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pcpu_page_alloc: guard against empty NUMA domains

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Some systems, such as higher end Threadripper, may have
NUMA domains with no physical memory, Don't allocate
from these domains.

This fixes a "panic: vm_wait in early boot" on my 2990WX desktop

Reviewed by:	jeff
Sponsored by:	Netflix
This commit is contained in:
Andrew Gallatin 2020-01-18 18:25:37 +00:00
parent 2888eb4091
commit 2052680238
1 changed files with 5 additions and 1 deletions
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6
sys/vm/uma_core.c
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@ -1521,7 +1521,11 @@ pcpu_page_alloc(uma_zone_t zone, vm_size_t bytes, int domain, uint8_t *pflag,
p = vm_page_alloc(NULL, 0, flags);
#else
pc = pcpu_find(cpu);
p = vm_page_alloc_domain(NULL, 0, pc->pc_domain, flags);
if (__predict_false(VM_DOMAIN_EMPTY(pc->pc_domain)))
p = NULL;
else
p = vm_page_alloc_domain(NULL, 0,
pc->pc_domain, flags);
if (__predict_false(p == NULL))
p = vm_page_alloc(NULL, 0, flags);
#endif