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 S1754061AbcEBOwl (ORCPT <rfc822;w@1wt.eu>);
	Mon, 2 May 2016 10:52:41 -0400
Received: from bombadil.infradead.org ([198.137.202.9]:56683 "EHLO
	bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752211AbcEBOwd (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 2 May 2016 10:52:33 -0400
Date: Mon, 2 May 2016 07:52:32 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Ming Lei <ming.lei@canonical.com>
Cc: Jens Axboe <axboe@fb.com>, linux-kernel@vger.kernel.org,
        linux-block@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
        linux-btrfs@vger.kernel.org,
        "open list:FILESYSTEMS (VFS and infrastructure)" 
	<linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH v3 0/3] block: avoid to call .bi_end_io() recursively
Message-ID: <20160502145232.GC20589@infradead.org>
References: <1461805743-3559-1-git-send-email-ming.lei@canonical.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1461805743-3559-1-git-send-email-ming.lei@canonical.com>
User-Agent: Mutt/1.5.24 (2015-08-30)
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, Apr 28, 2016 at 09:09:00AM +0800, Ming Lei wrote:
> The 3rd patch avoids to call .bi_end_io recursively in complete path.

Care to explain what the reason for doing that is?

If we have excessively long bi_end_io chains we should probably look
into fixing them instead.