From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24FC6C76191 for ; Mon, 15 Jul 2019 14:56:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E6C91205ED for ; Mon, 15 Jul 2019 14:56:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202584; bh=vauugTCYVpPt88MXNLLkXnhFnLKvJhyTJlH9KoPuBvk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OWOucGA0Y7a2+insULZKJrmYEQbmBqI0eiRNsnlJ24vR7Gc71rc/yJQ6ElmsSY2KV eaUFTj0IRT2O1XmGytbG246YJPh0vtRZbGA6jJ83lOcDuc13XPA4F1rOp7CevDOEPb +zGGpYEkQaX5MKdIcljM7m0lt4OEk9zS76H2Ji6E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389618AbfGOOXB (ORCPT ); Mon, 15 Jul 2019 10:23:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:52604 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390674AbfGOOXA (ORCPT ); Mon, 15 Jul 2019 10:23:00 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6247A21852; Mon, 15 Jul 2019 14:22:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563200580; bh=vauugTCYVpPt88MXNLLkXnhFnLKvJhyTJlH9KoPuBvk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vm0W0mJlXsMtzsqBw7YGIC7dyyKPExkjUk73htj1HwPsvM+j3TpVXVtLh1+T33CMJ EJsaSoUFHUWsH02C5Y1TX5XI8oYaIlbRQnn13P3mYWiq5yjs7N8jvXmT9ovIn56+gG rnMlEJurkUL9lsKLorb0UFGIDVqQgatIJNt//ixU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dennis Zhou , Josef Bacik , Jens Axboe , Sasha Levin , linux-block@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 082/158] blk-iolatency: only account submitted bios Date: Mon, 15 Jul 2019 10:16:53 -0400 Message-Id: <20190715141809.8445-82-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715141809.8445-1-sashal@kernel.org> References: <20190715141809.8445-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Dennis Zhou [ Upstream commit a3fb01ba5af066521f3f3421839e501bb2c71805 ] As is, iolatency recognizes done_bio and cleanup as ending paths. If a request is marked REQ_NOWAIT and fails to get a request, the bio is cleaned up via rq_qos_cleanup() and ended in bio_wouldblock_error(). This results in underflowing the inflight counter. Fix this by only accounting bios that were actually submitted. Signed-off-by: Dennis Zhou Cc: Josef Bacik Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-iolatency.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c index 6b8396ccb5c4..75df47ad2e79 100644 --- a/block/blk-iolatency.c +++ b/block/blk-iolatency.c @@ -565,6 +565,10 @@ static void blkcg_iolatency_done_bio(struct rq_qos *rqos, struct bio *bio) if (!blkg) return; + /* We didn't actually submit this bio, don't account it. */ + if (bio->bi_status == BLK_STS_AGAIN) + return; + iolat = blkg_to_lat(bio->bi_blkg); if (!iolat) return; -- 2.20.1