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membarrier.2: Minor fixes to Mathieu's patch 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2017-11-19 11:26:01 +01:00
parent 20fe250908
commit d1555345ef
1 changed files with 8 additions and 8 deletions
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16
man2/membarrier.2
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@ -88,24 +88,24 @@ order between entry to and return from the
system call. system call.
All threads on the system are targeted by this command. All threads on the system are targeted by this command.
.TP .TP
.B MEMBARRIER_CMD_PRIVATE_EXPEDITED .BR MEMBARRIER_CMD_PRIVATE_EXPEDITED " (since Linux 4.14)"
Execute a memory barrier on each running thread belonging to the same Execute a memory barrier on each running thread belonging to the same
process as the current thread. process as the current thread.
Upon return from system call, the caller Upon return from system call, the calling
thread is ensured that all its running threads siblings have passed thread is assured that all its running threads siblings have passed
through a state where all memory accesses to user-space addresses match through a state where all memory accesses to user-space addresses match
program order between entry to and return from the system call program order between entry to and return from the system call
(non-running threads are de facto in such a state). (non-running threads are de facto in such a state).
This only covers threads from the same process as the caller thread. This covers only threads from the same process as the calling thread.
The "expedited" commands complete faster than the non-expedited ones, .IP
The "expedited" commands complete faster than the non-expedited ones;
they never block, but have the downside of causing extra overhead. they never block, but have the downside of causing extra overhead.
A process needs to register its intent to use the private A process needs to register its intent to use the private
expedited command prior to using it. expedited command prior to using it.
.TP .TP
.B MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED .BR MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED " (since Linux 4.14)"
Register the process intent to use Register the process's intent to use
.BR MEMBARRIER_CMD_PRIVATE_EXPEDITED . .BR MEMBARRIER_CMD_PRIVATE_EXPEDITED .
.TP
.PP .PP
The The
.I flags .I flags