From 233f0b31bd9503ce2be7be0bde69c67287c8a741 Mon Sep 17 00:00:00 2001 From: Kaixu Xia Date: Tue, 20 Sep 2022 16:53:22 +0000 Subject: [PATCH] mm/damon: deduplicate damon_{reclaim,lru_sort}_apply_parameters() The bodies of damon_{reclaim,lru_sort}_apply_parameters() contain duplicates. This commit adds a common function damon_set_region_biggest_system_ram_default() to remove the duplicates. Link: https://lkml.kernel.org/r/6329f00d.a70a0220.9bb29.3678SMTPIN_ADDED_BROKEN@mx.google.com Signed-off-by: Kaixu Xia Suggested-by: SeongJae Park Reviewed-by: SeongJae Park Signed-off-by: SeongJae Park Signed-off-by: Andrew Morton --- include/linux/damon.h | 3 ++- mm/damon/core.c | 35 ++++++++++++++++++++++++++++++++++- mm/damon/lru_sort.c | 13 +++---------- mm/damon/reclaim.c | 13 +++---------- 4 files changed, 42 insertions(+), 22 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index e7808a84675f..ed5470f50bab 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -557,7 +557,8 @@ static inline bool damon_target_has_pid(const struct damon_ctx *ctx) int damon_start(struct damon_ctx **ctxs, int nr_ctxs, bool exclusive); int damon_stop(struct damon_ctx **ctxs, int nr_ctxs); -bool damon_find_biggest_system_ram(unsigned long *start, unsigned long *end); +int damon_set_region_biggest_system_ram_default(struct damon_target *t, + unsigned long *start, unsigned long *end); #endif /* CONFIG_DAMON */ diff --git a/mm/damon/core.c b/mm/damon/core.c index 9c80c6eb00c2..4de8c7c52979 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1245,7 +1245,8 @@ static int walk_system_ram(struct resource *res, void *arg) * Find biggest 'System RAM' resource and store its start and end address in * @start and @end, respectively. If no System RAM is found, returns false. */ -bool damon_find_biggest_system_ram(unsigned long *start, unsigned long *end) +static bool damon_find_biggest_system_ram(unsigned long *start, + unsigned long *end) { struct damon_system_ram_region arg = {}; @@ -1259,6 +1260,38 @@ bool damon_find_biggest_system_ram(unsigned long *start, unsigned long *end) return true; } +/** + * damon_set_region_biggest_system_ram_default() - Set the region of the given + * monitoring target as requested, or biggest 'System RAM'. + * @t: The monitoring target to set the region. + * @start: The pointer to the start address of the region. + * @end: The pointer to the end address of the region. + * + * This function sets the region of @t as requested by @start and @end. If the + * values of @start and @end are zero, however, this function finds the biggest + * 'System RAM' resource and sets the region to cover the resource. In the + * latter case, this function saves the start and end addresses of the resource + * in @start and @end, respectively. + * + * Return: 0 on success, negative error code otherwise. + */ +int damon_set_region_biggest_system_ram_default(struct damon_target *t, + unsigned long *start, unsigned long *end) +{ + struct damon_addr_range addr_range; + + if (*start > *end) + return -EINVAL; + + if (!*start && !*end && + !damon_find_biggest_system_ram(start, end)) + return -EINVAL; + + addr_range.start = *start; + addr_range.end = *end; + return damon_set_regions(t, &addr_range, 1); +} + static int __init damon_init(void) { damon_region_cache = KMEM_CACHE(damon_region, 0); diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c index d7eb72b41cb6..efbc2bda8b9c 100644 --- a/mm/damon/lru_sort.c +++ b/mm/damon/lru_sort.c @@ -188,7 +188,6 @@ static struct damos *damon_lru_sort_new_cold_scheme(unsigned int cold_thres) static int damon_lru_sort_apply_parameters(void) { struct damos *scheme; - struct damon_addr_range addr_range; unsigned int hot_thres, cold_thres; int err = 0; @@ -211,15 +210,9 @@ static int damon_lru_sort_apply_parameters(void) return -ENOMEM; damon_add_scheme(ctx, scheme); - if (monitor_region_start > monitor_region_end) - return -EINVAL; - if (!monitor_region_start && !monitor_region_end && - !damon_find_biggest_system_ram(&monitor_region_start, - &monitor_region_end)) - return -EINVAL; - addr_range.start = monitor_region_start; - addr_range.end = monitor_region_end; - return damon_set_regions(target, &addr_range, 1); + return damon_set_region_biggest_system_ram_default(target, + &monitor_region_start, + &monitor_region_end); } static int damon_lru_sort_turn(bool on) diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c index 3d59ab11b7b3..162c9b1ca00f 100644 --- a/mm/damon/reclaim.c +++ b/mm/damon/reclaim.c @@ -144,7 +144,6 @@ static struct damos *damon_reclaim_new_scheme(void) static int damon_reclaim_apply_parameters(void) { struct damos *scheme; - struct damon_addr_range addr_range; int err = 0; err = damon_set_attrs(ctx, &damon_reclaim_mon_attrs); @@ -157,15 +156,9 @@ static int damon_reclaim_apply_parameters(void) return -ENOMEM; damon_set_schemes(ctx, &scheme, 1); - if (monitor_region_start > monitor_region_end) - return -EINVAL; - if (!monitor_region_start && !monitor_region_end && - !damon_find_biggest_system_ram(&monitor_region_start, - &monitor_region_end)) - return -EINVAL; - addr_range.start = monitor_region_start; - addr_range.end = monitor_region_end; - return damon_set_regions(target, &addr_range, 1); + return damon_set_region_biggest_system_ram_default(target, + &monitor_region_start, + &monitor_region_end); } static int damon_reclaim_turn(bool on) -- 2.25.1