From: Xin Hao <xhao@xxxxxxxxxxxxxxxxx> In lru_sort.c and reclaim.c, they are all defining get_monitoring_region() function, there is no need to define it separately. As 'get_monitoring_region()' is not a 'static' function anymore, we try to use a prefix to distinguish with other functions, so there rename it to 'damon_find_biggest_system_ram'. Suggested-by: SeongJae Park <sj@xxxxxxxxxx> Signed-off-by: Xin Hao <xhao@xxxxxxxxxxxxxxxxx> Reviewed-by: SeongJae Park <sj@xxxxxxxxxx> Signed-off-by: SeongJae Park <sj@xxxxxxxxxx> --- Changes from v4 (https://lore.kernel.org/damon/20220909024105.84831-1-xhao@xxxxxxxxxxxxxxxxx/) - Fix trivial cosmetic nits (SeongJae Park) - Move definition of the new struct to core.c (SeongJae Park) include/linux/damon.h | 2 ++ mm/damon/core.c | 40 ++++++++++++++++++++++++++++++++++++++++ mm/damon/lru_sort.c | 37 ++----------------------------------- mm/damon/reclaim.c | 37 ++----------------------------------- 4 files changed, 46 insertions(+), 70 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index 90f20675da22..016b6c9c03d6 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -549,6 +549,8 @@ 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); + #endif /* CONFIG_DAMON */ #endif /* _DAMON_H */ diff --git a/mm/damon/core.c b/mm/damon/core.c index 6f6c9c9aca9d..325365939308 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1239,4 +1239,44 @@ static int kdamond_fn(void *data) return 0; } +/* + * struct damon_system_ram_region - System RAM resource address region of + * [@start, @end). + * @start: Start address of the region (inclusive). + * @end: End address of the region (exclusive). + */ +struct damon_system_ram_region { + unsigned long start; + unsigned long end; +}; + +static int walk_system_ram(struct resource *res, void *arg) +{ + struct damon_system_ram_region *a = arg; + + if (a->end - a->start < resource_size(res)) { + a->start = res->start; + a->end = res->end; + } + return 0; +} + +/* + * 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) + +{ + struct damon_system_ram_region arg = {}; + + walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram); + if (arg.end <= arg.start) + return false; + + *start = arg.start; + *end = arg.end; + return true; +} + #include "core-test.h" diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c index 0184ed4828b7..8415e18fcf0e 100644 --- a/mm/damon/lru_sort.c +++ b/mm/damon/lru_sort.c @@ -257,39 +257,6 @@ module_param(nr_cold_quota_exceeds, ulong, 0400); static struct damon_ctx *ctx; static struct damon_target *target; -struct damon_lru_sort_ram_walk_arg { - unsigned long start; - unsigned long end; -}; - -static int walk_system_ram(struct resource *res, void *arg) -{ - struct damon_lru_sort_ram_walk_arg *a = arg; - - if (a->end - a->start < resource_size(res)) { - a->start = res->start; - a->end = res->end; - } - return 0; -} - -/* - * 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. - */ -static bool get_monitoring_region(unsigned long *start, unsigned long *end) -{ - struct damon_lru_sort_ram_walk_arg arg = {}; - - walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram); - if (arg.end <= arg.start) - return false; - - *start = arg.start; - *end = arg.end; - return true; -} - /* Create a DAMON-based operation scheme for hot memory regions */ static struct damos *damon_lru_sort_new_hot_scheme(unsigned int hot_thres) { @@ -414,8 +381,8 @@ static int damon_lru_sort_apply_parameters(void) if (monitor_region_start > monitor_region_end) return -EINVAL; if (!monitor_region_start && !monitor_region_end && - !get_monitoring_region(&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; diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c index 5aeca0b9e88e..fe7bc0c55ecb 100644 --- a/mm/damon/reclaim.c +++ b/mm/damon/reclaim.c @@ -229,39 +229,6 @@ module_param(nr_quota_exceeds, ulong, 0400); static struct damon_ctx *ctx; static struct damon_target *target; -struct damon_reclaim_ram_walk_arg { - unsigned long start; - unsigned long end; -}; - -static int walk_system_ram(struct resource *res, void *arg) -{ - struct damon_reclaim_ram_walk_arg *a = arg; - - if (a->end - a->start < resource_size(res)) { - a->start = res->start; - a->end = res->end; - } - return 0; -} - -/* - * 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. - */ -static bool get_monitoring_region(unsigned long *start, unsigned long *end) -{ - struct damon_reclaim_ram_walk_arg arg = {}; - - walk_system_ram_res(0, ULONG_MAX, &arg, walk_system_ram); - if (arg.end <= arg.start) - return false; - - *start = arg.start; - *end = arg.end; - return true; -} - static struct damos *damon_reclaim_new_scheme(void) { struct damos_access_pattern pattern = { @@ -328,8 +295,8 @@ static int damon_reclaim_apply_parameters(void) if (monitor_region_start > monitor_region_end) return -EINVAL; if (!monitor_region_start && !monitor_region_end && - !get_monitoring_region(&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; -- 2.25.1
