RESYNC Bug ? [was Re: Stop resync operation]

RESYNC Bug ? [was Re: Stop resync operation]

[d4lamar]

Dear Developers,

I am here again to ask you support about RESYNC operation.
In my first mail I asked if there were any method to stop a running RESYNC.

Now I am experiencing a very strange behaviour... RESYNC operation
exceeded 100% completion percentage...

# cat /proc/mdstat
Tue Nov 10 05:02:41 CET 2015
Personalities : [raid1] [raid10] [linear]
md66 : active linear md0[0]
2939452080 blocks super 1.2 4k rounding

md0 : active raid10 sdab[17](S) sdt[16](S) sdaj[0] sdx[12] sdai[11]
sdah[9] sdam[15] sdae[7] sdas[6] sdaa[5] sdap[4] sdao[3] sdaf[14]
sdz[1]
2939453104 blocks super 1.2 4K chunks 2 near-copies [14/12] [UUUUUUUUUU_UU_]
[=========================>] resync =129.9% (545894292/419921872)
finish=20192933978332.0min speed=7612K/sec
bitmap: 22/22 pages [88KB], 65536KB chunk

md65 : active raid1 sdal[0] sdar[1]
419921875 blocks super 1.2 [2/2] [UU]
bitmap: 0/4 pages [0KB], 65536KB chunk

unused devices: <none>

Are you aware of such possible behaviour ? Do you think I have just hit a BUG ?

Thanks and Best Regards,
d4lamar

2015-11-06 7:44 GMT+01:00 d4lamar <d4lamar@gmail.com>:
> Dear Developers,
>
> I have a question for you.
>
> I have a raid10 md array:
>
> Is it theoretically possible to stop a running resync operation and
> mark the array as clean without stopping the array ?
>
> I do not want the resync to be respawned automatically.
>
> Thanks and Best Regards,
> d4lamar

Re: RESYNC Bug ? [was Re: Stop resync operation]

[Anugraha Sinha]

Hi,

Could you share your kernel version and mdadm package version, please?

Regards
Anugraha

On 11/10/2015 1:13 PM, d4lamar wrote:
> Dear Developers,
>
> I am here again to ask you support about RESYNC operation.
> In my first mail I asked if there were any method to stop a running RESYNC.
>
> Now I am experiencing a very strange behaviour... RESYNC operation
> exceeded 100% completion percentage...
>
> # cat /proc/mdstat
> Tue Nov 10 05:02:41 CET 2015
> Personalities : [raid1] [raid10] [linear]
> md66 : active linear md0[0]
> 2939452080 blocks super 1.2 4k rounding
>
> md0 : active raid10 sdab[17](S) sdt[16](S) sdaj[0] sdx[12] sdai[11]
> sdah[9] sdam[15] sdae[7] sdas[6] sdaa[5] sdap[4] sdao[3] sdaf[14]
> sdz[1]
> 2939453104 blocks super 1.2 4K chunks 2 near-copies [14/12] [UUUUUUUUUU_UU_]
> [=========================>] resync =129.9% (545894292/419921872)
> finish=20192933978332.0min speed=7612K/sec
> bitmap: 22/22 pages [88KB], 65536KB chunk
>
> md65 : active raid1 sdal[0] sdar[1]
> 419921875 blocks super 1.2 [2/2] [UU]
> bitmap: 0/4 pages [0KB], 65536KB chunk
>
> unused devices: <none>
>
> Are you aware of such possible behaviour ? Do you think I have just hit a BUG ?
>
> Thanks and Best Regards,
> d4lamar
>
> 2015-11-06 7:44 GMT+01:00 d4lamar <d4lamar@gmail.com>:
>> Dear Developers,
>>
>> I have a question for you.
>>
>> I have a raid10 md array:
>>
>> Is it theoretically possible to stop a running resync operation and
>> mark the array as clean without stopping the array ?
>>
>> I do not want the resync to be respawned automatically.
>>
>> Thanks and Best Regards,
>> d4lamar
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Re: RESYNC Bug ? [was Re: Stop resync operation]

[d4lamar]

2015-11-10 5:26 GMT+01:00 Anugraha Sinha <asinha.mailinglist@gmail.com>:
> Hi,
>
> Could you share your kernel version and mdadm package version, please?

Of course.

