On Mon, May 01, 2017 at 08:33:31PM +0200, Michael Kerrisk (man-pages) wrote: > 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@xxxxxxxxxxxxxxxxxx> > > --- > > 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. The patch only extends the description of UFFD_FEATURE_MISSING_SHMEM. The feature is indeed available from 4.11, but that is said a few lives above (line 136 in ioctl_userfaultfd.2) > Cheers, > > Michael > > > > -- > Michael Kerrisk > Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ > Linux/UNIX System Programming Training: http://man7.org/training/ > -- 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>
