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Thu, 14 May 2020 11:27:04 -0400 X-MC-Unique: 7khh2vMiNeqCviSqXYo5RQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 38DE519057A1; Thu, 14 May 2020 15:27:03 +0000 (UTC) Received: from [10.3.112.128] (ovpn-112-128.phx2.redhat.com [10.3.112.128]) by smtp.corp.redhat.com (Postfix) with ESMTP id A59FB5D9CA; Thu, 14 May 2020 15:27:02 +0000 (UTC) Subject: Re: [PATCH] nvmet: nvmet_async_events_process always free async event to avoid memleak To: Christoph Hellwig References: <1589382492-9811-1-git-send-email-dmilburn@redhat.com> <20200514150535.GA10740@infradead.org> From: David Milburn Message-ID: <445bebd6-d5c9-8ae2-7547-c3fa4b8aecf9@redhat.com> Date: Thu, 14 May 2020 10:27:02 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20200514150535.GA10740@infradead.org> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200514_082711_651478_55106605 X-CRM114-Status: GOOD ( 17.54 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-nvme@lists.infradead.org, chaitanya.kulkarni@wdc.com, dwagner@suse.de Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Hi Christoph, On 05/14/2020 10:05 AM, Christoph Hellwig wrote: > I don't think we should take the aen off the list if there is no > command slot available. So probably something like this instead: Ok, we will retest. Thanks, David > > diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c > index b685f99d56a1f..0df9300d717d6 100644 > --- a/drivers/nvme/target/core.c > +++ b/drivers/nvme/target/core.c > @@ -134,15 +134,10 @@ static void nvmet_async_events_process(struct nvmet_ctrl *ctrl, u16 status) > struct nvmet_async_event *aen; > struct nvmet_req *req; > > - while (1) { > - mutex_lock(&ctrl->lock); > - aen = list_first_entry_or_null(&ctrl->async_events, > + mutex_lock(&ctrl->lock); > + while (ctrl->nr_async_event_cmds && !list_empty(&ctrl->async_events)) { > + aen = list_first_entry(&ctrl->async_events, > struct nvmet_async_event, entry); > - if (!aen || !ctrl->nr_async_event_cmds) { > - mutex_unlock(&ctrl->lock); > - break; > - } > - > req = ctrl->async_event_cmds[--ctrl->nr_async_event_cmds]; > if (status == 0) > nvmet_set_result(req, nvmet_async_event_result(aen)); > @@ -152,7 +147,9 @@ static void nvmet_async_events_process(struct nvmet_ctrl *ctrl, u16 status) > > mutex_unlock(&ctrl->lock); > nvmet_req_complete(req, status); > + mutex_lock(&ctrl->lock); > } > + mutex_unlock(&ctrl->lock); > } > > static void nvmet_async_events_free(struct nvmet_ctrl *ctrl) > > _______________________________________________ > linux-nvme mailing list > linux-nvme@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-nvme > _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme