• Eric Sandeen's avatar
    jbd2: don't wake kjournald unnecessarily · e7b04ac0
    Eric Sandeen authored
    Don't send an extra wakeup to kjournald in the case where we
    already have the proper target in j_commit_request, i.e. that
    transaction has already been requested for commit.
    
    commit deeeaf13 "jbd2: fix fsync() tid wraparound bug" changed
    the logic leading to a wakeup, but it caused some extra wakeups
    which were found to lead to a measurable performance regression.
    Signed-off-by: default avatarEric Sandeen <sandeen@redhat.com>
    [tytso@mit.edu: reworked check to make it clearer]
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    e7b04ac0
journal.c 72.8 KB