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From: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
To: Alasdair Kergon <agk@redhat.com>
Cc: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>,
	Mike Snitzer <snitzer@redhat.com>,
	Heinz Mauelshagen <mauelshagen@redhat.com>,
	dm-devel@redhat.com, Mikulas Patocka <mpatocka@redhat.com>,
	Zdenek Kabelac <zkabelac@redhat.com>,
	Jun'ichi Nomura <j-nomura@ce.jp.nec.com>,
	Milan Broz <mbroz@redhat.com>
Subject: Re: dm: bind new table before destroying old
Date: Thu, 12 Nov 2009 18:59:20 +0900	[thread overview]
Message-ID: <4AFBDC78.5040801@ct.jp.nec.com> (raw)
In-Reply-To: <20091111151110.GO17055@agk-dp.fab.redhat.com>

Hi Alasdair,

On 11/12/2009 12:11 AM +0900, Alasdair G Kergon wrote:
> On Wed, Nov 11, 2009 at 03:56:05PM +0900, Kiyoshi Ueda wrote:
>> I believe dm-mpath needs to flush such workqueues in postsuspend.
> 
> Yes - should be an easy change.

OK, I posted the patch.
See: http://patchwork.kernel.org/patch/59556/


>> Also, we need something to block message ioctl to suspended device.
>  
>> As for the message ioctl, I don't have any good idea, but...
>>   - Reject message ioctl to suspended device in dm-ioctl
> 
> I think the crypt target expects to be able to do this to manipulate
> the in-core encryption key.
> 
>>   - Targets must not kick any work influencing external themselves
>>     in their message ioctl handlers.
> 
> So I think we'll need a target-specific approach like that here.

OK, Mike Anderson seems to be working on this.

Thanks,
Kiyoshi Ueda

  parent reply	other threads:[~2009-11-12  9:59 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-11  1:16 dm: bind new table before destroying old Alasdair G Kergon
2009-11-11  1:20 ` Alasdair G Kergon
2009-11-11  2:48   ` dm: keep old table until after resume succeeded Alasdair G Kergon
2009-11-11  6:56 ` dm: bind new table before destroying old Kiyoshi Ueda
2009-11-11 15:11   ` Alasdair G Kergon
2009-11-11 15:14     ` Milan Broz
2009-11-12  7:00       ` Mike Anderson
2009-11-12  9:59     ` Kiyoshi Ueda [this message]
2009-11-11 13:20 ` Mike Snitzer
2009-11-11 23:45   ` Mike Snitzer
2009-11-19  0:50     ` Alasdair G Kergon
2009-11-19  2:51       ` malahal
2009-11-19 12:49         ` Mikulas Patocka

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