diff options
| -rw-r--r-- | mm/damon/vaddr.c | 66 |
1 files changed, 42 insertions, 24 deletions
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index 5ba82ab4943b..26e9ad80f9ea 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -297,59 +297,77 @@ static bool damon_intersect(struct damon_region *r, } /* - * Update damon regions for the three big regions of the given target + * damon_set_regions() - Set regions of a target for given address ranges. + * @t: the given target. + * @ranges: array of new monitoring target ranges. + * @nr_ranges: length of @ranges. * - * t the given target - * bregions the three big regions of the target + * This function adds new regions to, or modify existing regions of a + * monitoring target to fit in specific ranges. + * + * Return: 0 if success, or negative error code otherwise. */ -static void damon_va_apply_three_regions(struct damon_target *t, - struct damon_addr_range bregions[3]) +static int damon_set_regions(struct damon_target *t, + struct damon_addr_range *ranges, unsigned int nr_ranges) { struct damon_region *r, *next; unsigned int i; - /* Remove regions which are not in the three big regions now */ + /* Remove regions which are not in the new ranges */ damon_for_each_region_safe(r, next, t) { - for (i = 0; i < 3; i++) { - if (damon_intersect(r, &bregions[i])) + for (i = 0; i < nr_ranges; i++) { + if (damon_intersect(r, &ranges[i])) break; } - if (i == 3) + if (i == nr_ranges) damon_destroy_region(r, t); } - /* Adjust intersecting regions to fit with the three big regions */ - for (i = 0; i < 3; i++) { - struct damon_region *first = NULL, *last; - struct damon_region *newr; - struct damon_addr_range *br; + /* Add new regions or resize existing regions to fit in the ranges */ + for (i = 0; i < nr_ranges; i++) { + struct damon_region *first = NULL, *last, *newr; + struct damon_addr_range *range; - br = &bregions[i]; - /* Get the first and last regions which intersects with br */ + range = &ranges[i]; + /* Get the first/last regions intersecting with the range */ damon_for_each_region(r, t) { - if (damon_intersect(r, br)) { + if (damon_intersect(r, range)) { if (!first) first = r; last = r; } - if (r->ar.start >= br->end) + if (r->ar.start >= range->end) break; } if (!first) { - /* no damon_region intersects with this big region */ + /* no region intersects with this range */ newr = damon_new_region( - ALIGN_DOWN(br->start, + ALIGN_DOWN(range->start, DAMON_MIN_REGION), - ALIGN(br->end, DAMON_MIN_REGION)); + ALIGN(range->end, DAMON_MIN_REGION)); if (!newr) - continue; + return -ENOMEM; damon_insert_region(newr, damon_prev_region(r), r, t); } else { - first->ar.start = ALIGN_DOWN(br->start, + /* resize intersecting regions to fit in this range */ + first->ar.start = ALIGN_DOWN(range->start, DAMON_MIN_REGION); - last->ar.end = ALIGN(br->end, DAMON_MIN_REGION); + last->ar.end = ALIGN(range->end, DAMON_MIN_REGION); } } + return 0; +} + +/* + * Update damon regions for the three big regions of the given target + * + * t the given target + * bregions the three big regions of the target + */ +static void damon_va_apply_three_regions(struct damon_target *t, + struct damon_addr_range bregions[3]) +{ + damon_set_regions(t, bregions, 3); } /* |