From: Andres Freund <[email protected]>
To: Andy Lutomirski <[email protected]>
Cc: Jens Axboe <[email protected]>,
Stefano Garzarella <[email protected]>,
Christoph Hellwig <[email protected]>, Kees Cook <[email protected]>,
Pavel Begunkov <[email protected]>,
Miklos Szeredi <[email protected]>,
Matthew Wilcox <[email protected]>,
Jann Horn <[email protected]>,
Christian Brauner <[email protected]>,
[email protected], [email protected],
Linux API <[email protected]>,
Linux FS Devel <[email protected]>,
LKML <[email protected]>,
Michael Kerrisk <[email protected]>,
Stefan Hajnoczi <[email protected]>
Subject: Re: strace of io_uring events?
Date: Tue, 21 Jul 2020 12:56:02 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <CALCETrV_tOziNJOp8xanmCU0yJEHcGQk0TBxeiK4U7AVewkgAw@mail.gmail.com>
Hi,
On 2020-07-21 12:44:09 -0700, Andy Lutomirski wrote:
> Can you enlighten me? I don't see any iov_iter_get_pages() calls or
> equivalents. If an IO is punted, how does the data end up in the
> io_uring_enter() caller's mm?
For operations needing that io_op_def.needs_mm is true. Which is checked
by io_prep_async_work(), adding the current mm to req. On the wq side
io_wq_switch_mm() uses that mm when executing the queue entry.
Greetings,
Andres Freund
next prev parent reply other threads:[~2020-07-21 19:56 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-15 11:12 strace of io_uring events? Miklos Szeredi
2020-07-15 14:35 ` Andy Lutomirski
2020-07-15 17:11 ` Matthew Wilcox
2020-07-15 19:42 ` Pavel Begunkov
2020-07-15 20:09 ` Miklos Szeredi
2020-07-15 20:20 ` Pavel Begunkov
2020-07-15 23:07 ` Kees Cook
2020-07-16 13:14 ` Stefano Garzarella
2020-07-16 15:12 ` Kees Cook
2020-07-17 8:01 ` Stefano Garzarella
2020-07-21 15:27 ` Andy Lutomirski
2020-07-21 15:31 ` Jens Axboe
2020-07-21 17:23 ` Andy Lutomirski
2020-07-21 17:30 ` Jens Axboe
2020-07-21 17:44 ` Andy Lutomirski
2020-07-21 18:39 ` Jens Axboe
2020-07-21 19:44 ` Andy Lutomirski
2020-07-21 19:48 ` Jens Axboe
2020-07-21 19:56 ` Andres Freund [this message]
2020-07-21 19:37 ` Andres Freund
2020-07-21 15:58 ` Stefano Garzarella
2020-07-23 10:39 ` Stefan Hajnoczi
2020-07-23 13:37 ` Colin Walters
2020-07-24 7:25 ` Stefano Garzarella
2020-07-16 13:17 ` Aleksa Sarai
2020-07-16 15:19 ` Kees Cook
2020-07-17 8:17 ` Cyril Hrubis
2020-07-16 16:24 ` Andy Lutomirski
2020-07-16 0:12 ` tytso
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