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ioctl_userfaultfd.2: Add UFFD_FEATURE_THREAD_ID docs 

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>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Peter Xu 2021-04-05 15:13:07 +02:00 committed by Michael Kerrisk
parent 4b338b38e6
commit fbda69bbdd
1 changed files with 5 additions and 0 deletions
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5
man2/ioctl_userfaultfd.2
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@ -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