From 50dc127bad785a2bbae5c29aef570f9eece711a2 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 19 Jul 2013 10:31:55 +0200 Subject: [PATCH] s390/pgtable: skip pgste updates on full flush On process exit there is no more need for the pgste information. Skip the expensive storage key operations which should speed up termination of KVM processes. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pgtable.h | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index e75fa7e9b82d..c2ec83566679 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1148,10 +1148,9 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, pgste_t pgste; pte_t pte; - if (mm_has_pgste(mm)) { + if (!full && mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); - if (!full) - pgste = pgste_ipte_notify(mm, address, ptep, pgste); + pgste = pgste_ipte_notify(mm, address, ptep, pgste); } pte = *ptep; @@ -1159,7 +1158,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, __ptep_ipte(address, ptep); pte_val(*ptep) = _PAGE_INVALID; - if (mm_has_pgste(mm)) { + if (!full && mm_has_pgste(mm)) { pgste = pgste_update_all(&pte, pgste); pgste_set_unlock(ptep, pgste); } -- 2.39.5