d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't use MWAIT for short sleeps under XEN, as it was before r212541.

Browse Source 
This fixes panic during boot in PV mode on Xen 3.2.
This commit is contained in:
Alexander Motin 2011-05-07 12:27:25 +00:00
parent b8331e4264
commit d96fd07637
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=221599
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sys/i386/i386/machdep.c
View File

@ -1359,6 +1359,7 @@ cpu_idle(int busy)
if (mp_grab_cpu_hlt())
return;
#endif
#ifndef XEN
/* If we are busy - try to use fast methods. */
if (busy) {
if ((cpu_feature2 & CPUID2_MON) && idle_mwait) {
@ -1367,7 +1368,6 @@ cpu_idle(int busy)
}
}
#ifndef XEN
/* If we have time - switch timers into idle mode. */
if (!busy) {
critical_enter();
@ -1395,8 +1395,8 @@ cpu_idle(int busy)
cpu_activeclock();
critical_exit();
}
#endif
out:
#endif
CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done",
busy, curcpu);
}