On Tue, May 10, 2022 at 07:44:41PM +0800, Mao Bibo wrote: > When process exits or execute new binary, it will call function > exit_mmap with old mm, there is such function call trace: > exit_mmap(struct mm_struct *mm) > --> tlb_finish_mmu(&tlb, 0, -1) > --> arch_tlb_finish_mmu(tlb, start, end, force) > --> tlb_flush_mmu(tlb); > --> tlb_flush(struct mmu_gather *tlb) > --> flush_tlb_mm(tlb->mm) > > It is not necessary to flush tlb since oldmm is not used anymore > by the process, there is similar operations on IA64/ARM64 etc, > this patch adds such optimization on MIPS. > > Signed-off-by: Mao Bibo <maobibo@xxxxxxxxxxx> > --- > arch/mips/kernel/smp.c | 6 ++++++ > 1 file changed, 6 insertions(+) applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]
