From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw0-f198.google.com (mail-yw0-f198.google.com [209.85.161.198]) by kanga.kvack.org (Postfix) with ESMTP id A54756B0003 for ; Wed, 30 May 2018 11:58:27 -0400 (EDT) Received: by mail-yw0-f198.google.com with SMTP id s12-v6so12720966ywl.13 for ; Wed, 30 May 2018 08:58:27 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id g78-v6sor2207557yba.52.2018.05.30.08.58.26 for (Google Transport Security); Wed, 30 May 2018 08:58:26 -0700 (PDT) Date: Wed, 30 May 2018 08:58:24 -0700 From: Tejun Heo Subject: Re: [PATCH 04/13] blk: introduce REQ_SWAP Message-ID: <20180530155824.GL1351649@devbig577.frc2.facebook.com> References: <20180529211724.4531-1-josef@toxicpanda.com> <20180529211724.4531-5-josef@toxicpanda.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180529211724.4531-5-josef@toxicpanda.com> Sender: owner-linux-mm@kvack.org List-ID: To: Josef Bacik Cc: axboe@kernel.dk, kernel-team@fb.com, linux-block@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Josef Bacik On Tue, May 29, 2018 at 05:17:15PM -0400, Josef Bacik wrote: > From: Josef Bacik > > Just like REQ_META, it's important to know the IO coming down is swap > in order to guard against potential IO priority inversion issues with > cgroups. Add REQ_SWAP and use it for all swap IO, and add it to our > bio_issue_as_root_blkg helper. > > Signed-off-by: Josef Bacik Acked-by: Tejun Heo Thanks. -- tejun