Author: gallatin
Date: Sat Jan 18 18:25:37 2020
New Revision: 356866
URL: https://svnweb.freebsd.org/changeset/base/356866
Log:
pcpu_page_alloc: guard against empty NUMA domains
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
Modified:
head/sys/vm/uma_core.c
Modified: head/sys/vm/uma_core.c
==============================================================================
--- head/sys/vm/uma_core.c Sat Jan 18 10:55:38 2020 (r356865)
+++ head/sys/vm/uma_core.c Sat Jan 18 18:25:37 2020 (r356866)
@@ -1521,7 +1521,11 @@ pcpu_page_alloc(uma_zone_t zone, vm_size_t bytes, int
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
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