From: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
To: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: mtk.manpages@gmail.com, Andrea Arcangeli <aarcange@redhat.com>,
linux-man@vger.kernel.org, linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
Date: Thu, 9 Nov 2017 08:44:47 +0100 [thread overview]
Message-ID: <1b812837-b368-5e6e-ff9d-7d570354437a@gmail.com> (raw)
In-Reply-To: <1510124048-7991-1-git-send-email-rppt@linux.vnet.ibm.com>
On 11/08/2017 07:54 AM, Mike Rapoport wrote:
> Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Thanks, Mike. Applied.
Cheers,
Michael
> ---
> man2/userfaultfd.2 | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/man2/userfaultfd.2 b/man2/userfaultfd.2
> index 1c9e64b..08c41e1 100644
> --- a/man2/userfaultfd.2
> +++ b/man2/userfaultfd.2
> @@ -465,6 +465,16 @@ for checkpoint/restore mechanisms,
> as well as post-copy migration to allow (nearly) uninterrupted execution
> when transferring virtual machines and Linux containers
> from one host to another.
> +.SH BUGS
> +If the
> +.B UFFD_FEATURE_EVENT_FORK
> +is enabled and a system call from the
> +.BR fork (2)
> +family is interrupted by a signal or failed,q a stale userfaultfd descriptor
> +might be created.
> +In this case a spurious
> +.B UFFD_EVENT_FORK
> +will be delivered to the userfaultfd monitor.
> .SH EXAMPLE
> The program below demonstrates the use of the userfaultfd mechanism.
> The program creates two threads, one of which acts as the
>
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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next prev parent reply other threads:[~2017-11-09 7:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-08 6:54 [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK Mike Rapoport
2017-11-09 7:44 ` Michael Kerrisk (man-pages) [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-10-26 13:04 Mike Rapoport
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