From: Christoph Hellwig <hch@xxxxxxxxxxxxx> ext4 already uses synchronous discards, no need to add I/O barriers. Signed-off-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> --- fs/ext4/mballoc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index df44b34..a22bfef 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2567,7 +2567,7 @@ static inline void ext4_issue_discard(struct super_block *sb, trace_ext4_discard_blocks(sb, (unsigned long long) discard_block, count); ret = sb_issue_discard(sb, discard_block, count, GFP_NOFS, - BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER); + BLKDEV_IFL_WAIT); if (ret == EOPNOTSUPP) { ext4_warning(sb, "discard not supported, disabling"); clear_opt(EXT4_SB(sb)->s_mount_opt, DISCARD); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html