[Gluster-devel] GlusterFS FUSE client leaks summary — part I

[Xavier Hernandez]

There's another inode leak caused by an incorrect counting of
lookups on directory reads.

Here's a patch that solves the problem for
3.7:

http://review.gluster.org/13324

Hopefully with this patch the
memory leaks should disapear.

Xavi

On 29.01.2016 19:09, Oleksandr
Natalenko wrote: 

> Here is intermediate summary of current memory
leaks in FUSE client 
> investigation.
> 
> I use GlusterFS v3.7.6
release with the following patches:
> 
> ===
> Kaleb S KEITHLEY (1):
>
fuse: use-after-free fix in fuse-bridge, revisited
> 
> Pranith Kumar K
(1):
> mount/fuse: Fix use-after-free crash
> 
> Soumya Koduri (3):
>
gfapi: Fix inode nlookup counts
> inode: Retire the inodes from the lru
list in inode_table_destroy
> upcall: free the xdr* allocations
> ===
>

> With those patches we got API leaks fixed (I hope, brief tests show
that) and 
> got rid of "kernel notifier loop terminated" message.
Nevertheless, FUSE 
> client still leaks.
> 
> I have several test
volumes with several million of small files (100K…2M in 
> average). I
do 2 types of FUSE client testing:
> 
> 1) find /mnt/volume -type d
> 2)
rsync -av -H /mnt/source_volume/* /mnt/target_volume/
> 
> And most
up-to-date results are shown below:
> 
> === find /mnt/volume -type d
===
> 
> Memory consumption: ~4G
> Statedump:
https://gist.github.com/10cde83c63f1b4f1dd7a
> Valgrind:
https://gist.github.com/097afb01ebb2c5e9e78d
> 
> I guess,
fuse-bridge/fuse-resolve. related.
> 
> === rsync -av -H
/mnt/source_volume/* /mnt/target_volume/ ===
> 
> Memory consumption:
~3.3...4G
> Statedump (target volume):
https://gist.github.com/31e43110eaa4da663435
> Valgrind (target volume):
https://gist.github.com/f8e0151a6878cacc9b1a
> 
> I guess,
DHT-related.
> 
> Give me more patches to test :).
>
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