From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:49218 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752260AbdIRIhQ (ORCPT ); Mon, 18 Sep 2017 04:37:16 -0400 Subject: Patch "md/raid5: release/flush io in raid5_do_work()" has been added to the 4.4-stable tree To: songliubraving@fb.com, gregkh@linuxfoundation.org, shli@fb.com Cc: , From: Date: Mon, 18 Sep 2017 10:37:27 +0200 Message-ID: <15057238471129@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled md/raid5: release/flush io in raid5_do_work() to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: md-raid5-release-flush-io-in-raid5_do_work.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 9c72a18e46ebe0f09484cce8ebf847abdab58498 Mon Sep 17 00:00:00 2001 From: Song Liu Date: Thu, 24 Aug 2017 09:53:59 -0700 Subject: md/raid5: release/flush io in raid5_do_work() From: Song Liu commit 9c72a18e46ebe0f09484cce8ebf847abdab58498 upstream. 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+ Signed-off-by: Song Liu Signed-off-by: Shaohua Li Signed-off-by: Greg Kroah-Hartman --- drivers/md/raid5.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -5822,6 +5822,8 @@ static void raid5_do_work(struct work_st spin_unlock_irq(&conf->device_lock); + r5l_flush_stripe_to_raid(conf->log); + async_tx_issue_pending_all(); blk_finish_plug(&plug); Patches currently in stable-queue which might be from songliubraving@fb.com are queue-4.4/md-raid5-release-flush-io-in-raid5_do_work.patch