diff options
| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-10-08 09:18:26 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-23 11:14:24 +0100 |
| commit | 18da236908793abccebc6f365fbe6e95a5b41db0 (patch) | |
| tree | 34899d0c737b625660a44f2b47436e5e82a17511 /arch/s390/mm/dump_pagetables.c | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input (diff) | |
| download | wireguard-linux-18da236908793abccebc6f365fbe6e95a5b41db0.tar.xz wireguard-linux-18da236908793abccebc6f365fbe6e95a5b41db0.zip | |
s390/mm,vmem: use 2GB frames for identity mapping
Use 2GB frames for indentity mapping if EDAT2 is
available to reduce TLB pressure.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/dump_pagetables.c')
| -rw-r--r-- | arch/s390/mm/dump_pagetables.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c index cbc6668acb85..04e4892247d2 100644 --- a/arch/s390/mm/dump_pagetables.c +++ b/arch/s390/mm/dump_pagetables.c @@ -150,6 +150,7 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st, static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t *pgd, unsigned long addr) { + unsigned int prot; pud_t *pud; int i; @@ -157,7 +158,11 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, st->current_address = addr; pud = pud_offset(pgd, addr); if (!pud_none(*pud)) - walk_pmd_level(m, st, pud, addr); + if (pud_large(*pud)) { + prot = pud_val(*pud) & _PAGE_RO; + note_page(m, st, prot, 2); + } else + walk_pmd_level(m, st, pud, addr); else note_page(m, st, _PAGE_INVALID, 2); addr += PUD_SIZE; |