Bug 211674
| Summary: | sysutils/fusefs-ntfs: fuse_vnode leak/reclamation failure | ||
|---|---|---|---|
| Product: | Ports & Packages | Reporter: | Mahmoud Al-Qudsi <mqudsi> |
| Component: | Individual Port(s) | Assignee: | freebsd-ports-bugs (Nobody) <ports-bugs> |
| Status: | Open --- | ||
| Severity: | Affects Some People | CC: | arved, asomers, freebsd, w.schwarzenfeld |
| Priority: | --- | Keywords: | needs-qa |
| Version: | Latest | Flags: | bugzilla:
maintainer-feedback?
(freebsd) |
| Hardware: | Any | ||
| OS: | Any | ||
Is this still relevant? The fact that fuse_msgbuf is high indicates that the FUSE server isn't responding to some commands. However, you shouldn't read anything into the fuse_vnode memory. That doesn't get freed until VOP_RECLAIM, which won't happen unless another file system needs those vnodes. So I think this is a bug in the port, not the kernel. However, I will try to reproduce it if you give me some better instructions. Being unfamiliar with fuse-ntfs3g, I need more detailed reproduction instructions. Include which packages to install, the command for formatting a new disk, and how to fill the filesystem. |
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