This introduces the bdi_set_min_bytes() function. The min_bytes function
does not store the min_bytes value. Instead it converts the min_bytes
value into the corresponding ratio value.
Link: https://lkml.kernel.org/r/20221119005215.3052436-13-shr@devkernel.io
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Cc: Chris Mason <clm@meta.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
u64 bdi_get_max_bytes(struct backing_dev_info *bdi);
int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio);
int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
+int bdi_set_min_bytes(struct backing_dev_info *bdi, u64 min_bytes);
int bdi_set_max_bytes(struct backing_dev_info *bdi, u64 max_bytes);
int bdi_set_strict_limit(struct backing_dev_info *bdi, unsigned int strict_limit);
return bdi_get_bytes(bdi->min_ratio);
}
+int bdi_set_min_bytes(struct backing_dev_info *bdi, u64 min_bytes)
+{
+ int ret;
+ unsigned long pages = min_bytes >> PAGE_SHIFT;
+ unsigned long min_ratio;
+
+ ret = bdi_check_pages_limit(pages);
+ if (ret)
+ return ret;
+
+ min_ratio = bdi_ratio_from_pages(pages);
+ return __bdi_set_min_ratio(bdi, min_ratio);
+}
+
u64 bdi_get_max_bytes(struct backing_dev_info *bdi)
{
return bdi_get_bytes(bdi->max_ratio);