Date: Mon, 5 Sep 2016 14:26:30 -0600 From: Alan Somers <asomers@freebsd.org> To: Jim Ohlstein <jim@ohlste.in> Cc: FreeBSD Stable ML <freebsd-stable@freebsd.org> Subject: Re: AIO not working on NFS share - ? Regression Message-ID: <CAOtMX2iWaYq9ujgZ3bWx3YYo5ESgz5hp6epo=rbro7yDU2QESQ@mail.gmail.com> In-Reply-To: <6c9093cd-1323-77b1-b27e-f53b58ec86e4@ohlste.in> References: <6c9093cd-1323-77b1-b27e-f53b58ec86e4@ohlste.in>
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Just to get your webserver out of the picture, could you please try
running the aio test suite on an NFS share? Do it like this:
$ cd /usr/tests/sys/aio
$ export TMPFS=/path/to/some/nfs/share
$ kyua test
-Alan
On Mon, Sep 5, 2016 at 2:14 PM, Jim Ohlstein <jim@ohlste.in> wrote:
> Hello,
>
> For sometime now we've used a backend (non-internet accessible) server to
> generate static content that is shared via NFS to a front-end server for
> internet access. Both machines use ZFS exclusively.
>
> The webserver is nginx and we had AIO set to on, with the AIO module built
> into the kernel.In 10.x it "just worked".
>
> About two weeks ago I upgraded that backend machine to 11-STABLE in order to
> start building packages for 11. I've just updated it again to r305417. I
> don't recall it not working as expected.
>
> More recently I upgraded the front-end machine to 11-STABLE @r305311. Since
> then, AIO is not working and I get a critical error in the nginx logs like
> this:
>
> 2016/09/05 15:58:02 [crit] 21145#0: *649 aio_read("/path/to/file") failed
> (45: Operation not supported) while sending response to client ...
>
> In 11 AIO is built into the kernel by default, and I have confirmed that it
> works as expected in files from a local file system. Since the webserver
> isn't aware that the file system in question is shared via NFS, it seems
> this is an operating system issue.
>
> --
> Jim Ohlstein
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