* [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
@ 2017-11-08 6:54 Mike Rapoport
2017-11-09 7:44 ` Michael Kerrisk (man-pages)
0 siblings, 1 reply; 3+ messages in thread
From: Mike Rapoport @ 2017-11-08 6:54 UTC (permalink / raw)
To: Michael Kerrisk; +Cc: Andrea Arcangeli, linux-man, linux-mm, Mike Rapoport
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
---
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
--
2.7.4
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
2017-11-08 6:54 [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK Mike Rapoport
@ 2017-11-09 7:44 ` Michael Kerrisk (man-pages)
0 siblings, 0 replies; 3+ messages in thread
From: Michael Kerrisk (man-pages) @ 2017-11-09 7:44 UTC (permalink / raw)
To: Mike Rapoport; +Cc: mtk.manpages, Andrea Arcangeli, linux-man, linux-mm
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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^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
@ 2017-10-26 13:04 Mike Rapoport
0 siblings, 0 replies; 3+ messages in thread
From: Mike Rapoport @ 2017-10-26 13:04 UTC (permalink / raw)
To: Michael Kerrisk; +Cc: Andrea Arcangeli, linux-mm, linux-man, Mike Rapoport
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
---
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
--
2.7.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
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2017-10-26 13:04 Mike Rapoport
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