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Commit 20a340ab authored by Alexander Graf's avatar Alexander Graf Committed by Avi Kivity
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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: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent c10207fe

arch/powerpc/kvm/book3s_64_mmu_host.c

+1 −8
Original line number Diff line number Diff line
@@ -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);