public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: "Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>
To: Milan Broz <mbroz@redhat.com>, Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>,
	Valdis.Kletnieks@vt.edu, Alexander Viro <viro@zeniv.linux.org.uk>,
	Neil Brown <neilb@suse.de>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-raid@vger.kernel.org,
	device-mapper development <dm-devel@redhat.com>,
	Kay Sievers <kay.sievers@vrfy.org>,
	Alasdair G Kergon <agk@redhat.com>
Subject: Re: [PATCH] block: restore multiple bd_link_disk_holder() support
Date: Fri, 14 Jan 2011 16:31:57 +0900	[thread overview]
Message-ID: <4D2FFBED.6010406@ce.jp.nec.com> (raw)
In-Reply-To: <4D2F4799.5030901@redhat.com>

Hi,

On 01/14/11 03:42, Milan Broz wrote:
>> Milan, Jun, can you guys please verify this works correctly for the
>> multi holder dm case?  Thank you.
> 
> Hi,
> 
> unfortunately not. And the problem is much worse,
> it breaks lvm resize operation completely.

For quick testing, try this:
("/dev/sdf" can be other block device.
 "testA" and "testB" can be other dm names which aren't used in
 your machine.)

# echo "0 10 linear /dev/sdf 0" | dmsetup create testA
# echo "0 10 linear /dev/sdf 10" | dmsetup create testB
(at this point, /dev/sdf has multiple holders)
# echo "0 20 linear /dev/sdf 10" | dmsetup load testB
(at this point, /dev/mapper/testB has 2 claims on /dev/sdf)
# dmsetup resume testB
(/dev/mapper/testB has 1 claim on /dev/sdf)
# dmsetup remove testA
# dmsetup remove testB


Thanks,
-- 
Jun'ichi Nomura, NEC Corporation

  reply	other threads:[~2011-01-14  7:39 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-12 17:34 linux-next - WARNING: at fs/block_dev.c:824 bd_link_disk_holder+0x92/0x1ac() Valdis.Kletnieks
2011-01-13  0:23 ` Milan Broz
2011-01-13  2:19   ` Jun'ichi Nomura
2011-01-13 11:06     ` Tejun Heo
2011-01-13 11:26       ` [dm-devel] " Milan Broz
2011-01-13 12:27         ` Karel Zak
2011-01-13 13:12           ` Tejun Heo
2011-01-13 13:26             ` Karel Zak
2011-01-13 13:37               ` Tejun Heo
2011-01-13 13:52                 ` Tejun Heo
2011-01-13 13:58                 ` Milan Broz
2011-01-13 14:11                   ` Tejun Heo
2011-01-13 14:25                     ` Milan Broz
2011-01-13 14:30                       ` Tejun Heo
2011-01-13 14:43                         ` Kay Sievers
2011-01-13 15:03                           ` Milan Broz
2011-01-14  7:38                             ` Jun'ichi Nomura
2011-01-13 15:59                           ` Karel Zak
2011-01-13 16:10                             ` Kay Sievers
2011-01-14 15:07                               ` Karel Zak
2011-01-14 15:23                                 ` Kay Sievers
2011-01-13 14:45                         ` Theodore Tso
2011-01-13 20:18                           ` NeilBrown
2011-01-13 20:41                             ` Ted Ts'o
2011-01-14 16:20                               ` Tejun Heo
2011-01-14 17:59                                 ` Ted Ts'o
2011-01-14 18:23                                   ` Tejun Heo
2011-01-13 14:49                         ` Milan Broz
2011-01-14 16:35                           ` Tejun Heo
2011-01-13 17:21     ` [PATCH] block: restore multiple bd_link_disk_holder() support Tejun Heo
2011-01-13 18:42       ` Milan Broz
2011-01-14  7:31         ` Jun'ichi Nomura [this message]
2011-01-14 16:10           ` [PATCH UPDATED] " Tejun Heo
2011-01-14 21:09             ` Milan Broz
2011-01-17  0:18               ` Jun'ichi Nomura

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4D2FFBED.6010406@ce.jp.nec.com \
    --to=j-nomura@ce.jp.nec.com \
    --cc=Valdis.Kletnieks@vt.edu \
    --cc=agk@redhat.com \
    --cc=axboe@kernel.dk \
    --cc=dm-devel@redhat.com \
    --cc=kay.sievers@vrfy.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-raid@vger.kernel.org \
    --cc=mbroz@redhat.com \
    --cc=neilb@suse.de \
    --cc=tj@kernel.org \
    --cc=viro@zeniv.linux.org.uk \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox