Received: by 2002:ac0:a581:0:0:0:0:0 with SMTP id m1-v6csp843958imm; Wed, 20 Jun 2018 07:31:49 -0700 (PDT) X-Google-Smtp-Source: ADUXVKIHkldaQLWQWybjZK4mvaYVXt+/k1NJdhKOfeQjHpdUgrWjaD3+5GF3cT4AwBpCh+gR+3kl X-Received: by 2002:a63:7741:: with SMTP id s62-v6mr19370485pgc.103.1529505109630; Wed, 20 Jun 2018 07:31:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1529505109; cv=none; d=google.com; s=arc-20160816; b=VMXUaIPVVlQF3AuN4PYyILaYw5Ja3lFAb6glxCZYrD+YuKoLkKsD7xW2I/jEDTGP6h BPb4B9LS09MeO0f6O/zUua8jyYAJha1cdp0p/WpP8JaFvTAwG//iF96EmLVgrrJxTFoS +n5mRjntZAk6GYrar0qUkBkocEq3nZIG5qkBAfvMjw4/NXK5czdAz8vB6qgKPNhqxycY ub+g8JkA1qIYObjYfFDEO/DwM2As3BfSLzpO+iwmURWh8vk4CJRt/T8FwZ61uK4uQ8Qj wnFn7aUKwmQT876njXDy/X1mLyQNF2o78iZJVExq8a1pi5HAvu40iF1+1vsb0MWUXi0i lj6Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=UbKwUi3NqkBMtKnSBf2qMdZE+7dSRDY9utXIin9jjag=; b=S/GZ6sLCwYEwAg8iiJJ/ygkRSTdBl9rt/OgGwse3T0RJTLi+SACLTJ3Fqs4uB8LObj qEyPFfZAEaeBsjBY/xm0QZi5aPsJhL5Ai+2w0iLcdfjoXHrgY8L9sOFr+9dxI5Usylay AIXmPGZ/fW28c7oL7WlVpbe+GcZst6ELwviktueMrDNF47UaUiXb3TiLN62rwcyansd8 Fqi1UaSZhT5OacMi2uHjOJ3eD02XAa7oQIlljG7Rr3B/VzRyqu7sv04XoK1Tfpzzb2B2 AfZpAdhfJc1fN+806zCX34wjB/gOxKszJcarphcEQISSpIdfqzOrzfMAIs+oRh2Wrnb7 zNxg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id v19-v6si1259080plo.357.2018.06.20.07.31.35; Wed, 20 Jun 2018 07:31:49 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754210AbeFTOau (ORCPT + 99 others); Wed, 20 Jun 2018 10:30:50 -0400 Received: from verein.lst.de ([213.95.11.211]:47126 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754099AbeFTOar (ORCPT ); Wed, 20 Jun 2018 10:30:47 -0400 Received: by newverein.lst.de (Postfix, from userid 2407) id BC38B68E40; Wed, 20 Jun 2018 16:39:56 +0200 (CEST) Date: Wed, 20 Jun 2018 16:39:56 +0200 From: Christoph Hellwig To: Jianchao Wang Cc: axboe@kernel.dk, hch@lst.de, martin.petersen@oracle.com, keith.busch@intel.com, josef@toxicpanda.com, ulf.hansson@linaro.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 5/5] nvme: use __blk_mq_complete_request in timeout path Message-ID: <20180620143956.GA20950@lst.de> References: <1529500964-28429-1-git-send-email-jianchao.w.wang@oracle.com> <1529500964-28429-6-git-send-email-jianchao.w.wang@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1529500964-28429-6-git-send-email-jianchao.w.wang@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c > index 73a97fc..2a161f6 100644 > --- a/drivers/nvme/host/pci.c > +++ b/drivers/nvme/host/pci.c > @@ -1203,6 +1203,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) > nvme_warn_reset(dev, csts); > nvme_dev_disable(dev, false); > nvme_reset_ctrl(&dev->ctrl); > + __blk_mq_complete_request(req); > return BLK_EH_DONE; > } > > @@ -1213,6 +1214,11 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) > dev_warn(dev->ctrl.device, > "I/O %d QID %d timeout, completion polled\n", > req->tag, nvmeq->qid); > + /* > + * nvme_end_request will invoke blk_mq_complete_request, > + * it will do nothing for this timed out request. > + */ > + __blk_mq_complete_request(req); And this clearly is bogus. We want to iterate over the tagetset and cancel all requests, not do that manually here. That was the whole point of the original change.