[Samba] vfs_fruit and memory usage

[Reindl Harald]

Am 05.04.2016 um 13:22 schrieb Ralph Boehme:
>> Am 05.04.2016 um 13:03 schrieb Ralph Boehme:
>>> On Tue, Apr 05, 2016 at 12:43:37PM +0200, Reindl Harald wrote:
>>>> what is wasting that much RAM if vfs_fruit is enabled?
>>>>
>>>> had 4 OOM-killers today after not face a single one in the last 7 years and
>>>> on a different machine i swa a smbd process eating up 6500 MB on a HP
>>>> Microserver with 8 GB RAM due copy a 300 GB folder with a Apple client and
>>>> even not release the memory after the operation was finished
>>>>
>>>> root     24301  1.9 22.3 1323692 903600 ?      SN   12:29   0:13
>>>> /usr/sbin/smbd -D
>>>>
>>>> samba-4.3.6-0.fc23.x86_64
>>>
>>> just got a private mail from someone else who ran into the same issue.
>>>
>>> Can you run smbd under valgrind with memcheck?
>>
>> not that easy in production and it seems to be unpredictable to trigger
>
> it was mentioned that it is reproducible by deleting files and folders

for sure it's enough copy a folder with many elements, the crash below 
was my boss trying to copy a folder with 880 files over a slow VPN 
tunnel which produced 3 crashes so far and given that i raised the RAM 
of the virtual machine yesterday from 4 GB to 5 GB there is no end in 
ressource usage until it crashs

Apr  6 14:16:14 fileserver kernel: Out of memory: Kill process 9190 
(smbd) score 552 or sacrifice child
Apr  6 14:16:14 fileserver kernel: Killed process 9190 (smbd) 
total-vm:3370368kB, anon-rss:2730796kB, file-rss:1292kB
Apr  6 14:43:41 fileserver kernel: afpd invoked oom-killer: 
gfp_mask=0x24201ca, order=0, oom_score_adj=0

Apr  6 14:16:14 fileserver kernel: Out of memory: Kill process 9190 
(smbd) score 552 or sacrifice child
Apr  6 14:43:42 fileserver kernel: Out of memory: Kill process 11611 
(smbd) score 552 or sacrifice child
Apr  6 15:34:28 fileserver kernel: Out of memory: Kill process 12022 
(smbd) score 549 or sacrifice child

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