linux-kernel - Re: Regression in 3.15 on POWER8 with multipath SCSI

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Message-ID: <53B24DE3.9050108@suse.de>
Date:	Tue, 01 Jul 2014 07:57:55 +0200
From:	Hannes Reinecke <hare@...e.de>
To:	Paul Mackerras <paulus@...ba.org>
CC:	dm-devel@...hat.com, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, Vladimir Davydov <vdavydov@...allels.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kay Sievers <kay.sievers@...y.org>
Subject: Re: Regression in 3.15 on POWER8 with multipath SCSI

On 06/30/2014 11:28 PM, Paul Mackerras wrote:
> On Mon, Jun 30, 2014 at 01:35:20PM +0200, Hannes Reinecke wrote:
>> On 06/30/2014 01:02 PM, Paul Mackerras wrote:
[ .. ]
>>>
>>> No, I'm not using LVM, and in fact I deleted all the physical volumes
>>> that were on any of the disks (they were installations of other
>>> distros), so there are no physical or logical volumes anywhere on any
>>> disk.  I haven't tried disabling the LVM service completely, though.
>>> What would it mean if disabling the LVM service made a difference?
>>>
>> Yes. LVM integration with systemd is a science unto itself.
>> I'm reasonably confident with multipath, but not LVM.
>> Plus the fact the the LVM service apparently is waiting for something sort
>> of points into that direction.
>>
>> So please do disable the lvm service.
>
> I disabled the LVM service, and it's still bad.  Unmodified 3.15
> booted successfully in only 18 out of 50 attempts with LVM disabled.
>
> So it's not LVM.  In any case LVM was fine with a 3.14 kernel.
>
Right, that was just a cross-check to eliminate any variables.

I'll be checking here at my end.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@...e.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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