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From: Nikolaus Rath <Nikolaus@rath.org>
To: fuse-devel <fuse-devel@lists.sourceforge.net>,
        Miklos Szeredi <mszeredi@redhat.com>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
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        Tahsin Erdogan <tahsin@google.com>,
        Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: Reading from fuse pipe fails with EBADFD
References: <8736rmb728.fsf@vostro.rath.org>
Date: Tue, 04 Dec 2018 09:03:16 +0000
In-Reply-To: <8736rmb728.fsf@vostro.rath.org> (Nikolaus Rath's message of
        "Tue, 27 Nov 2018 20:26:39 +0000")
Message-ID: <875zw97jfv.fsf@thinkpad.rath.org>
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Hi,

Really no one any suggestion for debugging this?

(Adding some more people who recently worked on fs/fuse)

Best,
-Nikolaus

On Nov 27 2018, Nikolaus Rath <Nikolaus@rath.org> wrote:
> Hi,
>
> When testing FUSE under heavy load, I am occasionally getting EBADFD
> errors when reading from the fuse pipe.
>
> Does anyone have an idea what might cause this, and how to debug it
> further?
>
> Unfortunately I can't tell if this happens upon read() or upon
> splice(). I've extended the code now, so the next time it happens I will
> be able to tell.
>
> I am testing with kernel 4.15 from Ubuntu Bionic.
>
> So far this has happened twice in about 3 hours of testing. For the
> testing, I am repeatedly running the same 3 workloads, without
> remounting. Each workload takes ~ 15-30 seconds.
>
> Best,
> -Nikolaus
>
> --=20
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>
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