From: David Ahern <david.ahern@oracle.com>
To: David Rientjes <rientjes@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: 4.0.0-rc4: panic in free_block
Date: Fri, 20 Mar 2015 18:39:20 -0600 [thread overview]
Message-ID: <550CBDB8.1090501@oracle.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1503201731560.22072@chino.kir.corp.google.com>
On 3/20/15 6:34 PM, David Rientjes wrote:
> On Fri, 20 Mar 2015, David Ahern wrote:
>
>> Here's another data point: If I disable NUMA I don't see the problem.
>> Performance drops, but no NULL pointer splats which would have been panics.
>>
>> The 128 cpu ldom with NUMA enabled shows the problem every single time I do a
>> kernel compile (-j 128). With NUMA disabled I have done 3 allyesconfig
>> compiles without hitting the problem. I'll put the compiles into a loop while
>> I head out for dinner.
>>
>
> It might be helpful to enable CONFIG_DEBUG_SLAB if you're reproducing it.
>
I enabled that and a few other DEBUG configs earlier -- nothing popped
out. I'll do it again -- and others when I return.
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WARNING: multiple messages have this Message-ID (diff)
From: David Ahern <david.ahern@oracle.com>
To: David Rientjes <rientjes@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: 4.0.0-rc4: panic in free_block
Date: Fri, 20 Mar 2015 18:39:20 -0600 [thread overview]
Message-ID: <550CBDB8.1090501@oracle.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1503201731560.22072@chino.kir.corp.google.com>
On 3/20/15 6:34 PM, David Rientjes wrote:
> On Fri, 20 Mar 2015, David Ahern wrote:
>
>> Here's another data point: If I disable NUMA I don't see the problem.
>> Performance drops, but no NULL pointer splats which would have been panics.
>>
>> The 128 cpu ldom with NUMA enabled shows the problem every single time I do a
>> kernel compile (-j 128). With NUMA disabled I have done 3 allyesconfig
>> compiles without hitting the problem. I'll put the compiles into a loop while
>> I head out for dinner.
>>
>
> It might be helpful to enable CONFIG_DEBUG_SLAB if you're reproducing it.
>
I enabled that and a few other DEBUG configs earlier -- nothing popped
out. I'll do it again -- and others when I return.
next prev parent reply other threads:[~2015-03-21 0:48 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 15:07 4.0.0-rc4: panic in free_block David Ahern
2015-03-20 15:07 ` David Ahern
2015-03-20 16:48 ` Linus Torvalds
2015-03-20 16:48 ` Linus Torvalds
2015-03-20 16:48 ` Linus Torvalds
2015-03-20 16:53 ` David Ahern
2015-03-20 16:53 ` David Ahern
2015-03-20 16:53 ` David Ahern
2015-03-20 16:58 ` Linus Torvalds
2015-03-20 16:58 ` Linus Torvalds
2015-03-20 16:58 ` Linus Torvalds
2015-03-20 18:05 ` David Ahern
2015-03-20 18:05 ` David Ahern
2015-03-20 18:05 ` David Ahern
2015-03-20 18:53 ` Linus Torvalds
2015-03-20 18:53 ` Linus Torvalds
2015-03-20 18:53 ` Linus Torvalds
2015-03-20 19:04 ` David Ahern
2015-03-20 19:04 ` David Ahern
2015-03-20 19:04 ` David Ahern
2015-03-20 19:47 ` David Miller
2015-03-20 19:47 ` David Miller
2015-03-20 19:47 ` David Miller
2015-03-20 19:54 ` David Ahern
2015-03-20 19:54 ` David Ahern
2015-03-20 19:54 ` David Ahern
2015-03-20 20:19 ` David Miller
2015-03-20 20:19 ` David Miller
2015-03-20 20:19 ` David Miller
