alex/bcachefs-tools
1
0
Fork 0
mirror of https://github.com/koverstreet/bcachefs-tools.git synced 2025-02-02 00:00:03 +03:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

If we failed to read /proc/meminfo, just run the shrinkers.

Browse Source
This commit is contained in:
Kent Overstreet 2021-03-31 12:50:09 -04:00
parent 40e14938ee
commit 98844616f6
1 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
linux/shrinker.c
View File

@ -28,7 +28,6 @@ void unregister_shrinker(struct shrinker *shrinker)
struct meminfo { struct meminfo {
u64 total; u64 total;
u64 available; u64 available;
}; };
static u64 parse_meminfo_line(const char *line) static u64 parse_meminfo_line(const char *line)
@ -50,7 +49,7 @@ static struct meminfo read_meminfo(void)
f = fopen("/proc/meminfo", "r"); f = fopen("/proc/meminfo", "r");
if (!f) if (!f)
die("error opening /proc/meminfo: %m"); return ret;
while ((len = getline(&line, &n, f)) != -1) { while ((len = getline(&line, &n, f)) != -1) {
if ((v = strcmp_prefix(line, "MemTotal:"))) if ((v = strcmp_prefix(line, "MemTotal:")))
@ -77,10 +76,18 @@ void run_shrinkers(void)
return; return;
info = read_meminfo(); info = read_meminfo();
if (info.total && info.available) {
want_shrink = (info.total >> 2) - info.available; want_shrink = (info.total >> 2) - info.available;
if (want_shrink <= 0) if (want_shrink <= 0)
return; return;
} else {
/* If we weren't able to read /proc/meminfo, we must be pretty
* low: */
want_shrink = 8 << 20;
}
mutex_lock(&shrinker_lock); mutex_lock(&shrinker_lock);
list_for_each_entry(shrinker, &shrinker_list, list) { list_for_each_entry(shrinker, &shrinker_list, list) {