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Allow releasing APs to take more time, as long as we are making progress.

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On large core count machines this can be slow while all the CPUs update
the online counter.

Sponsored by:	DARPA, AFRL
Sponsored by:	Cavium (Hardware)
This commit is contained in:
Andrew Turner 2018-02-28 16:03:40 +00:00
parent 5373a0ae90
commit e9c0572e4c
1 changed files with 14 additions and 3 deletions
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17
sys/arm64/arm64/mp_machdep.c
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@ -221,7 +221,7 @@ arm64_cpu_attach(device_t dev)
static void
release_aps(void *dummy __unused)
{
int i;
int i, started;
/* Only release CPUs if they exist */
if (mp_ncpus == 1)
@ -241,11 +241,22 @@ release_aps(void *dummy __unused)
"sev \n"
::: "memory");
printf("Release APs\n");
printf("Release APs...");
started = 0;
for (i = 0; i < 2000; i++) {
if (smp_started)
if (smp_started) {
printf("done\n");
return;
}
/*
* Don't time out while we are making progress. Some large
* systems can take a while to start all CPUs.
*/
if (smp_cpus > started) {
i = 0;
started = smp_cpus;
}
DELAY(1000);
}