Author: kib
Date: Sun Aug 25 20:57:39 2019
New Revision: 351494
URL: https://svnweb.freebsd.org/changeset/base/351494
Log:
amd64: If domain-local page for pcpu cannot be allocated, keep use
existing one.
Allocation failure is possible for instance when cpu domain has no memory.
Reported and tested by: bcran
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/amd64/amd64/mp_machdep.c
Modified: head/sys/amd64/amd64/mp_machdep.c
==============================================================================
--- head/sys/amd64/amd64/mp_machdep.c Sun Aug 25 20:36:52 2019
(r351493)
+++ head/sys/amd64/amd64/mp_machdep.c Sun Aug 25 20:57:39 2019
(r351494)
@@ -402,6 +402,8 @@ mp_realloc_pcpu(int cpuid, int domain)
return;
m = vm_page_alloc_domain(NULL, 0, domain,
VM_ALLOC_NORMAL | VM_ALLOC_NOOBJ);
+ if (m == NULL)
+ return;
na = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m));
pagecopy((void *)oa, (void *)na);
pmap_qenter((vm_offset_t)&__pcpu[cpuid], &m, 1);
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