On 03/11/2012 11:36 AM, Gleb Natapov wrote:
On Sat, Mar 10, 2012 at 12:47:26PM +0100, Igor Mammedov wrote:
Reduce amount of consumed cpu time (i.e. don't spin forever) if
number of started cpus are more then expected. And print a bug
message into debug port.
Signed-off-by: Igor Mammedov<imamm...@redhat.com>
---
src/smp.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/src/smp.c b/src/smp.c
index 8c077a1..9933ac6 100644
--- a/src/smp.c
+++ b/src/smp.c
@@ -115,8 +115,14 @@ smp_probe(void)
msleep(10);
} else {
u8 cmos_smp_count = inb_cmos(CMOS_BIOS_SMP_COUNT);
- while (cmos_smp_count + 1 != readl(&CountCPUs))
+ while (cmos_smp_count + 1 != readl(&CountCPUs)) {
+ if (cmos_smp_count + 1< readl(&CountCPUs)) {
+ dprintf(1, "BUG: Expected %d cpu(s) but %d cpus started\n",
+ cmos_smp_count + 1, readl(&CountCPUs));
Shouldn't we print it to the console too?
I'm not sure if it's possible to print at this stage, but I'll try and
re-post if it works.
+ hlt();
+ }
yield();
+ }
}
// Restore memory.
--
1.7.7.6
--
Gleb.
--
-----
Igor
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