diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-01-25 14:34:35 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:33:33 -0800 |
| commit | 05cda97ecb7046f4192a921741aae33b300dd628 (patch) | |
| tree | d0f2a033dd730c276bbee8c8634bdeb5ccc529bf /mm/page_io.c | |
| parent | e3e2762bd3c5e02780618fc42f5b0049a3bedb30 (diff) | |
mm: factor out a swap_writepage_bdev helper
Split the block device case from swap_readpage into a separate helper,
following the abstraction for file based swap.
Link: https://lkml.kernel.org/r/20230125133436.447864-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Keith Busch <kbusch@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_io.c')
| -rw-r--r-- | mm/page_io.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/mm/page_io.c b/mm/page_io.c index 3ba5a6e99030..0a1a3b831344 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -326,23 +326,12 @@ static void swap_writepage_fs(struct page *page, struct writeback_control *wbc) *wbc->swap_plug = sio; } -void __swap_writepage(struct page *page, struct writeback_control *wbc) +static void swap_writepage_bdev(struct page *page, + struct writeback_control *wbc, struct swap_info_struct *sis) { struct bio *bio; - int ret; - struct swap_info_struct *sis = page_swap_info(page); - - VM_BUG_ON_PAGE(!PageSwapCache(page), page); - /* - * ->flags can be updated non-atomicially (scan_swap_map_slots), - * but that will never affect SWP_FS_OPS, so the data_race - * is safe. - */ - if (data_race(sis->flags & SWP_FS_OPS)) - return swap_writepage_fs(page, wbc); - ret = bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc); - if (!ret) { + if (!bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc)) { count_swpout_vm_event(page); return; } @@ -361,6 +350,22 @@ void __swap_writepage(struct page *page, struct writeback_control *wbc) submit_bio(bio); } +void __swap_writepage(struct page *page, struct writeback_control *wbc) +{ + struct swap_info_struct *sis = page_swap_info(page); + + VM_BUG_ON_PAGE(!PageSwapCache(page), page); + /* + * ->flags can be updated non-atomicially (scan_swap_map_slots), + * but that will never affect SWP_FS_OPS, so the data_race + * is safe. + */ + if (data_race(sis->flags & SWP_FS_OPS)) + swap_writepage_fs(page, wbc); + else + swap_writepage_bdev(page, wbc, sis); +} + void swap_write_unplug(struct swap_iocb *sio) { struct iov_iter from; |