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Commit a055f66a authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent e5098611

arch/s390/include/asm/pgtable.h

+3 −4
Original line number Diff line number Diff line
@@ -1144,9 +1144,8 @@ 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);

	}
@@ -1155,7 +1154,7 @@ 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);

	}