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cgroup-util: optimization — open subtree_control file only once for all controllers

This commit is contained in:
Lennart Poettering 2017-11-17 18:03:22 +01:00
parent 5962e9db5e
commit 77fa610b22
1 changed files with 10 additions and 1 deletions
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11
src/basic/cgroup-util.c
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@ -2541,6 +2541,7 @@ int cg_unified_flush(void) {
}
int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *fs = NULL;
CGroupController c;
int r;
@ -2574,7 +2575,15 @@ int cg_enable_everywhere(CGroupMask supported, CGroupMask mask, const char *p) {
s[0] = mask & bit ? '+' : '-';
strcpy(s + 1, n);
r = write_string_file(fs, s, 0);
if (!f) {
f = fopen(fs, "we");
if (!f) {
log_debug_errno(errno, "Failed to open cgroup.subtree_control file of %s: %m", p);
break;
}
}
r = write_string_stream(f, s, 0);
if (r < 0)
log_debug_errno(r, "Failed to enable controller %s for %s (%s): %m", n, p, fs);
}