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ioctl_userfaultfd.2: Minor tweaks to Mike Rapoport's patches 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2017-05-01 13:24:10 +02:00
parent be9021b1bb
commit 5191c68806
1 changed files with 14 additions and 15 deletions
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29
man2/ioctl_userfaultfd.2
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@ -184,14 +184,15 @@ If this feature bit is set,
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
.BR tmpfs (5),
shared mappings of
.IR /dev/zero ,
.BR mmap (2)
with the
.I MAP_SHARED
flag set,
.BR memfd_create (2),
etc.
and so on.
The returned
.I ioctls
@ -482,16 +483,14 @@ An invalid bit was specified in the
.IR mode
field.
.TP
.B ENOENT
(Since Linux 4.11)
.BR ENOENT " (since Linux 4.11)"
The faulting process has changed
its virtual memory layout simultaneously with outstanding
its virtual memory layout simultaneously with an outstanding
.I UFFDIO_COPY
operation.
.TP
.B ENOSPC
(Since Linux 4.11)
The faulting process has exited at the time of
.BR ENOSPC " (since Linux 4.11)"
The faulting process has exited at the time of a
.I UFFDIO_COPY
operation.
.\"
@ -652,13 +651,13 @@ See
.BR userfaultfd (2).
.SH BUGS
In order to detect available userfault features and
enable certain subset of those features
the usefault file descriptor must be closed after the first
enable some subset of those features
the userfaultfd file descriptor must be closed after the first
.BR UFFDIO_API
operation that queries features availability and re-opened before
operation that queries features availability and reopened before
the second
.BR UFFDIO_API
call that actually enables the desired features.
operation that actually enables the desired features.
.SH SEE ALSO
.BR ioctl (2),
.BR mmap (2),