openssh/openssh-linux-new-oomkill.patch

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Index: openbsd-compat/port-linux.c
===================================================================
RCS file: /home/dtucker/openssh/cvs/openssh/openbsd-compat/port-linux.c,v
retrieving revision 1.9
diff -u -p -r1.9 port-linux.c
--- openbsd-compat/port-linux.c 10 Sep 2010 00:30:25 -0000 1.9
+++ openbsd-compat/port-linux.c 16 Nov 2010 05:10:13 -0000
@@ -208,14 +208,21 @@ ssh_selinux_change_context(const char *n
#endif /* WITH_SELINUX */
#ifdef LINUX_OOM_ADJUST
-#define OOM_ADJ_PATH "/proc/self/oom_adj"
/*
- * The magic "don't kill me", as documented in eg:
+ * The magic "don't kill me" values, old and new, as documented in eg:
* http://lxr.linux.no/#linux+v2.6.32/Documentation/filesystems/proc.txt
+ * http://lxr.linux.no/#linux+v2.6.36/Documentation/filesystems/proc.txt
*/
-#define OOM_ADJ_NOKILL -17
static int oom_adj_save = INT_MIN;
+static char *oom_adj_path = NULL;
+struct {
+ char *path;
+ int value;
+} oom_adjust[] = {
+ {"/proc/self/oom_score_adj", -1000}, /* new values, 2.6.36 and up */
+ {"/proc/self/oom_adj", -17}, /* old values, 2.6.35 and down */
+};
/*
* Tell the kernel's out-of-memory killer to avoid sshd.
@@ -224,23 +231,31 @@ static int oom_adj_save = INT_MIN;
void
oom_adjust_setup(void)
{
+ int i, value;
FILE *fp;
debug3("%s", __func__);
- if ((fp = fopen(OOM_ADJ_PATH, "r+")) != NULL) {
- if (fscanf(fp, "%d", &oom_adj_save) != 1)
- verbose("error reading %s: %s", OOM_ADJ_PATH, strerror(errno));
- else {
- rewind(fp);
- if (fprintf(fp, "%d\n", OOM_ADJ_NOKILL) <= 0)
- verbose("error writing %s: %s",
- OOM_ADJ_PATH, strerror(errno));
- else
- verbose("Set %s from %d to %d",
- OOM_ADJ_PATH, oom_adj_save, OOM_ADJ_NOKILL);
+ for (i = 0; i < 2; i++) {
+ oom_adj_path = oom_adjust[i].path;
+ value = oom_adjust[i].value;
+ if ((fp = fopen(oom_adj_path, "r+")) != NULL) {
+ if (fscanf(fp, "%d", &oom_adj_save) != 1)
+ verbose("error reading %s: %s", oom_adj_path,
+ strerror(errno));
+ else {
+ rewind(fp);
+ if (fprintf(fp, "%d\n", value) <= 0)
+ verbose("error writing %s: %s",
+ oom_adj_path, strerror(errno));
+ else
+ verbose("Set %s from %d to %d",
+ oom_adj_path, oom_adj_save, value);
+ }
+ fclose(fp);
+ return;
}
- fclose(fp);
}
+ oom_adj_path = NULL;
}
/* Restore the saved OOM adjustment */
@@ -250,13 +265,14 @@ oom_adjust_restore(void)
FILE *fp;
debug3("%s", __func__);
- if (oom_adj_save == INT_MIN || (fp = fopen(OOM_ADJ_PATH, "w")) == NULL)
+ if (oom_adj_save == INT_MIN || oom_adj_save == NULL ||
+ (fp = fopen(oom_adj_path, "w")) == NULL)
return;
if (fprintf(fp, "%d\n", oom_adj_save) <= 0)
- verbose("error writing %s: %s", OOM_ADJ_PATH, strerror(errno));
+ verbose("error writing %s: %s", oom_adj_path, strerror(errno));
else
- verbose("Set %s to %d", OOM_ADJ_PATH, oom_adj_save);
+ verbose("Set %s to %d", oom_adj_path, oom_adj_save);
fclose(fp);
return;