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Date:      Mon, 08 Aug 2016 17:43:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ports-bugs@FreeBSD.org
Subject:   [Bug 211674] sysutils/fusefs-ntfs: fuse_vnode leak/reclamation failure
Message-ID:  <bug-211674-13@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211674

            Bug ID: 211674
           Summary: sysutils/fusefs-ntfs: fuse_vnode leak/reclamation
                    failure
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs@FreeBSD.org
          Reporter: mqudsi@neosmart.net
                CC: freebsd@dussan.org
                CC: freebsd@dussan.org
             Flags: maintainer-feedback?(freebsd@dussan.org)

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 seem=
s 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

--=20
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