From a3096943642828b16e58e02b435710c565061d53 Mon Sep 17 00:00:00 2001 From: SeongJae Park Date: Tue, 18 Jun 2024 11:18:08 -0700 Subject: [PATCH] mm/damon/lru_sort: use damon_commit_ctx() DAMON_LRU_SORT manually manipulates the DAMON context struct for online parameters update. Since the struct contains not only input parameters but also internal status and operation results, it is not that simple. Indeed, we found and fixed a few bugs in the code. Now DAMON core layer provides a function for the usage, namely damon_commit_ctx(). Replace the manual manipulation logic with the function. The core layer function could have its own bugs, but this change removes a source of bugs. Link: https://lkml.kernel.org/r/20240618181809.82078-12-sj@kernel.org Signed-off-by: SeongJae Park Signed-off-by: Andrew Morton --- mm/damon/lru_sort.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c index 3775f0f2743d5..f83542973946e 100644 --- a/mm/damon/lru_sort.c +++ b/mm/damon/lru_sort.c @@ -199,15 +199,22 @@ static void damon_lru_sort_copy_quota_status(struct damos_quota *dst, static int damon_lru_sort_apply_parameters(void) { + struct damon_ctx *param_ctx; + struct damon_target *param_target; struct damos *scheme, *hot_scheme, *cold_scheme; struct damos *old_hot_scheme = NULL, *old_cold_scheme = NULL; unsigned int hot_thres, cold_thres; - int err = 0; + int err; - err = damon_set_attrs(ctx, &damon_lru_sort_mon_attrs); + err = damon_modules_new_paddr_ctx_target(¶m_ctx, ¶m_target); if (err) return err; + err = damon_set_attrs(ctx, &damon_lru_sort_mon_attrs); + if (err) + goto out; + + err = -ENOMEM; damon_for_each_scheme(scheme, ctx) { if (!old_hot_scheme) { old_hot_scheme = scheme; @@ -220,7 +227,7 @@ static int damon_lru_sort_apply_parameters(void) hot_thres_access_freq / 1000; hot_scheme = damon_lru_sort_new_hot_scheme(hot_thres); if (!hot_scheme) - return -ENOMEM; + goto out; if (old_hot_scheme) damon_lru_sort_copy_quota_status(&hot_scheme->quota, &old_hot_scheme->quota); @@ -229,18 +236,24 @@ static int damon_lru_sort_apply_parameters(void) cold_scheme = damon_lru_sort_new_cold_scheme(cold_thres); if (!cold_scheme) { damon_destroy_scheme(hot_scheme); - return -ENOMEM; + goto out; } if (old_cold_scheme) damon_lru_sort_copy_quota_status(&cold_scheme->quota, &old_cold_scheme->quota); - damon_set_schemes(ctx, &hot_scheme, 1); - damon_add_scheme(ctx, cold_scheme); + damon_set_schemes(param_ctx, &hot_scheme, 1); + damon_add_scheme(param_ctx, cold_scheme); - return damon_set_region_biggest_system_ram_default(target, + err = damon_set_region_biggest_system_ram_default(param_target, &monitor_region_start, &monitor_region_end); + if (err) + goto out; + err = damon_commit_ctx(ctx, param_ctx); +out: + damon_destroy_ctx(param_ctx); + return err; } static int damon_lru_sort_turn(bool on) -- 2.47.2