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| author |   Gavin Shan <gshan@redhat.com> | 2021-03-16 12:11:26 +0800 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2021-04-07 14:33:22 +0100 |
| commit | 10ba2d17d2972926c60e01dace6d7a3f8d968c4f (patch) | |
| tree | 588816d146a0b6a701f31135c29b78eb28c3bde4 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | KVM: arm64: Use find_vma_intersection() (diff) | |
| download | linux-dev-10ba2d17d2972926c60e01dace6d7a3f8d968c4f.tar.xz linux-dev-10ba2d17d2972926c60e01dace6d7a3f8d968c4f.zip | |
KVM: arm64: Don't retrieve memory slot again in page fault handler
We needn't retrieve the memory slot again in user_mem_abort() because
the corresponding memory slot has been passed from the caller. This
would save some CPU cycles. For example, the time used to write 1GB
memory, which is backed by 2MB hugetlb pages and write-protected, is
dropped by 6.8% from 928ms to 864ms.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210316041126.81860-4-gshan@redhat.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions