diff options
| author |   Huang Ying <ying.huang@intel.com> | 2017-09-06 16:22:27 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-06 17:27:27 -0700 |
| commit | 98cc093cba1e925eb34963dedb5f1684f1bdb2f4 (patch) | |
| tree | 1651b9aed181959b1f5bae885a81ca130de09162 /drivers/nvdimm/btt.c | |
| parent | mm, THP, swap: don't allocate huge cluster for file backed swap device (diff) | |
| download | linux-dev-98cc093cba1e925eb34963dedb5f1684f1bdb2f4.tar.xz linux-dev-98cc093cba1e925eb34963dedb5f1684f1bdb2f4.zip | |
block, THP: make block_device_operations.rw_page support THP
The .rw_page in struct block_device_operations is used by the swap
subsystem to read/write the page contents from/into the corresponding
swap slot in the swap device. To support the THP (Transparent Huge
Page) swap optimization, the .rw_page is enhanced to support to
read/write THP if possible.
Link: http://lkml.kernel.org/r/20170724051840.2309-6-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Ross Zwisler <ross.zwisler@intel.com> [for brd.c, zram_drv.c, pmem.c]
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vishal L Verma <vishal.l.verma@intel.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shli@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/nvdimm/btt.c')
| -rw-r--r-- | drivers/nvdimm/btt.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index 14323faf8bd9..60491641a8d6 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -1241,8 +1241,10 @@ static int btt_rw_page(struct block_device *bdev, sector_t sector, { struct btt *btt = bdev->bd_disk->private_data; int rc; + unsigned int len; - rc = btt_do_bvec(btt, NULL, page, PAGE_SIZE, 0, is_write, sector); + len = hpage_nr_pages(page) * PAGE_SIZE; + rc = btt_do_bvec(btt, NULL, page, len, 0, is_write, sector); if (rc == 0) page_endio(page, is_write, 0); |