mirror of
https://github.com/versity/scoutfs.git
synced 2026-02-10 04:30:10 +00:00
cca4fcb788
Move to the more recent interfaces for counting and scanning cached objects to shrink. Signed-off-by: Zach Brown <zab@versity.com> Signed-off-by: Auke Kok <auke.kok@versity.com>
32 lines
648 B
C
32 lines
648 B
C
#ifndef _SCOUTFS_UTIL_H_
|
|
#define _SCOUTFS_UTIL_H_
|
|
|
|
/*
|
|
* Little utility helpers that probably belong upstream.
|
|
*/
|
|
|
|
static inline void down_write_two(struct rw_semaphore *a,
|
|
struct rw_semaphore *b)
|
|
{
|
|
BUG_ON(a == b);
|
|
|
|
if (a > b)
|
|
swap(a, b);
|
|
|
|
down_write(a);
|
|
down_write_nested(b, SINGLE_DEPTH_NESTING);
|
|
}
|
|
|
|
/*
|
|
* When returning shrinker counts from scan_objects, we should steer
|
|
* clear of the magic SHRINK_STOP and SHRINK_EMPTY values, which are near
|
|
* ~0UL values. Hence, we cap count to ~0L, which is arbitarily high
|
|
* enough to avoid it.
|
|
*/
|
|
static inline long shrinker_min_long(long count)
|
|
{
|
|
return min(count, LONG_MAX);
|
|
}
|
|
|
|
#endif
|