Re: ceph-mds jewel backports leak

[Loic Dachary <loic@dachary.org>]

Hi John,

On 07/07/2016 12:54, John Spray wrote:
> On Wed, Jul 6, 2016 at 11:51 AM, Loic Dachary <loic@dachary.org> wrote:
>> Hi John,
>>
>> While testing the CephFS jewel backports found in the jewel-backports branch, we ran into a memory leak that consistently happen:
>>
>> http://pulpito.ceph.com/loic-2016-06-16_02:28:14-fs-jewel-backports---basic-smithi/263842
> 
> The client leak is a false positive, I'm not sure what is triggering
> it (it seems to only happen on centos nodes, and not be silenced by
> the suppression that we have in the valgrind config).
> http://tracker.ceph.com/issues/14794

Thanks for that, I'm relieved :-)

> Is it definitely not happening on the jewel branch, or is it possible
> that the jewel run just wasn't executing that test on centos nodes?

http://pulpito.ceph.com/loic-2016-06-28_23:43:39-fs-jewel---basic-smithi/282493/ is indeed running on Ubuntu

> 
> The MDS leaks are currently ignored in the ceph.py task (yuck!) so
> they're probably happening everywhere else too and you can ignore
> them.

And the reason why it show on jewel is probably because the ceph.py task in ceph-qa-suite jewel branch does not ignore leaks. I took notes so we remember it's a false positive http://tracker.ceph.com/issues/16344#note-9

Thanks !

> John
> 
>> and that is not present in the jewel branch
>>
>> http://pulpito.ceph.com/loic-2016-06-28_23:43:39-fs-jewel---basic-smithi/282493/
>>
>> Meaning one of the backports is doing something wrong. Or there is a backport fixing the leak that is missing.
>>
>> This one looks interesting to me
>>
>> https://github.com/ceph/ceph/commit/37b7b09ee19ad64362c2faf63461353c03a36ada
>>
>> There also are related to leaks but I'm not so sure.
>>
>> https://github.com/ceph/ceph/commit/89f74c98ea43df46291c8bec890b3a75c7ce38b4
>> https://github.com/ceph/ceph/commit/4c52bf9ed47d52510536ebc34bd6c56adba1df53
>>
>> If you have ideas on how to approach this and save random exploration time, it would be most welcome. If not, I'll get it eventually, no worries :-)
>>
>> Cheers
>>
>> --
>> Loïc Dachary, Artisan Logiciel Libre
> 

-- 
Loïc Dachary, Artisan Logiciel Libre
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