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ioctl_userfaultfd.2: Update description of shared memory areas 

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Mike Rapoport 2017-05-01 08:43:15 +03:00 committed by Michael Kerrisk
parent 981ffc70eb
commit 41e9e6485a
1 changed files with 11 additions and 2 deletions
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13
man2/ioctl_userfaultfd.2
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@ -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