* RAID corruption with kernel 3.2?
@ 2012-02-12 2:47 H. Peter Anvin
2012-02-12 4:14 ` Mathias Burén
0 siblings, 1 reply; 6+ messages in thread
From: H. Peter Anvin @ 2012-02-12 2:47 UTC (permalink / raw)
To: Linux RAID Mailing List
Has anyone seen RAID-5 or -6 corruption with kernel 3.2 on systems
previously stable? If so, please let me know your hardware
configuration... we're trying to track down a problem, and RAID *might*
be part of it...
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: RAID corruption with kernel 3.2?
2012-02-12 2:47 RAID corruption with kernel 3.2? H. Peter Anvin
@ 2012-02-12 4:14 ` Mathias Burén
2012-02-12 4:43 ` H. Peter Anvin
0 siblings, 1 reply; 6+ messages in thread
From: Mathias Burén @ 2012-02-12 4:14 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Linux RAID Mailing List
On 12 February 2012 02:47, H. Peter Anvin <hpa@zytor.com> wrote:
> Has anyone seen RAID-5 or -6 corruption with kernel 3.2 on systems
> previously stable? If so, please let me know your hardware
> configuration... we're trying to track down a problem, and RAID *might*
> be part of it...
>
> -hpa
>
> --
> H. Peter Anvin, Intel Open Source Technology Center
> I work for Intel. I don't speak on their behalf.
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
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Details? My >3.2 RAID6 still works fine.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: RAID corruption with kernel 3.2?
2012-02-12 4:14 ` Mathias Burén
@ 2012-02-12 4:43 ` H. Peter Anvin
2012-02-12 4:53 ` Mathias Burén
2012-02-12 16:06 ` Holger Kiehl
0 siblings, 2 replies; 6+ messages in thread
From: H. Peter Anvin @ 2012-02-12 4:43 UTC (permalink / raw)
To: Mathias Burén; +Cc: Linux RAID Mailing List
On 02/11/2012 08:14 PM, Mathias Burén wrote:
>
> Details? My>3.2 RAID6 still works fine.
>
What is your hardware configuration? Especially your CPU?
The current suspicion -- but we don't know yet -- is that this is a
problem on Sandy Bridge and some Penryn CPUs which have the XSAVE
instruction, but we might very well be completely wrong on that.
-hpa
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: RAID corruption with kernel 3.2?
2012-02-12 4:43 ` H. Peter Anvin
@ 2012-02-12 4:53 ` Mathias Burén
2012-02-12 16:06 ` Holger Kiehl
1 sibling, 0 replies; 6+ messages in thread
From: Mathias Burén @ 2012-02-12 4:53 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Linux RAID Mailing List
On 12 February 2012 04:43, H. Peter Anvin <hpa@zytor.com> wrote:
> On 02/11/2012 08:14 PM, Mathias Burén wrote:
>>
>>
>> Details? My>3.2 RAID6 still works fine.
>>
>
> What is your hardware configuration? Especially your CPU?
>
> The current suspicion -- but we don't know yet -- is that this is a problem
> on Sandy Bridge and some Penryn CPUs which have the XSAVE instruction, but
> we might very well be completely wrong on that.
>
> -hpa
The CPU is an old Intel Atom, so nothing special. 3.2.5 with CK patches.
Mathias
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: RAID corruption with kernel 3.2?
2012-02-12 4:43 ` H. Peter Anvin
2012-02-12 4:53 ` Mathias Burén
@ 2012-02-12 16:06 ` Holger Kiehl
2012-02-12 18:00 ` H. Peter Anvin
1 sibling, 1 reply; 6+ messages in thread
From: Holger Kiehl @ 2012-02-12 16:06 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Linux RAID Mailing List
[-- Attachment #1: Type: TEXT/PLAIN, Size: 2596 bytes --]
Hello,
On Sat, 11 Feb 2012, H. Peter Anvin wrote:
> On 02/11/2012 08:14 PM, Mathias Burén wrote:
>>
>> Details? My>3.2 RAID6 still works fine.
