diff options
| author | Dave Chinner <dchinner@redhat.com> | 2021-06-25 21:21:00 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-06-25 21:21:00 +0300 |
| commit | 6be001021f0b307c8c1544e8b3ac87de20d711de (patch) | |
| tree | e00ff94811efb130eb78d40d10ab6be8b15065ce /fs/xfs | |
| parent | d3a3340b6af28ab79a66687973fb0287d976d490 (diff) | |
| download | linux-6be001021f0b307c8c1544e8b3ac87de20d711de.tar.xz | |
xfs: don't nest icloglock inside ic_callback_lock
It's completely unnecessary because callbacks are added to iclogs
without holding the icloglock, hence no amount of ordering between
the icloglock and ic_callback_lock will order the removal of
callbacks from the iclog.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_log.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index e93cac6b5378..bb4390942275 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -2773,11 +2773,8 @@ static void xlog_state_do_iclog_callbacks( struct xlog *log, struct xlog_in_core *iclog) - __releases(&log->l_icloglock) - __acquires(&log->l_icloglock) { trace_xlog_iclog_callbacks_start(iclog, _RET_IP_); - spin_unlock(&log->l_icloglock); spin_lock(&iclog->ic_callback_lock); while (!list_empty(&iclog->ic_callbacks)) { LIST_HEAD(tmp); @@ -2789,12 +2786,6 @@ xlog_state_do_iclog_callbacks( spin_lock(&iclog->ic_callback_lock); } - /* - * Pick up the icloglock while still holding the callback lock so we - * serialise against anyone trying to add more callbacks to this iclog - * now we've finished processing. - */ - spin_lock(&log->l_icloglock); spin_unlock(&iclog->ic_callback_lock); trace_xlog_iclog_callbacks_done(iclog, _RET_IP_); } @@ -2836,13 +2827,12 @@ xlog_state_do_callback( iclog = iclog->ic_next; continue; } + spin_unlock(&log->l_icloglock); - /* - * Running callbacks will drop the icloglock which means - * we'll have to run at least one more complete loop. - */ - cycled_icloglock = true; xlog_state_do_iclog_callbacks(log, iclog); + cycled_icloglock = true; + + spin_lock(&log->l_icloglock); if (XLOG_FORCED_SHUTDOWN(log)) wake_up_all(&iclog->ic_force_wait); else |