* [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
@ 2017-11-08 6:54 Mike Rapoport
[not found] ` <1510124048-7991-1-git-send-email-rppt-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
0 siblings, 1 reply; 5+ 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] 5+ messages in thread
* [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
@ 2017-10-26 13:04 ` Mike Rapoport
0 siblings, 0 replies; 5+ 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-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
---
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 from this list: send the line "unsubscribe linux-man" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK
@ 2017-10-26 13:04 ` Mike Rapoport
0 siblings, 0 replies; 5+ 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/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-11-09 7:44 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2017-11-08 6:54 [PATCH] userfaultfd.2: document spurious UFFD_EVENT_FORK Mike Rapoport
[not found] ` <1510124048-7991-1-git-send-email-rppt-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-11-09 7:44 ` Michael Kerrisk (man-pages)
2017-11-09 7:44 ` Michael Kerrisk (man-pages)
-- strict thread matches above, loose matches on Subject: below --
2017-10-26 13:04 Mike Rapoport
2017-10-26 13:04 ` Mike Rapoport
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