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    Btrfs: avoid taking the trans_mutex in btrfs_end_transaction · 13c5a93e
    Josef Bacik 提交于
    I've been working on making our O_DIRECT latency not suck and I noticed we were
    taking the trans_mutex in btrfs_end_transaction.  So to do this we convert
    num_writers and use_count to atomic_t's and just decrement them in
    btrfs_end_transaction.  Instead of deleting the transaction from the trans list
    in put_transaction we do that in btrfs_commit_transaction() since that's the
    only time it actually needs to be removed from the list.  Thanks,
    Signed-off-by: NJosef Bacik <josef@redhat.com>
    13c5a93e
transaction.h 4.5 KB