diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-20 11:52:56 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-20 12:04:25 -0400 |
| commit | 736729e9892357fc86ace5d566cc3a22826b50a5 (patch) | |
| tree | f394f07613a4f67f342928b3da6ba054ca8dd95b | |
| parent | 5c4fdb122e7d47af688ecbe28c1eedfbc697b648 (diff) | |
mm: Add shrinker_to_text() to debugfs interface
Previously, we added shrinker_to_text() and hooked it up to the OOM
report - now, the same report is available via debugfs.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | include/linux/shrinker.h | 1 | ||||
| -rw-r--r-- | mm/shrinker_debug.c | 18 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index a15a45d060dc..7e22c415608f 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -110,6 +110,7 @@ extern int __printf(2, 3) register_shrinker(struct shrinker *shrinker, extern void unregister_shrinker(struct shrinker *shrinker); extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); +void shrinker_to_text(struct seq_buf *, struct shrinker *); void shrinkers_to_text(struct seq_buf *); #ifdef CONFIG_SHRINKER_DEBUG diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index 3ab53fad8876..c5a260258777 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -2,6 +2,7 @@ #include <linux/idr.h> #include <linux/slab.h> #include <linux/debugfs.h> +#include <linux/seq_buf.h> #include <linux/seq_file.h> #include <linux/shrinker.h> #include <linux/memcontrol.h> @@ -171,6 +172,21 @@ static const struct file_operations shrinker_debugfs_scan_fops = { .write = shrinker_debugfs_scan_write, }; +static int shrinker_debugfs_report_show(struct seq_file *m, void *v) +{ + struct shrinker *shrinker = m->private; + char *bufp; + size_t buflen = seq_get_buf(m, &bufp); + struct seq_buf out; + + seq_buf_init(&out, bufp, buflen); + shrinker_to_text(&out, shrinker); + seq_commit(m, seq_buf_used(&out)); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(shrinker_debugfs_report); + int shrinker_debugfs_add(struct shrinker *shrinker) { struct dentry *entry; @@ -202,6 +218,8 @@ int shrinker_debugfs_add(struct shrinker *shrinker) &shrinker_debugfs_count_fops); debugfs_create_file("scan", 0220, entry, shrinker, &shrinker_debugfs_scan_fops); + debugfs_create_file("report", 0440, entry, shrinker, + &shrinker_debugfs_report_fops); return 0; } |