LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

ioctl_userfaultfd.2: Rework intro text on type of ioctl() operations 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-12-30 14:04:52 +01:00
parent 74bd6e931a
commit fe905357af
1 changed files with 19 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
man2/ioctl_userfaultfd.2
View File

@ -52,13 +52,27 @@ is one of the commands listed below, and
.I argp
is a pointer to a data structure that is specific to
.IR cmd .
.\"
.SS Configuration ioctl(2) operations
The
The various
.BR ioctl (2)
operations described below are used to configure userfaultfd behavior.
They allow the caller to choose what features will be enabled and
operations are described below.
The
.BR UFFDIO_API,
.BR UFFDIO_REGISTER ,
and
.BR UFFDIO_UNREGISTER
operations are used to
.I configure
userfaultfd behavior.
These operations allow the caller to choose what features will be enabled and
what kinds of events will be delivered to the application.
The remaining operations are
.IR range
operations.
These operations enable the calling application to resolve page fault
events in a consistent way.
.\" FIXME What does "consistent" mean?
.TP
.BR UFFDIO_API
Enable operation of the userfaultfd and perform API handshake.
@ -195,13 +209,6 @@ There as an incompatible mapping in the specified address range.
.B EINVAL
There was no mapping in the specified address range.
.RE
.\"
.SS Range ioctl(2) operations
The range
.BR ioctl (2)
operations enable the calling application to resolve page fault
events in a consistent way.
.\" FIXME What does "consistent" mean?
.TP
.B UFFDIO_COPY
Atomically copy a continuous memory chunk into the userfault registered