Messages in this thread | | | Date | Mon, 7 Jul 2014 17:31:43 +0200 | From | Gerald Schaefer <> | Subject | Re: [PATCH v10 5/7] s390: add pmd_[dirty|mkclean] for THP |
| |
On Mon, 7 Jul 2014 09:53:56 +0900 Minchan Kim <minchan@kernel.org> wrote:
> MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent > overwrite of the contents since MADV_FREE syscall is called for > THP page but for s390 pmds only referenced bit is available > because there is no free bit left in the pmd entry for the > software dirty bit so this patch adds dumb pmd_dirty which > returns always true by suggesting by Martin. > > They finally find a solution in future. > http://marc.info/?l=linux-api&m=140440328820808&w=2 > > Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> > Cc: Heiko Carstens <heiko.carstens@de.ibm.com> > Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> > Cc: Dominik Dingel <dingel@linux.vnet.ibm.com> > Cc: Christian Borntraeger <borntraeger@de.ibm.com> > Cc: linux-s390@vger.kernel.org > Signed-off-by: Minchan Kim <minchan@kernel.org> > --- > arch/s390/include/asm/pgtable.h | 12 ++++++++++++ > 1 file changed, 12 insertions(+)
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
| |