[RFC PATCH 08/13] mm/damon/dbgfs: Support prioritization weights
From: <hidden>
Date: 2021-05-31 15:00:50
Also in:
linux-doc, lkml
Subsystem:
damon, memory management, the rest · Maintainers:
SeongJae Park, Andrew Morton, Linus Torvalds
From: SeongJae Park <redacted> This commit allows DAMON debugfs interface users set the prioritization weights by putting three more numbers to the 'schemes' file. Signed-off-by: SeongJae Park <redacted> --- mm/damon/dbgfs.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/mm/damon/dbgfs.c b/mm/damon/dbgfs.c
index ea6d4fdb57fa..b90287b1e576 100644
--- a/mm/damon/dbgfs.c
+++ b/mm/damon/dbgfs.c@@ -227,11 +227,14 @@ static ssize_t sprint_schemes(struct damon_ctx *c, char *buf, ssize_t len) damon_for_each_scheme(s, c) { rc = scnprintf(&buf[written], len - written, - "%lu %lu %u %u %u %u %d %lu %lu %lu %lu\n", + "%lu %lu %u %u %u %u %d %lu %lu %u %u %u %lu %lu\n", s->min_sz_region, s->max_sz_region, s->min_nr_accesses, s->max_nr_accesses, s->min_age_region, s->max_age_region, s->action, s->limit.sz, s->limit.ms, + s->limit.weight_sz, + s->limit.weight_nr_accesses, + s->limit.weight_age, s->stat_count, s->stat_sz); if (!rc) return -ENOMEM;
@@ -313,11 +316,14 @@ static struct damos **str_to_schemes(const char *str, ssize_t len, while (pos < len && *nr_schemes < max_nr_schemes) { struct damos_speed_limit limit = {}; - ret = sscanf(&str[pos], "%lu %lu %u %u %u %u %u %lu %lu%n", + ret = sscanf(&str[pos], + "%lu %lu %u %u %u %u %u %lu %lu %u %u %u%n", &min_sz, &max_sz, &min_nr_a, &max_nr_a, &min_age, &max_age, &action, &limit.sz, - &limit.ms, &parsed); - if (ret != 9) + &limit.ms, &limit.weight_sz, + &limit.weight_nr_accesses, &limit.weight_age, + &parsed); + if (ret != 12) break; if (!damos_action_valid(action)) { pr_err("wrong action %d\n", action);
@@ -1141,7 +1147,7 @@ static ssize_t dbgfs_monitor_on_write(struct file *file, static ssize_t dbgfs_version_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { - return simple_read_from_buffer(buf, count, ppos, "1\n", 2); + return simple_read_from_buffer(buf, count, ppos, "2\n", 2); } static const struct file_operations mk_contexts_fops = {
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2.17.1