From: Dave Chinner <dchinner@xxxxxxxxxx> The new LRU list isolation code in xfs_qm_dquot_isolate() isn't completely up to date. Firstly, it needs conversion to return enum lru_status values, not raw numbers. Secondly - most importantly - it fails to unlock the dquot and relock the LRU in the LRU_RETRY path. This leads to deadlocks in xfstests generic/232. Fix them. Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx> --- fs/xfs/xfs_qm.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index 46743cf..a10a720 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -659,7 +659,7 @@ xfs_qm_dquot_isolate( trace_xfs_dqreclaim_want(dqp); list_del_init(&dqp->q_lru); XFS_STATS_DEC(xs_qm_dquot_unused); - return 0; + return LRU_REMOVED; } /* @@ -705,17 +705,19 @@ xfs_qm_dquot_isolate( XFS_STATS_DEC(xs_qm_dquot_unused); trace_xfs_dqreclaim_done(dqp); XFS_STATS_INC(xs_qm_dqreclaims); - return 0; + return LRU_REMOVED; out_miss_busy: trace_xfs_dqreclaim_busy(dqp); XFS_STATS_INC(xs_qm_dqreclaim_misses); - return 2; + return LRU_SKIP; out_unlock_dirty: trace_xfs_dqreclaim_busy(dqp); XFS_STATS_INC(xs_qm_dqreclaim_misses); - return 3; + xfs_dqunlock(dqp); + spin_lock(lru_lock); + return LRU_RETRY; } static unsigned long -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
