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=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 E95E5C43461 for ; Wed, 16 Sep 2020 09:29:25 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2E55222210 for ; Wed, 16 Sep 2020 09:29:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2E55222210 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 731E16B0055; Wed, 16 Sep 2020 05:29:24 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6E2DA6B005A; Wed, 16 Sep 2020 05:29:24 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5F71E6B005C; Wed, 16 Sep 2020 05:29:24 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0194.hostedemail.com [216.40.44.194]) by kanga.kvack.org (Postfix) with ESMTP id 46DFC6B0055 for ; Wed, 16 Sep 2020 05:29:24 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 050BC824999B for ; Wed, 16 Sep 2020 09:29:24 +0000 (UTC) X-FDA: 77268401448.02.lace14_620c5bb27118 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin02.hostedemail.com (Postfix) with ESMTP id D149A101141E1 for ; Wed, 16 Sep 2020 09:29:23 +0000 (UTC) X-HE-Tag: lace14_620c5bb27118 X-Filterd-Recvd-Size: 2539 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf27.hostedemail.com (Postfix) with ESMTP for ; Wed, 16 Sep 2020 09:29:23 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 5A4AFABD1; Wed, 16 Sep 2020 09:29:37 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 0C0D8DA7C7; Wed, 16 Sep 2020 11:28:09 +0200 (CEST) Date: Wed, 16 Sep 2020 11:28:09 +0200 From: David Sterba To: Christoph Hellwig Cc: Jens Axboe , Song Liu , Hans de Goede , Richard Weinberger , Minchan Kim , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@tron.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Johannes Thumshirn Subject: Re: [PATCH 07/12] bdi: remove BDI_CAP_CGROUP_WRITEBACK Message-ID: <20200916092809.GJ1791@twin.jikos.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, Christoph Hellwig , Jens Axboe , Song Liu , Hans de Goede , Richard Weinberger , Minchan Kim , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@tron.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Johannes Thumshirn References: <20200910144833.742260-1-hch@lst.de> <20200910144833.742260-8-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200910144833.742260-8-hch@lst.de> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) X-Rspamd-Queue-Id: D149A101141E1 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Sep 10, 2020 at 04:48:27PM +0200, Christoph Hellwig wrote: > Just checking SB_I_CGROUPWB for cgroup writeback support is enough. > Either the file system allocates its own bdi (e.g. btrfs), in which case > it is known to support cgroup writeback, or the bdi comes from the block > layer, which always supports cgroup writeback. > > Signed-off-by: Christoph Hellwig > Reviewed-by: Johannes Thumshirn Acked-by: David Sterba