linux-kernel - [PATCH 0/5] KVM: x86: MMU: Eliminate extra memory slot searches in page fault handlers

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Message-Id: <20151015193953.7a277f640c7dfd19e8b8dcee@lab.ntt.co.jp>
Date:	Thu, 15 Oct 2015 19:39:53 +0900
From:	Takuya Yoshikawa <yoshikawa_takuya_b1@....ntt.co.jp>
To:	pbonzini@...hat.com
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/5] KVM: x86: MMU: Eliminate extra memory slot searches in
 page fault handlers

In page fault handlers, both mapping_level_dirty_bitmap() and mapping_level()
do a memory slot search, binary search, through kvm_vcpu_gfn_to_memslot(), which
may not be negligible especially for virtual machines with many memory slots.

With a bit of cleanup effort, the patch set reduces this overhead.

  [PATCH 1/5] KVM: x86: MMU: Make force_pt_level bool
  [PATCH 2/5] KVM: x86: MMU: Simplify force_pt_level calculation code in FNAME(page_fault)()
  [PATCH 3/5] KVM: x86: MMU: Merge mapping_level_dirty_bitmap() into mapping_level()
  [PATCH 4/5] KVM: x86: MMU: Remove mapping_level_dirty_bitmap()
  [PATCH 5/5] KVM: x86: MMU: Eliminate an extra memory slot search in mapping_level()

	Takuya
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