Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
