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uma: remove M_ZERO support for pcpu zones

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Nothing in the tree uses it and pcpu zones have a fundamentally different use
case than the regular zones - they are not supposed to be allocated and freed
all the time.

This reduces pollution in the allocation fast path.
This commit is contained in:
Mateusz Guzik 2018-06-08 03:16:16 +00:00
parent 4fb80c7008
commit ea99223ec9
1 changed files with 3 additions and 6 deletions
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9
sys/vm/uma_core.c
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@ -2256,6 +2256,8 @@ uma_zalloc_arg(uma_zone_t zone, void *udata, int flags)
}
KASSERT(curthread->td_critnest == 0 || SCHEDULER_STOPPED(),
("uma_zalloc_arg: called with spinlock or critical section held"));
if (zone->uz_flags & UMA_ZONE_PCPU)
MPASS((flags & M_ZERO) == 0);
#ifdef DEBUG_MEMGUARD
if (memguard_cmp_zone(zone)) {
@ -3604,13 +3606,8 @@ uma_large_free(uma_slab_t slab)
static void
uma_zero_item(void *item, uma_zone_t zone)
{
int i;
if (zone->uz_flags & UMA_ZONE_PCPU) {
CPU_FOREACH(i)
bzero(zpcpu_get_cpu(item, i), zone->uz_size);
} else
bzero(item, zone->uz_size);
bzero(item, zone->uz_size);
}
unsigned long