From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-fsdevel-owner@vger.kernel.org>
Received: from verein.lst.de ([213.95.11.211]:35083 "EHLO newverein.lst.de"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1751318AbdJXHqR (ORCPT <rfc822;linux-fsdevel@vger.kernel.org>);
        Tue, 24 Oct 2017 03:46:17 -0400
Date: Tue, 24 Oct 2017 09:46:15 +0200
From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Greg Edwards <gedwards@ddn.com>, linux-fsdevel@vger.kernel.org,
        Christoph Hellwig <hch@lst.de>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fs: guard_bio_eod() needs to consider partitions
Message-ID: <20171024074615.GA14396@lst.de>
References: <20171024011007.24855-1-gedwards@ddn.com> <20171024021636.GZ21978@ZenIV.linux.org.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20171024021636.GZ21978@ZenIV.linux.org.uk>
Sender: linux-fsdevel-owner@vger.kernel.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Tue, Oct 24, 2017 at 03:16:36AM +0100, Al Viro wrote:
> > Fixes: 74d46992e0d9 ("block: replace bi_bdev with a gendisk pointer and partitions index")
> > Signed-off-by: Greg Edwards <gedwards@ddn.com>
> 
> That smells like a nasty source of overhead, especially on SMP boxen...

We could just use __disk_get_part similar to the partition remapping,
or just pass the block_device to guard_bio_eod.