async thread shutdown race
authorChris Mason <chris.mason@oracle.com>
Wed, 16 Sep 2009 00:02:33 +0000 (20:02 -0400)
committerChris Mason <chris.mason@oracle.com>
Wed, 16 Sep 2009 00:20:17 +0000 (20:20 -0400)
commit6e74057c4686dc12ea767b4bdc50a63876056e1c
treee7c70b8e08ab9e5363be28bcbcc72348122ae6e4tree | snapshot (tar.gz zip)
parent627e421a3f35ad6b52dc58982fb6f8a97c30dcd7commit | diff
Btrfs: Fix async thread shutdown race

It was possible for an async worker thread to be selected to
receive a new work item, but exit before the work item was
actually placed into that thread's work list.

This commit fixes the race by incrementing the num_pending
counter earlier, and making sure to check the number of pending
work items before a thread exits.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/async-thread.c diff | blob | blame | history