From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
To: Mel Gorman <mgorman@suse.de>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
srikar@linux.vnet.ibm.com, aarcange@redhat.com, mingo@kernel.org,
riel@redhat.com
Subject: Re: NUMA Autobalancing Kernel 3.8
Date: Tue, 02 Apr 2013 13:41:34 +0200 [thread overview]
Message-ID: <515AC3EE.1030803@profihost.ag> (raw)
In-Reply-To: <20130402104844.GE32241@suse.de>
Am 02.04.2013 12:48, schrieb Mel Gorman:
> On Tue, Apr 02, 2013 at 09:24:51AM +0200, Stefan Priebe - Profihost AG wrote:
>> Hello list,
>>
>> i was trying to play with the new NUMA autobalancing feature of Kernel 3.8.
>>
>> But if i enable:
>> CONFIG_ARCH_USES_NUMA_PROT_NONE=y
>> CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y
>> CONFIG_NUMA_BALANCING=y
>>
>> i see random process crashes mostly in libc using vanilla 3.8.4.
>>
>
> Any more details than that? What sort of crashes? Anything in the kernel
> log? Any particular pattern to the crashes? Any means of reliably
> reproducing it? 3.8 vanilla, 3.8-stable or 3.8 with any other patches
> applied?
Sorry for missing information.
> Any more details than that?
Sadly not i just see a crash line in the kernel log - see below.
> What sort of crashes?
Mostly the processes just die but i've also seen processes consuming
100% CPU all the time or even just doing nothing anymore.
> Anything in the kernel log?
Three examples:
pigz[10194]: segfault at 0 ip (null) sp 00007f6197ffed50 error
14 in pigz[400000+e000]
rbd[2811]: segfault at b8 ip 00007f73c2d51b9e sp 00007f73bcae3b40 error
4 in librados.so.2.0.0[7f73c2afe000+3b9000]
rbd[1805]: segfault at 0 ip 00007f60c28dceb4 sp 00007f60b7ffd1f8 error 4
in ld-2.11.3.so[7f60c28cc000+1e000]
> Any particular pattern to the crashes? Any means of reliably
> reproducing it?
No i just need to run some task and after some time they die or hang
forever. I have this on 10 different E5-2640 and also on E56XX. I can
"fix" this by:
1.) putting all memory to just ONE CPU
2.) Disable NUMA Balancing
> 3.8 vanilla, 3.8-stable or 3.8 with any other patches
> applied?
3.8.4 without any patches.
Greets,
Stefan
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next prev parent reply other threads:[~2013-04-02 11:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-02 7:24 NUMA Autobalancing Kernel 3.8 Stefan Priebe - Profihost AG
2013-04-02 10:48 ` Mel Gorman
2013-04-02 11:41 ` Stefan Priebe - Profihost AG [this message]
2013-04-02 12:54 ` Mel Gorman
2013-04-02 14:34 ` Stefan Priebe - Profihost AG
2013-04-03 14:03 ` Mel Gorman
2013-04-03 14:11 ` Stefan Priebe - Profihost AG
2013-04-05 12:00 ` Mel Gorman
2013-04-05 12:10 ` Stefan Priebe - Profihost AG
2013-04-08 8:13 ` Mel Gorman
2013-04-08 9:14 ` Stefan Priebe - Profihost AG
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