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author | Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> | 2013-01-08 19:43:28 +0900 |
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committer | Gleb Natapov <gleb@redhat.com> | 2013-01-14 11:13:15 +0200 |
commit | c972f3b125d8818748429b94cd2e59f473943a33 (patch) | |
tree | da8ecba2b20a5804fa193471a980e301f6b8b265 /fs/ioprio.c | |
parent | aa11e3a8a6d9f92c3fe4b91a9aca5d8c23d55d4d (diff) | |
download | op-kernel-dev-c972f3b125d8818748429b94cd2e59f473943a33.zip op-kernel-dev-c972f3b125d8818748429b94cd2e59f473943a33.tar.gz |
KVM: Write protect the updated slot only when dirty logging is enabled
Calling kvm_mmu_slot_remove_write_access() for a deleted slot does
nothing but search for non-existent mmu pages which have mappings to
that deleted memory; this is safe but a waste of time.
Since we want to make the function rmap based in a later patch, in a
manner which makes it unsafe to be called for a deleted slot, we makes
the caller see if the slot is non-zero and being dirty logged.
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'fs/ioprio.c')
0 files changed, 0 insertions, 0 deletions