diff mbox series

[v5,3/4] ioctl_userfaultfd.2: Add UFFD_FEATURE_THREAD_ID docs

Message ID 20210329221833.517923-4-peterx@redhat.com (mailing list archive)
State New, archived
Headers show
Series man2: udpate mm/userfaultfd manpages to latest | expand

Commit Message

Peter Xu March 29, 2021, 10:18 p.m. UTC 
UFFD_FEATURE_THREAD_ID is supported in Linux 4.14.

Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 man2/ioctl_userfaultfd.2 | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2
index 47ae5f473..d4a8375b8 100644
--- a/man2/ioctl_userfaultfd.2
+++ b/man2/ioctl_userfaultfd.2
@@ -208,6 +208,11 @@  signal will be sent to the faulting process.
 Applications using this
 feature will not require the use of a userfaultfd monitor for processing
 memory accesses to the regions registered with userfaultfd.
+.TP
+.BR UFFD_FEATURE_THREAD_ID " (since Linux 4.14)"
+If this feature bit is set,
+.I uffd_msg.pagefault.feat.ptid
+will be set to the faulted thread ID for each page fault message.
 .PP
 The returned
 .I ioctls