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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-11 11:49:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-11 11:49:46 +0200 |
| commit | 70db9eace66c4932f17d42640fad17f561aa20da (patch) | |
| tree | e63d7b0c3b67dc24680df931766ec03f03a4f7c2 /mm/memcontrol-v1.c | |
| parent | dcf5b8a7ae4e3875878529597c05f8cac4121515 (diff) | |
| parent | f6388029ea9e2c9e807d73827658738ea131faee (diff) | |
Merge v6.18.51linux-rolling-lts
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/memcontrol-v1.c')
| -rw-r--r-- | mm/memcontrol-v1.c | 43 |
1 files changed, 26 insertions, 17 deletions
diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c index 74d3a4d78ec6..af8c9289e8e0 100644 --- a/mm/memcontrol-v1.c +++ b/mm/memcontrol-v1.c @@ -95,7 +95,6 @@ enum { RES_LIMIT, RES_MAX_USAGE, RES_FAILCNT, - RES_SOFT_LIMIT, }; #ifdef CONFIG_LOCKDEP @@ -1547,6 +1546,30 @@ static int mem_cgroup_hierarchy_write(struct cgroup_subsys_state *css, return -EINVAL; } +static u64 mem_cgroup_soft_limit_read(struct cgroup_subsys_state *css, + struct cftype *cft) +{ + return (u64)PAGE_COUNTER_MAX * PAGE_SIZE; +} + +static ssize_t mem_cgroup_soft_limit_write(struct kernfs_open_file *of, + char *buf, size_t nbytes, loff_t off) +{ + unsigned long nr_pages; + int ret; + + ret = page_counter_memparse(strstrip(buf), "-1", &nr_pages); + if (ret) + return ret; + + pr_warn_once("soft_limit_in_bytes is deprecated and will be removed. " + "Writing any value to this file has no effect. " + "Please report your usecase to linux-mm@kvack.org if you " + "depend on this functionality.\n"); + + return nbytes; +} + static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css, struct cftype *cft) { @@ -1583,8 +1606,6 @@ static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css, return (u64)counter->watermark * PAGE_SIZE; case RES_FAILCNT: return counter->failcnt; - case RES_SOFT_LIMIT: - return (u64)READ_ONCE(memcg->soft_limit) * PAGE_SIZE; default: BUG(); } @@ -1679,17 +1700,6 @@ static ssize_t mem_cgroup_write(struct kernfs_open_file *of, break; } break; - case RES_SOFT_LIMIT: - if (IS_ENABLED(CONFIG_PREEMPT_RT)) { - ret = -EOPNOTSUPP; - } else { - pr_warn_once("soft_limit_in_bytes is deprecated and will be removed. " - "Please report your usecase to linux-mm@kvack.org if you " - "depend on this functionality.\n"); - WRITE_ONCE(memcg->soft_limit, nr_pages); - ret = 0; - } - break; } return ret ?: nbytes; } @@ -2027,9 +2037,8 @@ struct cftype mem_cgroup_legacy_files[] = { }, { .name = "soft_limit_in_bytes", - .private = MEMFILE_PRIVATE(_MEM, RES_SOFT_LIMIT), - .write = mem_cgroup_write, - .read_u64 = mem_cgroup_read_u64, + .write = mem_cgroup_soft_limit_write, + .read_u64 = mem_cgroup_soft_limit_read, }, { .name = "failcnt", |