[Samba] vfs_fruit and memory usage

Reindl Harald h.reindl at thelounge.net
Tue Apr 5 11:11:37 UTC 2016

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

at least the problem must exist longer because the case with 8 GB of 
physical RAM completly eaten was on CentOS 7 with 
samba-4.2.3-12.el7_2.x86_64 while todays issue happened on 

*maybe* you can reproduce it by copy a really large folder with many 
files and subfolders over a Mac client - on the other hand today it was 
triggered by afpd allocating memory and OOM-killer decided the process 
with largest memory usage is some smbd

not sure how smbd did grow that large because on the main fileserver 
apple clients only use netatalk for now which triggeres 
"fruit_fset_nt_acl: SMB_VFS_NEXT_FSET_NT_ACL failed" and like messages 
from time to time

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