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authorDavid Rientjes <rientjes@google.com>2012-11-12 17:53:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-11-16 10:15:35 -0800
commitfa0cbbf145aabbf29c6f28f8a11935c0b0fd86fc (patch)
treefd2626b68b0f78afa128d7772c49f066e339bd3a /include
parentf4bcd79c88d25508643084e6fed25920485db0eb (diff)
mm, oom: reintroduce /proc/pid/oom_adj
This is mostly a revert of 01dc52ebdf47 ("oom: remove deprecated oom_adj") from Davidlohr Bueso. It reintroduces /proc/pid/oom_adj for backwards compatibility with earlier kernels. It simply scales the value linearly when /proc/pid/oom_score_adj is written. The major difference is that its scheduled removal is no longer included in Documentation/feature-removal-schedule.txt. We do warn users with a single printk, though, to suggest the more powerful and supported /proc/pid/oom_score_adj interface. Reported-by: Artem S. Tashkinov <t.artem@lycos.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/oom.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/uapi/linux/oom.h b/include/uapi/linux/oom.h
index a49c4afc706..b29272d621c 100644
--- a/include/uapi/linux/oom.h
+++ b/include/uapi/linux/oom.h
@@ -8,4 +8,13 @@
#define OOM_SCORE_ADJ_MIN (-1000)
#define OOM_SCORE_ADJ_MAX 1000
+/*
+ * /proc/<pid>/oom_adj set to -17 protects from the oom killer for legacy
+ * purposes.
+ */
+#define OOM_DISABLE (-17)
+/* inclusive */
+#define OOM_ADJUST_MIN (-16)
+#define OOM_ADJUST_MAX 15
+
#endif /* _UAPI__INCLUDE_LINUX_OOM_H */