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 0C6F4C27C54 for ; Thu, 6 Jun 2024 13:08:51 +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:In-Reply-To:Content-Type: 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=T0pXIfa3ELiqj1PX10MhaXn5eMdxq4r2GX65pdA4Xkg=; b=B4h3I+jtiu6UMohalwmX6epP7F uQyJEiTOsVWVT0vvdkFQbJMCIt3oG+6k9EuWnZsNUvVuK/HI7EqF2IXb+162iKgAuty0r+BnF0djH YxnbR7GvNBYZRjFbvjrSC6wHYgESJlZRUWBx6f7Wmkx5X334xHEecaXsvCT0GER2SP1kvP/hcbSTw 7AmwR4XBkW96Vd7tlDpAoU0A/X99BXOCXjr2EJLstMbsa9nYEPZpKQXuSxlQjYGUDOXtCNQlm1B0Y I1t84gR3n37mjctQUVuKp0EZrtv5hTFp7t1Jupn5jfw7K61A4dNexC05cPJfcNp5oKiKaz+af2aLS ukq7H/8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFCrI-00000009nbe-35wI; Thu, 06 Jun 2024 13:08:48 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFCrE-00000009naW-22jV for linux-nvme@lists.infradead.org; Thu, 06 Jun 2024 13:08:46 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 77ABA68D08; Thu, 6 Jun 2024 15:08:32 +0200 (CEST) Date: Thu, 6 Jun 2024 15:08:32 +0200 From: Christoph Hellwig To: Ofir Gal Cc: Sagi Grimberg , Christoph Hellwig , davem@davemloft.net, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, netdev@vger.kernel.org, ceph-devel@vger.kernel.org, dhowells@redhat.com, edumazet@google.com, pabeni@redhat.com, kbusch@kernel.org, axboe@kernel.dk, philipp.reisner@linbit.com, lars.ellenberg@linbit.com, christoph.boehmwalder@linbit.com, idryomov@gmail.com, xiubli@redhat.com Subject: Re: [PATCH v2 1/4] net: introduce helper sendpages_ok() Message-ID: <20240606130832.GA5925@lst.de> References: <20240530142417.146696-1-ofir.gal@volumez.com> <20240530142417.146696-2-ofir.gal@volumez.com> <8d0c198f-9c15-4a8f-957a-2e4aecddd2e5@grimberg.me> <23821101-adf0-4e38-a894-fb05a19cb9c3@volumez.com> <86e60615-9286-4c9c-bffc-72304bd3cc1f@grimberg.me> <20240604042738.GA28853@lst.de> <62c2b8cd-ce6a-4e13-a58c-a6b30a0dcf17@grimberg.me> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240606_060844_715285_417558A8 X-CRM114-Status: GOOD ( 11.62 ) 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 Thu, Jun 06, 2024 at 03:57:25PM +0300, Ofir Gal wrote: > The slab pages aren't allocated by the md-bitmap, they are pages that > happens to be after the allocated pages. I'm applying a patch to the md > subsystem asap. Similar cases could happen by other means as well. E.g. if you write to the last blocks in an XFS allocation group while also writing something to superblock copy at the beginnig of the next one and the two writes get merged. Probably not easy to reproduce but entirely possible. Just as as lot of other scenarious could happen due to merges.