From 9c72a18e46ebe0f09484cce8ebf847abdab58498 Mon Sep 17 00:00:00 2001 From: Song Liu Date: Thu, 24 Aug 2017 09:53:59 -0700 Subject: [PATCH] md/raid5: release/flush io in raid5_do_work() In raid5, there are scenarios where some ios are deferred to a later time, and some IO need a flush to complete. To make sure we make progress with these IOs, we need to call the following functions: flush_deferred_bios(conf); r5l_flush_stripe_to_raid(conf->log); Both of these functions are called in raid5d(), but missing in raid5_do_work(). As a result, these functions are not called when multi-threading (group_thread_cnt > 0) is enabled. This patch adds calls to these function to raid5_do_work(). Note for stable branches: r5l_flush_stripe_to_raid(conf->log) is need for 4.4+ flush_deferred_bios(conf) is only needed for 4.11+ Cc: stable@vger.kernel.org (4.4+) Signed-off-by: Song Liu Signed-off-by: Shaohua Li --- drivers/md/raid5.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 0fc2748aaf95..e13a8ce7f589 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -6235,6 +6235,10 @@ static void raid5_do_work(struct work_struct *work) spin_unlock_irq(&conf->device_lock); + flush_deferred_bios(conf); + + r5l_flush_stripe_to_raid(conf->log); + async_tx_issue_pending_all(); blk_finish_plug(&plug);