Am 4/28/2014 13:44, schrieb Erik Faye-Lund: > On Mon, Apr 28, 2014 at 1:42 PM, Stepan Kasal wrote: >> From: Paolo Bonzini >> Date: Mon, 21 May 2012 09:52:42 +0200 >> >> Backported from Gnulib. >> >> 2012-05-21 Paolo Bonzini >> >> poll/select: prevent busy-waiting. SwitchToThread() only gives away >> the rest of the current time slice to another thread in the current >> process. So if the thread that feeds the file decscriptor we're >> polling is not in the current process, we get busy-waiting. >> * lib/poll.c: Use SleepEx(1, TRUE) instead of SwitchToThread(). >> Patch from Theodore Leblond. >> * lib/select.c: Split polling out of the loop that sets the output >> fd_sets. Check for zero result and loop if the wait timeout is >> infinite. >> >> Signed-off-by: Stepan Kasal >> --- >> compat/poll/poll.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/compat/poll/poll.c b/compat/poll/poll.c >> index 31163f2..a9b41d8 100644 >> --- a/compat/poll/poll.c >> +++ b/compat/poll/poll.c >> @@ -605,7 +605,7 @@ restart: >> >> if (!rc && timeout == INFTIM) >> { >> - SwitchToThread(); >> + SleepEx (1, TRUE); >> goto restart; >> } >> >> -- >> 1.9.2.msysgit.0.158.g6070cee >> > > Thanks for taking the effort! > > Acked-by: Erik Faye-Lund The patch text has my ACK, too (I've been using it since 2 years now), but I very much prefer the commit message of the earlier post. GNU standards w.r.t. commit messages are simply sub-par. ;-) -- Hannes -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html