>>
>
> What is your hardware configuration? Especially your CPU?
>
> The current suspicion -- but we don't know yet -- is that this is a problem
> on Sandy Bridge and some Penryn CPUs which have the XSAVE instruction, but we
> might very well be completely wrong on that.
>
I have NOT seen any corruptions. Have a dual CPU (8 cores) system with
the following CPU:
cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU X5460 @ 3.16GHz
stepping : 10
microcode : 0xa07
cpu MHz : 1999.000
cache size : 6144 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 xsave lahf_lm dts tpr_shadow vnmi flexpriority
bogomips : 6317.90
clflush size : 64
cache_alignment : 64
address sizes : 38 bits physical, 48 bits virtual
power management:
Has the following softraids:
cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md3 : active raid1 sdf2[1] sdc2[0]
70613632 blocks [2/2] [UU]
md1 : active raid1 sdd2[1] sda2[0]
70613632 blocks [2/2] [UU]
md2 : active raid1 sdb2[0] sde2[1]
70613632 blocks [2/2] [UU]
md4 : active raid6 sdn1[7] sdm1[6] sdk1[4] sdl1[5] sdh1[1] sdj1[3] sdi1[2] sdg1[0]
1754480640 blocks level 6, 2048k chunk, algorithm 2 [8/8] [UUUUUUUU]
md0 : active raid1 sdb1[1] sdd1[3] sdf1[5] sde1[4] sdc1[2] sda1[0]
521984 blocks [6/6] [UUUUUU]
The devices under md4 are hardware raid1 on two external SAS boxes.
Kernel currently is 3.2.1 with some security fixes. This system distributes
daily more then 5 TiB (9 million files) and so far no one has reported
any problems to me. I have several other systems with the same CPU (lower
clock) and software Raid6 but with local attached disks. They also have
no problems. Kernels there are 3.2.5.
Regards,
Holger
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: RAID corruption with kernel 3.2?
2012-02-12 16:06 ` Holger Kiehl
@ 2012-02-12 18:00 ` H. Peter Anvin
0 siblings, 0 replies; 6+ messages in thread
From: H. Peter Anvin @ 2012-02-12 18:00 UTC (permalink / raw)
To: Holger Kiehl; +Cc: Linux RAID Mailing List
On 02/12/2012 08:06 AM, Holger Kiehl wrote:
>>
>> The current suspicion -- but we don't know yet -- is that this is a
>> problem on Sandy Bridge and some Penryn CPUs which have the XSAVE
>> instruction, but we might very well be completely wrong on that.
>>
> I have NOT seen any corruptions. Have a dual CPU (8 cores) system with
> the following CPU:
>
> cat /proc/cpuinfo
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 6
> model : 23
> model name : Intel(R) Xeon(R) CPU X5460 @ 3.16GHz
> stepping : 10
> microcode : 0xa07
> cpu MHz : 1999.000
> cache size : 6144 KB
> physical id : 0
> siblings : 4
> core id : 0
> cpu cores : 4
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
> pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
> syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl
> aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
> dca sse4_1 xsave lahf_lm dts tpr_shadow vnmi flexpriority
> bogomips : 6317.90
> clflush size : 64
> cache_alignment : 64
> address sizes : 38 bits physical, 48 bits virtual
> power management:
>
Okay, so that's Penryn, it has XSAVE but not XSAVEOPT. Very interesting
data point, I appreciate the info!
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-02-12 18:00 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2012-02-12 2:47 RAID corruption with kernel 3.2? H. Peter Anvin
2012-02-12 4:14 ` Mathias Burén
2012-02-12 4:43 ` H. Peter Anvin
2012-02-12 4:53 ` Mathias Burén
2012-02-12 16:06 ` Holger Kiehl
2012-02-12 18:00 ` H. Peter Anvin
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