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Date:      Mon, 21 Sep 2020 18:40:01 +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-alizGcNhIB@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 #57 from jSML4ThWwBID69YC@protonmail.com ---
(In reply to Alan Somers from comment #55)

I've tested three options in the nginx.conf.=20

sendfile on;
This works as expected.=20

aio on;=20
This causes content not to load. Nginx keeps running, but does not seem to =
read
files from disk. Here's an error from /var/log/nginx/error.log.=20

"2020/09/21 18:16:18 [crit] 83947#100590: *592
aio_read("/path/to/public_html/test.html") failed (45: Operation not suppor=
ted)
while sending response to client, client: 10.0.0.102<snip>"

aio threads;
This also seems to work as expected. I'm not sure why threads works, but no=
rmal
aio does not.=20

Setting vfs.aio.enable_unsafe=3D1 made no difference in the results.=20

For this test data is stored on MooseFS. Duplicating the test on ZFS does n=
ot
show the same issue.=20

FreeBSD 12.1-RELEASE-p10 GENERIC  amd64
nginx version: nginx/1.18.0
built with OpenSSL 1.1.1g  21 Apr 2020
TLS SNI support enabled

Should I open this as a separate bug still?

--=20
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