From: Peter Xu <peterx@redhat.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-man@vger.kernel.org
Cc: Axel Rasmussen <axelrasmussen@google.com>,
peterx@redhat.com, Nadav Amit <nadav.amit@gmail.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Alejandro Colomar <alx.manpages@gmail.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH v5 3/4] ioctl_userfaultfd.2: Add UFFD_FEATURE_THREAD_ID docs
Date: Mon, 29 Mar 2021 18:18:32 -0400 [thread overview]
Message-ID: <20210329221833.517923-4-peterx@redhat.com> (raw)
In-Reply-To: <20210329221833.517923-1-peterx@redhat.com>
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 --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
--
2.26.2
next prev parent reply other threads:[~2021-03-29 22:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 22:18 [PATCH v5 0/4] man2: udpate mm/userfaultfd manpages to latest Peter Xu
2021-03-29 22:18 ` [PATCH v5 1/4] userfaultfd.2: Add UFFD_FEATURE_THREAD_ID docs Peter Xu
2021-03-29 22:18 ` [PATCH v5 2/4] userfaultfd.2: Add write-protect mode Peter Xu
2021-03-29 22:18 ` Peter Xu [this message]
2021-03-29 22:18 ` [PATCH v5 4/4] ioctl_userfaultfd.2: Add write-protect mode docs Peter Xu
2021-04-01 12:00 ` [PATCH v5 0/4] man2: udpate mm/userfaultfd manpages to latest Alejandro Colomar (man-pages)
2021-04-05 11:50 ` Michael Kerrisk (man-pages)
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