btrfs: qgroup rescan races (part 1)

From: Jeff Mahoney <[email protected]>

Hi Dave -

Here's the updated patchset for the rescan races. This fixes the issue where we'd try to start multiple workers. It introduces a new "ready" bool that we set during initialization and clear while queuing the worker. The queuer is also now responsible for most of the initialization.

I have a separate patch set start that gets rid of the racy mess surrounding the rescan worker startup. We can handle it in btrfs_run_qgroups and just set a flag to start it everywhere else.

-Jeff

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Jeff Mahoney (3):
btrfs: qgroups, fix rescan worker running races
btrfs: qgroups, remove unnecessary memset before btrfs_init_work
btrfs: qgroup, don't try to insert status item after ENOMEM in rescan
worker

 fs/btrfs/async-thread.c |   1 +
 fs/btrfs/ctree.h        |   2 +
 fs/btrfs/qgroup.c       | 100 +++++++++++++++++++++++++++---------------------
 3 files changed, 60 insertions(+), 43 deletions(-)

2.12.3