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authorStefan Roesch <shr@devkernel.io>2022-11-18 16:52:05 -0800
committerAndrew Morton <akpm@linux-foundation.org>2022-11-30 15:59:05 -0800
commit712c00d66a342a3ed375df41c3df7d3d2abad2c0 (patch)
tree493b209f1e7a446e28adcf656f3126ee307551ff /mm
parentc354d9268d7825eb8643f658c5091079d4f11a4a (diff)
downloadlinux-712c00d66a342a3ed375df41c3df7d3d2abad2c0.tar.bz2
mm: add bdi_get_min_bytes() function
This adds a function to return the specified value for min_bytes. It converts the stored min_ratio of the bdi to the corresponding bytes value. This is an approximation as it is based on the value that is returned by global_dirty_limits(), which can change. The returned value can be different than the value when the min_bytes value was set. Link: https://lkml.kernel.org/r/20221119005215.3052436-11-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>
Diffstat (limited to 'mm')
-rw-r--r--mm/page-writeback.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 20ae9adeb22f..c47824464f4c 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -740,6 +740,11 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio)
}
EXPORT_SYMBOL(bdi_set_max_ratio);
+u64 bdi_get_min_bytes(struct backing_dev_info *bdi)
+{
+ return bdi_get_bytes(bdi->min_ratio);
+}
+
u64 bdi_get_max_bytes(struct backing_dev_info *bdi)
{
return bdi_get_bytes(bdi->max_ratio);