On 05/02/2017 11:31 AM, Mike Rapoport wrote: > 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) Okay -- thanks for the clarification. 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>