2015-03-20 19:42 ` David Miller
2015-03-20 19:42 ` David Miller
2015-03-20 19:42 ` David Miller
2015-03-20 20:01 ` Dave Hansen
2015-03-20 20:01 ` Dave Hansen
2015-03-20 20:01 ` Dave Hansen
2015-03-20 21:17 ` Linus Torvalds
2015-03-20 21:17 ` Linus Torvalds
2015-03-20 22:49 ` David Ahern
2015-03-20 22:49 ` David Ahern
2015-03-21 0:18 ` David Ahern
2015-03-21 0:18 ` David Ahern
2015-03-21 0:34 ` David Rientjes
2015-03-21 0:34 ` David Rientjes
2015-03-21 0:39 ` David Ahern [this message]
2015-03-21 0:39 ` David Ahern
2015-03-21 0:47 ` Linus Torvalds
2015-03-21 0:47 ` Linus Torvalds
2015-03-21 17:45 ` David Ahern
2015-03-21 17:45 ` David Ahern
2015-03-21 18:49 ` Linus Torvalds
2015-03-21 18:49 ` Linus Torvalds
2015-03-21 18:49 ` Linus Torvalds
2015-03-22 17:36 ` David Miller
2015-03-22 17:36 ` David Miller
2015-03-22 17:36 ` David Miller
2015-03-22 19:25 ` Bob Picco
2015-03-22 19:25 ` Bob Picco
2015-03-22 19:25 ` Bob Picco
2015-03-22 19:47 ` Linus Torvalds
2015-03-22 19:47 ` Linus Torvalds
2015-03-22 19:47 ` Linus Torvalds
2015-03-22 22:23 ` David Miller
2015-03-22 22:23 ` David Miller
2015-03-22 22:23 ` David Miller
2015-03-22 23:35 ` David Ahern
2015-03-22 23:35 ` David Ahern
2015-03-22 23:35 ` David Ahern
2015-03-22 23:54 ` David Miller
2015-03-22 23:54 ` David Miller
2015-03-22 23:54 ` David Miller
2015-03-23 0:03 ` David Ahern
2015-03-23 0:03 ` David Ahern
2015-03-23 0:03 ` David Ahern
2015-03-23 2:00 ` David Miller
2015-03-23 2:00 ` David Miller
2015-03-23 2:00 ` David Miller
2015-03-23 2:19 ` David Miller
2015-03-23 2:19 ` David Miller
2015-03-23 2:19 ` David Miller
2015-03-23 16:25 ` David Miller
2015-03-23 16:25 ` David Miller
2015-03-23 16:25 ` David Miller
2015-03-23 16:51 ` John Stoffel
2015-03-23 16:51 ` John Stoffel
2015-03-23 16:51 ` John Stoffel
2015-03-23 19:16 ` David Miller
2015-03-23 19:16 ` David Miller
2015-03-23 19:16 ` David Miller
2015-03-23 19:56 ` John Stoffel
2015-03-23 19:56 ` John Stoffel
2015-03-23 19:56 ` John Stoffel
2015-03-23 20:08 ` David Miller
2015-03-23 20:08 ` David Miller
2015-03-23 20:08 ` David Miller
2015-03-23 17:00 ` Linus Torvalds
2015-03-23 17:00 ` Linus Torvalds
2015-03-23 17:00 ` Linus Torvalds
2015-03-23 19:08 ` David Miller
2015-03-23 19:08 ` David Miller
2015-03-23 19:08 ` David Miller
2015-03-23 19:47 ` Linus Torvalds
2015-03-23 19:47 ` Linus Torvalds
2015-03-23 19:47 ` Linus Torvalds
2015-03-23 19:52 ` David Miller
2015-03-23 19:52 ` David Miller
2015-03-23 19:52 ` David Miller
2015-03-23 17:34 ` David Ahern
2015-03-23 17:34 ` David Ahern
2015-03-23 17:34 ` David Ahern
2015-03-23 19:35 ` David Miller
2015-03-23 19:35 ` David Miller
2015-03-23 19:35 ` David Miller
2015-03-23 19:58 ` David Ahern
2015-03-23 19:58 ` David Ahern
2015-03-23 19:58 ` David Ahern
2015-03-24 1:01 ` David Ahern
2015-03-24 1:01 ` David Ahern
2015-03-24 1:01 ` David Ahern
2015-03-24 14:57 ` Bob Picco
2015-03-24 14:57 ` Bob Picco
2015-03-24 14:57 ` Bob Picco
2015-03-24 16:05 ` David Miller
2015-03-24 16:05 ` David Miller
2015-03-24 16:05 ` David Miller
2015-03-22 23:49 ` Linus Torvalds
2015-03-22 23:49 ` Linus Torvalds
2015-03-22 23:49 ` Linus Torvalds
2015-03-22 23:57 ` David Miller
2015-03-22 23:57 ` David Miller
2015-03-22 23:57 ` David Miller
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