From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752318AbaE0Q0T (ORCPT <rfc822;w@1wt.eu>);
	Tue, 27 May 2014 12:26:19 -0400
Received: from mx1.redhat.com ([209.132.183.28]:32994 "EHLO mx1.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751250AbaE0Q0Q (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 27 May 2014 12:26:16 -0400
Date: Tue, 27 May 2014 12:26:12 -0400 (EDT)
From: Mikulas Patocka <mpatocka@redhat.com>
X-X-Sender: mpatocka@file01.intranet.prod.int.rdu2.redhat.com
To: Jens Axboe <axboe@kernel.dk>
cc: Kent Overstreet <kmo@daterainc.com>, linux-kernel@vger.kernel.org,
        dm-devel@redhat.com, "Alasdair G. Kergon" <agk@redhat.com>,
        Mike Snitzer <msnitzer@redhat.com>
Subject: Re: [PATCH] block: flush queued bios when the process blocks
In-Reply-To: <5384B26D.1000703@kernel.dk>
Message-ID: <alpine.LRH.2.02.1405271222150.8745@file01.intranet.prod.int.rdu2.redhat.com>
References: <alpine.LRH.2.02.1405271059190.27492@file01.intranet.prod.int.rdu2.redhat.com> <5384AA79.4010206@kernel.dk> <alpine.LRH.2.02.1405271120390.31404@file01.intranet.prod.int.rdu2.redhat.com> <5384B26D.1000703@kernel.dk>
User-Agent: Alpine 2.02 (LRH 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, 27 May 2014, Jens Axboe wrote:

> On 2014-05-27 09:23, Mikulas Patocka wrote:
> 
> > The patch adds bio list flushing to the scheduler just besides plug
> > flushsing.
> 
> ... which is exactly why I'm commenting. It'd be great to avoid yet one more
> scheduler hook for this sort of thing.
> 
> -- 
> Jens Axboe

One could create something like schedule notifier chain, but I'm not sure 
if it is worth the complexity because of just two users. If more users 
come in the future, it could be generalized.

Mikulas