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Add support for oom_score_adj

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/proc/<pid>/oom_adj has been deprecated (kernel v2.6.36) due to the
rework of the badness heuristic; oom_score_adj is the replacement.
Keep a fallback to the old interface for compatibility with older
kernels.

See http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a63d83f427fbce97a6cea0db2e64b0eb8435cd10

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
This commit is contained in:
Luca Tettamanti 2010-08-23 14:35:37 +02:00 committed by Martin Pitt
parent 13f90be7a3
commit c61eea9459
1 changed files with 11 additions and 4 deletions
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15
udev/udevd.c
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@ -1285,12 +1285,19 @@ int main(int argc, char *argv[])
fclose(f);
}
/* OOM_DISABLE == -17 */
fd = open("/proc/self/oom_adj", O_RDWR);
fd = open("/proc/self/oom_score_adj", O_RDWR);
if (fd < 0) {
err(udev, "error disabling OOM: %m\n");
/* Fallback to old interface */
fd = open("/proc/self/oom_adj", O_RDWR);
if (fd < 0) {
err(udev, "error disabling OOM: %m\n");
} else {
/* OOM_DISABLE == -17 */
write(fd, "-17", 3);
close(fd);
}
} else {
write(fd, "-17", 3);
write(fd, "-1000", 5);
close(fd);
}