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![]() MIPS page fault path(except huge page) takes 3 exceptions (1 TLB Miss + 2 TLB Invalid), butthe second TLB Invalid exception is just triggered by __update_tlb from do_page_fault writing tlb without _PAGE_VALID set. With this patch, user space mapping prot is made young by default (with both _PAGE_VALID and _PAGE_YOUNG set), and it only take 1 TLB Miss + 1 TLB Invalid exception Remove pte_sw_mkyoung without polluting MM code and make page fault delay of MIPS on par with other architecture Link: https://lkml.kernel.org/r/20210204013942.8398-1-huangpei@loongson.cn Signed-off-by: Huang Pei <huangpei@loongson.cn> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: <huangpei@loongson.cn> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: <ambrosehua@gmail.com> Cc: Bibo Mao <maobibo@loongson.cn> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: Paul Burton <paulburton@kernel.org> Cc: Li Xuefeng <lixuefeng@loongson.cn> Cc: Yang Tiezhu <yangtiezhu@loongson.cn> Cc: Gao Juxin <gaojuxin@loongson.cn> Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Huacai Chen <chenhc@lemote.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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.. | ||
c-octeon.c | ||
c-r3k.c | ||
c-r4k.c | ||
c-tx39.c | ||
cache.c | ||
cerr-sb1.c | ||
cex-gen.S | ||
cex-oct.S | ||
cex-sb1.S | ||
context.c | ||
dma-noncoherent.c | ||
extable.c | ||
fault.c | ||
highmem.c | ||
hugetlbpage.c | ||
init.c | ||
ioremap.c | ||
ioremap64.c | ||
Makefile | ||
mmap.c | ||
page-funcs.S | ||
page.c | ||
pgtable-32.c | ||
pgtable-64.c | ||
pgtable.c | ||
sc-debugfs.c | ||
sc-ip22.c | ||
sc-mips.c | ||
sc-r5k.c | ||
sc-rm7k.c | ||
tlb-funcs.S | ||
tlb-r3k.c | ||
tlb-r4k.c | ||
tlbex-fault.S | ||
tlbex.c | ||
uasm-micromips.c | ||
uasm-mips.c | ||
uasm.c |