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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-07-24 09:03:41 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-08-01 12:55:05 (GMT) |
| commit | 152125b7a882df36a55a8eadbea6d0edf1461ee7 (patch) | |
| tree | 247d93a58d6ff9ff9ccbe66840acaa240069d879 /arch/s390/mm/pgtable.c | |
| parent | 55e4283c3eb1d850893f645dd695c9c75d5fa1fc (diff) | |
| download | linux-152125b7a882df36a55a8eadbea6d0edf1461ee7.tar.xz | |
s390/mm: implement dirty bits for large segment table entries
The large segment table entry format has block of bits for the
ACC/F values for the large page. These bits are valid only if
another bit (AV bit 0x10000) of the segment table entry is set.
The ACC/F bits do not have a meaning if the AV bit is off.
This allows to put the THP splitting bit, the segment young bit
and the new segment dirty bit into the ACC/F bits as long as
the AV bit stays off. The dirty and young information is only
available if the pmd is large.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/pgtable.c')
| -rw-r--r-- | arch/s390/mm/pgtable.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index f90ad85..19daa53 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -1433,6 +1433,9 @@ int pmdp_set_access_flags(struct vm_area_struct *vma, { VM_BUG_ON(address & ~HPAGE_PMD_MASK); + entry = pmd_mkyoung(entry); + if (dirty) + entry = pmd_mkdirty(entry); if (pmd_same(*pmdp, entry)) return 0; pmdp_invalidate(vma, address, pmdp); |