Messages in this thread | | | Subject | Re: [PATCH -next 0/2] riscv/mm: Enable THP migration | From | Nanyong Sun <> | Date | Thu, 30 Dec 2021 14:45:57 +0800 |
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Hi Palmer,
This patchset has been sent for one month ago, I was wondering if you could
have a review and give a feedback please, thanks.
On 2021/11/23 22:06, Nanyong Sun wrote: > This series enables THP migration on riscv via ARCH_ENABLE_THP_MIGRATION. > But first this adjusts PAGE_PROT_NONE to satisfy generic memory semantics > like the behavior of pmd_present() and pmd_trans_huge() when in > THP splitting or migration. > > This feature can reduce the time of THP migration by not splits THP > before migration and can guarantee the pages after migration are still > contiguous.[1] > > I have tested the below test case on qemu based on riscv after > enabling this feature, the throughput of THP migration gains 13x > performance improvement: > https://github.com/x-y-z/thp-migration-bench > > I also have tested and passed the test cases under > tools/testing/selftests/vm. > > [1]: https://lwn.net/Articles/723764/ > > Nanyong Sun (2): > riscv/mm: Adjust PAGE_PROT_NONE to comply with THP semantics > riscv/mm: Enable THP migration > > arch/riscv/Kconfig | 1 + > arch/riscv/include/asm/pgtable-bits.h | 2 +- > arch/riscv/include/asm/pgtable.h | 16 +++++++++++----- > 3 files changed, 13 insertions(+), 6 deletions(-) >
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