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ZONE(9): Fix uma_zone_set_max()

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Account for items provided for per-processor caches.
This commit is contained in:
Sebastian Huber
2016-04-26 15:02:00 +02:00
parent a8e84c62ae
commit b988014362
1 changed files with 9 additions and 0 deletions
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9
freebsd/sys/vm/uma_core.c
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@@ -3016,6 +3016,15 @@ uma_zone_set_max(uma_zone_t zone, int nitems)
if (keg == NULL) if (keg == NULL)
return (0); return (0);
KEG_LOCK(keg); KEG_LOCK(keg);
#ifdef __rtems__
#ifdef SMP
/*
* Ensure we have enough items to fill the per-processor caches. This
* is a heuristic approach and works not under all conditions.
*/
nitems += 2 * BUCKET_MAX * (mp_maxid + 1);
#endif
#endif /* __rtems__ */
keg->uk_maxpages = (nitems / keg->uk_ipers) * keg->uk_ppera; keg->uk_maxpages = (nitems / keg->uk_ipers) * keg->uk_ppera;
if (keg->uk_maxpages * keg->uk_ipers < nitems) if (keg->uk_maxpages * keg->uk_ipers < nitems)
keg->uk_maxpages += keg->uk_ppera; keg->uk_maxpages += keg->uk_ppera;