[Bug 246886] [sendfile] Nginx + NFS or FUSE causes VM stall

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246886

--- Comment #51 from jSML4ThWwBID69YC at protonmail.com ---
(In reply to Alan Somers from comment #41)

Sendfile seems to work fine, but using AIO/Nginx + MooseFS/FuseFS causes Nginx
to hang. 

Error message: kernel: pid 60903 (nginx) is attempting to use unsafe AIO
requests - not logging anymore. 

Disabling AIO in Nginx works around the hang. 

The second Nginx issue is related to the fuse lookup cache. An error happens
when Nginx tries to write to a log file on a directory with an exceeded disk
quota. The disk quotas are being set by MooseFS.

Error message: kernel: fuse_vnop_lookup: WB cache incoherent on
/path/to/mfsmount point!

I'm not sure either of these are related to this bug anymore. I'd added
reference to this originally as it appeared Nginx+Fuse specific before. 

I have not tried current yet.

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