linux-kernel - Re: WARNING: CPU: 1 PID: 495 at mm/slab_common.c:69 kmem_cache

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Date:	Thu, 31 Jul 2014 17:02:19 +0400
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Christoph Hellwig <hch@....de>
Cc:	Mike Christie <michaelc@...wisc.edu>,
	poma <pomidorabelisima@...il.com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>,
	Mailing-List fedora-kernel <kernel@...ts.fedoraproject.org>,
	Paolo Bonzini <pbonzini@...hat.com>, linux-scsi@...r.kernel.org
Subject: Re: WARNING: CPU: 1 PID: 495 at mm/slab_common.c:69
 kmem_cache_create+0x1a9/0x330()

On Wed, 2014-07-30 at 19:59 +0200, Christoph Hellwig wrote:
> On Wed, Jul 30, 2014 at 12:22:11PM -0500, Mike Christie wrote:
> > Some drivers like qla2xxx do not set proc_name. I think if 2 drivers
> > like that are loaded then you will hit some other warns/bugs in the kmem
> > cache setup code right?
> 
> Drivers have to opt into using their own caches by setting .cmd_size
> in the host template.  We could enforce they set ->proc_name for them,
> but I'd rather keep the amount of sanity checks low unless there's a real
> need.

OK, so lets send this through normal merge window then we get time to
see if there's a problem before the backport to stable happens.

James


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