Date: Mon, 8 Aug 2016 12:48:15 -0500 From: "Mahmoud Al-Qudsi" <mqudsi@neosmart.net> To: <freebsd-fs@freebsd.org> Subject: PR-211674, fuse_vnode and fuse_msgbuf leak in fusefs-ntfs Message-ID: <012c01d1f19d$0aae9c70$200bd550$@neosmart.net>
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Hello,
Please forgive me if it is not correct form to discuss fusefs-ntfs on =
the FreeBSD fs mailing list.
SUMMARY
Running on FreeBSD 10.3-RELEASE-p6/i386 with fuse compiled into kernel =
and with fusefs-ntfs 2016.2.22 installed, there is a fuse_vnode leak =
(though it seems it may be more of a complete failure to reclaim vnodes) =
resulting in quick resource exhaustion.
REPRODUCTION
This is easily reproduced with the following:
ntfs-3g /dev/xxx /mnt/yyyy
cd /mnt/yyyy
find . -exec touch {} \;
In another virtual terminal:
vmstat | head -n1; vmstat -m | sed 1d | sort -hk 3,3
ACTUAL RESULTS
fuse_vnode will continuously balloon, and will not be reclaimed until =
the filesystem is unmounted.
(likewise, fuse_msgbuff also balloons but unlike fuse_vnode, it is never =
reclaimed. Separate PR?)
EXPECTED RESULTS
fuse_vnode entries should be reclaimed
ADDITIONAL INFORMATION
Here's a snapshot of the fuse-related vmstat entries after this process:
fuse_vnode 36020 9005K - 502349 256
fuse_msgbuf 58141 14895K - 311095 256,512,1024,2048,4096,8192
Thank you,
Mahmoud Al-Qudsi
NeoSmart Technologies
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