On Sat, 21 Apr 2012 15:55:15 +0200 Jan Ceuleers [off-list ref]
wrote:

Hi

Ever since I installed a 3.2 kernel on my Ubuntu  11.04 system, dmesg 
began being flooed with messages such as the following:

[15746.465106]  disk 1, wo:0, o:1, dev:sdb2
[15748.100302] RAID1 conf printout:
[15748.100306]  --- wd:2 rd:2
[15748.100310]  disk 0, wo:0, o:1, dev:sdd2
[15748.100313]  disk 1, wo:0, o:1, dev:sdb2
[15748.438638] RAID1 conf printout:
[15748.438642]  --- wd:2 rd:2
[15748.438646]  disk 0, wo:0, o:1, dev:sdd2
[15748.438649]  disk 1, wo:0, o:1, dev:sdb2
[15751.181020] RAID1 conf printout:
[15751.181026]  --- wd:2 rd:2
[15751.181030]  disk 0, wo:0, o:1, dev:sdd2
[15751.181034]  disk 1, wo:0, o:1, dev:sdb2
[15751.630244] RAID1 conf printout:
[15751.630250]  --- wd:2 rd:2
[15751.630255]  disk 0, wo:0, o:1, dev:sdd2
[15751.630259]  disk 1, wo:0, o:1, dev:sdb2
[15754.004658] RAID1 conf printout:
[15754.004662]  --- wd:2 rd:2
[15754.004666]  disk 0, wo:0, o:1, dev:sdd2
[15754.004670]  disk 1, wo:0, o:1, dev:sdb2
[15754.312749] RAID1 conf printout:
[15754.312754]  --- wd:2 rd:2
[15754.312758]  disk 0, wo:0, o:1, dev:sdd2
[15754.312762]  disk 1, wo:0, o:1, dev:sdb2
[15759.231107] RAID1 conf printout:
[15759.231112]  --- wd:2 rd:2
[15759.231115]  disk 0, wo:0, o:1, dev:sdd2
[15759.231118]  disk 1, wo:0, o:1, dev:sdb2

(etc, ad infinitum)

I'm now running a 3.3 kernel and it's still happening. My RAID sets are 
working just fine; it's just this nuisance log spamming that's annoying.

Anything I can do about that?

Best thing you can do it report it and hope some maintainer notices and helps
out.   Oh wait, you did that :-)

Looks like:

   commit 7bfec5f35c68121e7b1849f3f4166dd96c8da5b3

is at fault.  It causes md to attempt to add spares into the array more often.
Would I be right in guessing that you have one spare in this array?
If you remove the spare, the messages should stop.

I think I know how I'll fix it but it'll have to wait for tomorrow.  Then
I'll send you a patch to test.

Thanks for the report,
NeilBrown

root@zotac:~# uname -a
Linux zotac 3.3.2-030302-generic #201204131335 SMP Fri Apr 13 17:36:17 
UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
root@zotac:~# mdadm -V
mdadm - v3.1.4 - 31st August 2010


Thanks, Jan
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