KVM: PPC: Enable use of secondary htab bucket

We had code to make use of the secondary htab buckets, but kept that
disabled because it was unstable when I put it in.

I checked again if that's still the case and apparently it was only
exposing some instability that was there anyways before. I haven't
seen any badness related to usage of secondary htab entries so far.

This should speed up guest memory allocations by quite a bit, because
we now have more space to put PTEs in.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-02-19 11:00:46 +01:00 коммит произвёл Avi Kivity
Родитель c10207fe86
Коммит 20a340abd3
1 изменённых файлов: 1 добавлений и 8 удалений

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@ -257,16 +257,9 @@ map_again:
if (ret < 0) {
/* If we couldn't map a primary PTE, try a secondary */
#ifdef USE_SECONDARY
hash = ~hash;
vflags ^= HPTE_V_SECONDARY;
attempt++;
if (attempt % 2)
vflags = HPTE_V_SECONDARY;
else
vflags = 0;
#else
attempt = 2;
#endif
goto map_again;
} else {
int hpte_id = kvmppc_mmu_hpte_cache_next(vcpu);