Re: [PATCH v6 1/4] MIPS: Do not flush tlb page when updating PTE entry

From: Sergei Shtylyov
Date: Mon May 25 2020 - 04:12:37 EST


On 25.05.2020 5:52, Bibo Mao wrote:

It is not necessary to flush tlb page on all CPUs if suitable PTE
entry exists already during page fault handling, just updating
TLB is fine.

Here redefine flush_tlb_fix_spurious_fault as empty on MIPS system.

Need empty line here.

- Add update_mmu_tlb function as empty on all platform except mips
system, we use this function to update local tlb for page fault
smp-race handling
- define update_mmu_cache function specified on MIPS platform, and
add page fault smp-race stats info
- add pte_sw_mkyoung function to implement readable privilege, and
this function is only in effect on MIPS system.
- add page valid bit judgement in function pte_modify
- add detailed changelog, modify typo issue in patch V2
- split flush_tlb_fix_spurious_fault and tlb update into two patches
- comments typo modification
- separate tlb update and add pte readable privilege into two patches

It was a bad idea to keep the version change log in the 1st patch only,
we have either cover letter for that, or all the individual patches...

Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx>

MBR, Sergei