Messages in this thread | | | Subject | Re: [PATCH man-pages 1/5] ioctl_userfaultfd.2: update description of shared memory areas | From | "Michael Kerrisk (man-pages)" <> | Date | Mon, 1 May 2017 20:33:31 +0200 |
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Hello Mike,
I've applied this patch, but have a question.
On 05/01/2017 07:43 AM, Mike Rapoport wrote: > Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> > --- > man2/ioctl_userfaultfd.2 | 13 +++++++++++-- > 1 file changed, 11 insertions(+), 2 deletions(-) > > diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2 > index 889feb9..6edd396 100644 > --- a/man2/ioctl_userfaultfd.2 > +++ b/man2/ioctl_userfaultfd.2 > @@ -181,8 +181,17 @@ virtual memory areas > .TP > .B UFFD_FEATURE_MISSING_SHMEM > If this feature bit is set, > -the kernel supports registering userfaultfd ranges on tmpfs > -virtual memory areas > +the kernel supports registering userfaultfd ranges on shared memory areas. > +This includes all kernel shared memory APIs: > +System V shared memory, > +tmpfs, > +/dev/zero, > +.BR mmap(2) > +with > +.I MAP_SHARED > +flag set, > +.BR memfd_create (2), > +etc. > > The returned > .I ioctls
Does the change in this patch represent a change that occurred in Linux 4.11? If so, I think this needs to be said explicitly in the text.
Cheers,
Michael
-- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
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