s390/mm: implement dirty bits for large segment table entries

Browse source

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>

...

This commit is contained in:

Martin Schwidefsky 2014-07-24 11:03:41 +02:00

parent 55e4283c3e

commit 152125b7a8

3 changed files with 159 additions and 144 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

197

arch/s390/include/asm/pgtable.h

View file

103

arch/s390/mm/hugetlbpage.c

View file

3

arch/s390/mm/pgtable.c

View file