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Assert that accounting for the pmap resident pages does not underflow.

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Reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2014-01-02 18:49:05 +00:00
parent d096f2f5a8
commit c0be75a58a
1 changed files with 3 additions and 0 deletions
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3
sys/amd64/amd64/pmap.c
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@ -608,6 +608,9 @@ pmap_resident_count_dec(pmap_t pmap, int count)
{ {
PMAP_LOCK_ASSERT(pmap, MA_OWNED); PMAP_LOCK_ASSERT(pmap, MA_OWNED);
KASSERT(pmap->pm_stats.resident_count >= count,
("pmap %p resident count underflow %ld %d", pmap,
pmap->pm_stats.resident_count, count));
pmap->pm_stats.resident_count -= count; pmap->pm_stats.resident_count -= count;
} }