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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2012-10-30 00:09:18 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2012-10-30 00:09:18 -0700
commit68fe0f0a6dcd2ac1ace5da3647a6d1cf0f4d2fea (patch)
tree69d855c2e46d42ef8f23680cf3a1e6ff38de9ef4 /Documentation/ABI/obsolete
parent88fd449e734a4264347e12b8ff74ccb33a9b9a35 (diff)
parent8f0d8163b50e01f398b14bcd4dc039ac5ab18d64 (diff)
Merge tag 'v3.7-rc3' into for-linus to sync up with recent USB changes
Diffstat (limited to 'Documentation/ABI/obsolete')
-rw-r--r--Documentation/ABI/obsolete/proc-pid-oom_adj22
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diff --git a/Documentation/ABI/obsolete/proc-pid-oom_adj b/Documentation/ABI/obsolete/proc-pid-oom_adj
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--- a/Documentation/ABI/obsolete/proc-pid-oom_adj
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-What: /proc/<pid>/oom_adj
-When: August 2012
-Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
- badness heuristic used to determine which task to kill when the kernel
- is out of memory.
-
- The badness heuristic has since been rewritten since the introduction of
- this tunable such that its meaning is deprecated. The value was
- implemented as a bitshift on a score generated by the badness()
- function that did not have any precise units of measure. With the
- rewrite, the score is given as a proportion of available memory to the
- task allocating pages, so using a bitshift which grows the score
- exponentially is, thus, impossible to tune with fine granularity.
-
- A much more powerful interface, /proc/<pid>/oom_score_adj, was
- introduced with the oom killer rewrite that allows users to increase or
- decrease the badness score linearly. This interface will replace
- /proc/<pid>/oom_adj.
-
- A warning will be emitted to the kernel log if an application uses this
- deprecated interface. After it is printed once, future warnings will be
- suppressed until the kernel is rebooted.