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From: William Dauchy <>
To: Jens Axboe <>
Subject: Re: SQPOLL behaviour with openat
Date: Sat, 4 Jan 2020 17:41:50 +0100
Message-ID: <> (raw)
In-Reply-To: <>

Hello Jens,

Thank you for the quick answer.

On Sat, Jan 4, 2020 at 5:28 PM Jens Axboe <> wrote:
> sqpoll requires the use of fixed files for any sqe, at least for now.
> That's why it returns -EBADF if the request doesn't have fixed files
> specified.

 I indeed forgot sqe->flags |= IOSQE_FIXED_FILE; in my modified test.

> So it cannot be used with opcodes that create (or close) file
> descriptors either.

ok, I thought `dirfd` could have been the index of my registered fd
for `openat` call. It was not very clear to me this was not possible
to use fixed files for those opcodes.


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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-04 16:22 wdauchy
2020-01-04 16:28 ` Jens Axboe
2020-01-04 16:41   ` William Dauchy [this message]
2020-01-04 17:41     ` Jens Axboe

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