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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8F663CEBF97 for ; Tue, 18 Nov 2025 14:46:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:In-Reply-To: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=tYX/KYULeh4QeKPfElgfpfCKO+YzjCq0DouTjaZ/LJw=; b=xzs8Pz2dSLvVjbDffhQKF8Je4h dky8T0bKC9ctTrSg7BQL+Ez1lNwiZIBY1HmQXwxEKRJaP76D3FXlUyVUt9vbFSsX/g8npkdrKvoBs ik0DZbnO3trBOFF94/iWVet3nXen85E77H6pbaQ5AuuD9C7AQox8UsLRuAzqtkoJ2/ghr6FRreq6z usiafd6RZ30o0Mc2wYT+AvjmQ/0rdx+tiwNbJVM/4JHhgE/YqHVjFpzZAT28fp02eJEA2DUeRDTpJ r9ne67n4LZO1uhv9uWI4VOToSnOnbqUUGVArm932TBEuQauDz6X2HW9/Eo6cJdcP5F5Aj+mWucz5Y HWNEl2sg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLMxv-00000000ZlE-3GDj; Tue, 18 Nov 2025 14:45:55 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLMxr-00000000Zkm-06FK for linux-nvme@lists.infradead.org; Tue, 18 Nov 2025 14:45:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1763477146; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=tYX/KYULeh4QeKPfElgfpfCKO+YzjCq0DouTjaZ/LJw=; b=d4BLJ8p6OaHb8XOPT1A6d2f1beiZy8u054kFTXpjD5izj9QNc2aDTE9zdCb8lbfTULJzvN Xn8t+rKSqKb7sYOIWpfAiw6dbFvuxwVJ719ZmxiooZabqkintj80gPZuDEhycjLy8J4SbV xkgUgv/XsZmc+aiCwrTUFN2ewbKlOLI= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-170-M5rE12nANs6r6wYjeonbEA-1; Tue, 18 Nov 2025 09:45:40 -0500 X-MC-Unique: M5rE12nANs6r6wYjeonbEA-1 X-Mimecast-MFC-AGG-ID: M5rE12nANs6r6wYjeonbEA_1763477138 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 49CF219560A7; Tue, 18 Nov 2025 14:45:38 +0000 (UTC) Received: from napanee.usersys.redhat.com (unknown [10.22.89.147]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 3931A3003754; Tue, 18 Nov 2025 14:45:37 +0000 (UTC) Received: by napanee.usersys.redhat.com (Postfix, from userid 1000) id 889C1C3771; Tue, 18 Nov 2025 09:45:36 -0500 (EST) Date: Tue, 18 Nov 2025 09:45:36 -0500 From: Aristeu Rozanski To: Ewan Milne Cc: linux-nvme@lists.infradead.org, Justin Tee , Naresh Gottumukkala , Paul Ely , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg Subject: Re: [PATCH] nvme: fc: stop lsrcv workqueue before freeing a rport Message-ID: <7c0a33f7-ecc5-474d-a549-5f807de6a66e@work> References: <21255200-a271-4fa0-b099-97755c8acd4c@work> <1529dc0e-bc1f-4672-98d8-f9ccfe5c1fb7@work> MIME-Version: 1.0 In-Reply-To: User-Agent: NeoMutt/20241114-35-62db1e X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 6vXjnUncJLHOv4-ta0IYSZZ94PrFcOXCFmIuEa24t6w_1763477138 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251118_064552_422079_A3687063 X-CRM114-Status: GOOD ( 13.64 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Sun, Nov 16, 2025 at 04:51:30PM -0500, Ewan Milne wrote: > Try running the test with the kernel parameter "slub_debug=FZPU" and see if > you get > a more consistent failure. This will poison the memory with a specific > pattern when > the kfree() frees the object, a subsequent list debug message or stack > trace with > registers may show the pattern. > > I suspect it is just very sensitive to the timing. Turns out it did made reproducing this faster. Thanks -- Aristeu