diff options
| author | Jan Kara <jack@suse.cz> | 2022-06-23 10:51:46 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-24 18:39:31 -0600 |
| commit | fe6c9c6e3e3e332b998393d214fba9d09ab0acb0 (patch) | |
| tree | 5c15f495e21679cf5c2c41de0bdec69219f074ec /include/linux/writeback.h | |
| parent | e92eebbb09218e128e559cf12b65317721309324 (diff) | |
mm: Add balance_dirty_pages_ratelimited_flags() function
This adds the helper function balance_dirty_pages_ratelimited_flags().
It adds the parameter flags to balance_dirty_pages_ratelimited().
The flags parameter is passed to balance_dirty_pages(). For async
buffered writes the flag value will be BDP_ASYNC.
If balance_dirty_pages() gets called for async buffered write, we don't
want to wait. Instead we need to indicate to the caller that throttling
is needed so that it can stop writing and offload the rest of the write
to a context that can block.
The new helper function is also used by balance_dirty_pages_ratelimited().
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Stefan Roesch <shr@fb.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220623175157.1715274-4-shr@fb.com
[axboe: fix kerneltest bot 'ret' issue]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index da21d63f70e2..b8c9610c2313 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -364,7 +364,14 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty); unsigned long wb_calc_thresh(struct bdi_writeback *wb, unsigned long thresh); void wb_update_bandwidth(struct bdi_writeback *wb); + +/* Invoke balance dirty pages in async mode. */ +#define BDP_ASYNC 0x0001 + void balance_dirty_pages_ratelimited(struct address_space *mapping); +int balance_dirty_pages_ratelimited_flags(struct address_space *mapping, + unsigned int flags); + bool wb_over_bg_thresh(struct bdi_writeback *wb); typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc, |