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Date:      Mon, 21 Sep 2020 17:06:37 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 246886] [sendfile] Nginx + NFS or FUSE causes VM stall
Message-ID:  <bug-246886-227-3fGxymrmtT@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-246886-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-246886-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246886

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

Sendfile seems to work fine, but using AIO/Nginx + MooseFS/FuseFS causes Ng=
inx
to hang.=20

Error message: kernel: pid 60903 (nginx) is attempting to use unsafe AIO
requests - not logging anymore.=20

Disabling AIO in Nginx works around the hang.=20

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.=20

I have not tried current yet.

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