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| author | Jisheng Zhang <jszhang@kernel.org> | 2021-04-16 19:37:22 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-05-26 08:50:47 +0300 |
| commit | 3332f4190674114e08daaf6859c11a7e464bceff (patch) | |
| tree | 1cc6c4dac63d80494f602016964b91833353b992 /arch/riscv/Kconfig | |
| parent | e88b333142e4aba7410d6d3292ad97b3a8588bfe (diff) | |
| download | linux-3332f4190674114e08daaf6859c11a7e464bceff.tar.xz | |
riscv: mremap speedup - enable HAVE_MOVE_PUD and HAVE_MOVE_PMD
HAVE_MOVE_PUD enables remapping pages at the PUD level if both the source
and destination addresses are PUD-aligned.
HAVE_MOVE_PMD does similar speedup on the PMD level.
With HAVE_MOVE_PUD enabled, there is about a 143x improvement on qemu
With HAVE_MOVE_PMD enabled, there is about a 5x improvement on qemu
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index a160f60f9378..b58596b141fc 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -82,6 +82,8 @@ config RISCV select HAVE_KPROBES select HAVE_KPROBES_ON_FTRACE select HAVE_KRETPROBES + select HAVE_MOVE_PMD + select HAVE_MOVE_PUD select HAVE_PCI select HAVE_PERF_EVENTS select HAVE_PERF_REGS |