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=-5.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 AFD41C43331 for ; Mon, 11 Nov 2019 16:34:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8612F2173B for ; Mon, 11 Nov 2019 16:34:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573490083; bh=71g3I8FN9cKyEIsTndR2DMxU6WI8XxUlHgrraLIGuIc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=v+ibui5UBwed4u1rdjJCQxodfmJdJoDPDHOI0zp3ssGf0GskRQnsNhXg9q2mYaHnC mE7nxWrDxwG5fgHjyNbTY5BVRjuoGUaCGNmUAUhoBzGaMZrBvFvqCE0tk1VjbztUAK unF4bhIm7sXEScQ4WGYUNXQ71NTwbUAcd0uAQG/E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726955AbfKKQen (ORCPT ); Mon, 11 Nov 2019 11:34:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:50322 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726857AbfKKQem (ORCPT ); Mon, 11 Nov 2019 11:34:42 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CBAB120679; Mon, 11 Nov 2019 16:34:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573490082; bh=71g3I8FN9cKyEIsTndR2DMxU6WI8XxUlHgrraLIGuIc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RG0jimVqcUHNqvIGSi0ZuhfVzx3U/k5T+fSzVjs169asXkuXgHPGiSEIKIiu87KzV 1NcMwuP43uXMR93i3orZiBpWHQ9idYHFO9DepuS1z/wgpebwepoiU+Sy+OJs/DSL9E /Pjwt2k/i97uJKWLfBa8VFDvgXgt160ihfoeIfW8= Date: Mon, 11 Nov 2019 17:34:37 +0100 From: Greg Kroah-Hartman To: Tejun Heo Cc: Sasha Levin , stable@vger.kernel.org, Jens Axboe , linux-block@vger.kernel.org, cgroups@vger.kernel.org, kernel-team@fb.com, Li Zefan , Johannes Weiner , Jan Kara , Konstantin Khlebnikov , Dennis Zhou , Michal Hocko Subject: Re: [PATCH block/for-linus] cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead Message-ID: <20191111163437.GC1017642@kroah.com> References: <20191108201829.GA3728460@devbig004.ftw2.facebook.com> <20191111131544.GJ1396@dhcp22.suse.cz> <20191111161816.GA4163745@devbig004.ftw2.facebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191111161816.GA4163745@devbig004.ftw2.facebook.com> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Mon, Nov 11, 2019 at 08:18:16AM -0800, Tejun Heo wrote: > Hello, Michal. > > On Mon, Nov 11, 2019 at 02:15:44PM +0100, Michal Hocko wrote: > > > Signed-off-by: Tejun Heo > > > Cc: Dennis Zhou > > > Cc: Konstantin Khlebnikov > > > Fixes: e8a7abf5a5bd ("writeback: disassociate inodes from dying bdi_writebacks") > > > > Is this a stable material? > > c3aab9a0bd91 ("mm/filemap.c: don't initiate writeback if mapping has > no dirty pages") likely addresses larger part of the problem, but yeah > it prolly makes sense to backport both for -stable. > > Greg, Sasha, can you pick the following two commits for -stable? > > * c3aab9a0bd91 ("mm/filemap.c: don't initiate writeback if mapping has > no dirty pages") > > * 65de03e25138 ("cgroup,writeback: don't switch wbs immediately on > dead wbs if the memcg is dead") > > Both are fixes for e8a7abf5a5bd ("writeback: disassociate inodes from > dying bdi_writebacks") - v4.2+. Now queued up, thanks. greg k-h