diff options
| -rw-r--r-- | mm/damon/core.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index bae41990f422..5ad31d2feae4 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -169,6 +169,30 @@ static bool damon_intersect(struct damon_region *r, } /* + * Fill holes in regions with new regions. + */ +static int damon_fill_regions_holes(struct damon_region *first, + struct damon_region *last, struct damon_target *t) +{ + struct damon_region *r = first; + + damon_for_each_region_from(r, t) { + struct damon_region *next, *newr; + + if (r == last) + break; + next = damon_next_region(r); + if (r->ar.end != next->ar.start) { + newr = damon_new_region(r->ar.end, next->ar.start); + if (!newr) + return -ENOMEM; + damon_insert_region(newr, r, next, t); + } + } + return 0; +} + +/* * damon_set_regions() - Set regions of a target for given address ranges. * @t: the given target. * @ranges: array of new monitoring target ranges. @@ -184,6 +208,7 @@ int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges, { struct damon_region *r, *next; unsigned int i; + int err; /* Remove regions which are not in the new ranges */ damon_for_each_region_safe(r, next, t) { @@ -226,6 +251,11 @@ int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges, first->ar.start = ALIGN_DOWN(range->start, DAMON_MIN_REGION); last->ar.end = ALIGN(range->end, DAMON_MIN_REGION); + + /* fill possible holes in the range */ + err = damon_fill_regions_holes(first, last, t); + if (err) + return err; } } return 0; |