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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2013-07-19 10:31:55 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-08-22 12:20:06 +0200
commita055f66a3a099e2c886a53421405f98683e94b2b (patch)
tree39eb742a6ae54fce3c14a6a9dc73db476d54bf81 /arch/s390
parente509861105a3c1425f3f929bd631f88340b499bf (diff)
downloadlinux-a055f66a3a099e2c886a53421405f98683e94b2b.tar.bz2
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 <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/pgtable.h7
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index b09c00b5cfa2..b59b44badae9 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1144,10 +1144,9 @@ 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;
@@ -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);
}