[Gluster-users] [Gluster-devel] Memory leak in GlusterFS FUSE client

[Xavier Hernandez]

I'm seeing a similar problem with 3.7.6.

This latest statedump contains a lot of gf_fuse_mt_invalidate_node_t 
objects in fuse. Looking at the code I see they are used to send 
invalidations to kernel fuse, however this is done in a separate thread 
that writes a log message when it exits. On the system I'm seeing the 
memory leak, I can see that message in the log files:

[2016-01-18 23:04:55.384873] I [fuse-bridge.c:3875:notify_kernel_loop] 
0-glusterfs-fuse: kernel notifier loop terminated

But the volume is still working at this moment, so any future inode 
invalidations will leak memory because it was this thread that should 
release it.

Can you check if you also see this message in the mount log ?

It seems that this thread terminates if write returns any error 
different than ENOENT. I'm not sure if there could be any other error 
that can cause this.

Xavi

On 20/01/16 00:13, Oleksandr Natalenko wrote:
> Here is another RAM usage stats and statedump of GlusterFS mount approaching
> to just another OOM:
>
> ===
> root     32495  1.4 88.3 4943868 1697316 ?     Ssl  Jan13 129:18 /usr/sbin/
> glusterfs --volfile-server=server.example.com --volfile-id=volume /mnt/volume
> ===
>
> https://gist.github.com/86198201c79e927b46bd
>
> 1.6G of RAM just for almost idle mount (we occasionally store Asterisk
> recordings there). Triple OOM for 69 days of uptime.
>
> Any thoughts?
>
> On середа, 13 січня 2016 р. 16:26:59 EET Soumya Koduri wrote:
>> kill -USR1
>
>
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