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[0/2] Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP & fixup race condition on PG_dcache_clean

Message ID 20221023133205.3493564-1-guoren@kernel.org (mailing list archive)
Headers show
Series Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP & fixup race condition on PG_dcache_clean | expand

Message

Guo Ren Oct. 23, 2022, 1:32 p.m. UTC 
From: Guo Ren <guoren@linux.alibaba.com>

The first patch fixup race condition on PG_dcache_clean which found in
arm64. Then enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP and tested
with simple hugetlbfs test case.

# cat /proc/sys/vm/hugetlb_optimize_vmemmap
1
# echo 8 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
# mount -t hugetlbfs none test/ -o pagesize=2048k
# ./myhugemap_test
# umount test/
# echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

No problem found.

Guo Ren (2):
  riscv: Fixup race condition on PG_dcache_clean in flush_icache_pte
  riscv: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP

 arch/riscv/Kconfig                  | 1 +
 arch/riscv/include/asm/cacheflush.h | 3 +++
 arch/riscv/mm/cacheflush.c          | 7 ++++++-
 3 files changed, 10 insertions(+), 1 deletion(-)