2.6.32-220.7.1.el6.lustre.4033.x86_64
mdadm-3.2.2-9.xrtx.5.x86_64

Thanks,
d4lamar

> On 11/10/2015 1:13 PM, d4lamar wrote:
>>
>> Dear Developers,
>>
>> I am here again to ask you support about RESYNC operation.
>> In my first mail I asked if there were any method to stop a running
>> RESYNC.
>>
>> Now I am experiencing a very strange behaviour... RESYNC operation
>> exceeded 100% completion percentage...
>>
>> # cat /proc/mdstat
>> Tue Nov 10 05:02:41 CET 2015
>> Personalities : [raid1] [raid10] [linear]
>> md66 : active linear md0[0]
>> 2939452080 blocks super 1.2 4k rounding
>>
>> md0 : active raid10 sdab[17](S) sdt[16](S) sdaj[0] sdx[12] sdai[11]
>> sdah[9] sdam[15] sdae[7] sdas[6] sdaa[5] sdap[4] sdao[3] sdaf[14]
>> sdz[1]
>> 2939453104 blocks super 1.2 4K chunks 2 near-copies [14/12]
>> [UUUUUUUUUU_UU_]
>> [=========================>] resync =129.9% (545894292/419921872)
>> finish=20192933978332.0min speed=7612K/sec
>> bitmap: 22/22 pages [88KB], 65536KB chunk
>>
>> md65 : active raid1 sdal[0] sdar[1]
>> 419921875 blocks super 1.2 [2/2] [UU]
>> bitmap: 0/4 pages [0KB], 65536KB chunk
>>
>> unused devices: <none>
>>
>> Are you aware of such possible behaviour ? Do you think I have just hit a
>> BUG ?
>>
>> Thanks and Best Regards,
>> d4lamar
>>
>> 2015-11-06 7:44 GMT+01:00 d4lamar <d4lamar@gmail.com>:
>>>
>>> Dear Developers,
>>>
>>> I have a question for you.
>>>
>>> I have a raid10 md array:
>>>
>>> Is it theoretically possible to stop a running resync operation and
>>> mark the array as clean without stopping the array ?
>>>
>>> I do not want the resync to be respawned automatically.
>>>
>>> Thanks and Best Regards,
>>> d4lamar
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>

Re: RESYNC Bug ? [was Re: Stop resync operation]

[NeilBrown]

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On Tue, Nov 10 2015, d4lamar wrote:

> 2015-11-10 5:26 GMT+01:00 Anugraha Sinha <asinha.mailinglist@gmail.com>:
>> Hi,
>>
>> Could you share your kernel version and mdadm package version, please?
>
> Of course.
>
> 2.6.32-220.7.1.el6.lustre.4033.x86_64

This is a Redhat kernel based on a very old mainline kernel.
You are experiencing a kernel bug (which seems vaguely familiar by I
don't recall the details).
To get support for a Redhat kernel, you need to talk to Redhat.
If you want help here, you need to be running a kernel must closer to
current mainline.  It doesn't have to be the very latest, but something
released in the last year would be best.

NeilBrown



> mdadm-3.2.2-9.xrtx.5.x86_64
>
> Thanks,
> d4lamar
>
>> On 11/10/2015 1:13 PM, d4lamar wrote:
>>>
>>> Dear Developers,
>>>
>>> I am here again to ask you support about RESYNC operation.
>>> In my first mail I asked if there were any method to stop a running
>>> RESYNC.
>>>
>>> Now I am experiencing a very strange behaviour... RESYNC operation
>>> exceeded 100% completion percentage...
>>>
>>> # cat /proc/mdstat
>>> Tue Nov 10 05:02:41 CET 2015
>>> Personalities : [raid1] [raid10] [linear]
>>> md66 : active linear md0[0]
>>> 2939452080 blocks super 1.2 4k rounding
>>>
>>> md0 : active raid10 sdab[17](S) sdt[16](S) sdaj[0] sdx[12] sdai[11]
>>> sdah[9] sdam[15] sdae[7] sdas[6] sdaa[5] sdap[4] sdao[3] sdaf[14]
>>> sdz[1]
>>> 2939453104 blocks super 1.2 4K chunks 2 near-copies [14/12]
>>> [UUUUUUUUUU_UU_]
>>> [=========================>] resync =129.9% (545894292/419921872)
>>> finish=20192933978332.0min speed=7612K/sec
>>> bitmap: 22/22 pages [88KB], 65536KB chunk
>>>
>>> md65 : active raid1 sdal[0] sdar[1]
>>> 419921875 blocks super 1.2 [2/2] [UU]
>>> bitmap: 0/4 pages [0KB], 65536KB chunk
>>>
>>> unused devices: <none>
>>>
>>> Are you aware of such possible behaviour ? Do you think I have just hit a
>>> BUG ?
>>>
>>> Thanks and Best Regards,
>>> d4lamar
>>>
>>> 2015-11-06 7:44 GMT+01:00 d4lamar <d4lamar@gmail.com>:
>>>>
>>>> Dear Developers,
>>>>
>>>> I have a question for you.
>>>>
>>>> I have a raid10 md array:
>>>>
>>>> Is it theoretically possible to stop a running resync operation and
>>>> mark the array as clean without stopping the array ?
>>>>
>>>> I do not want the resync to be respawned automatically.
>>>>
>>>> Thanks and Best Regards,
>>>> d4lamar
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

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