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SubjectRe: 答复: [PATCHv2 4.3-rc6] proc: fix convert from oom score adj to oom adj
On Wed, 28 Oct 2015, Hongjie Fang (方洪杰) wrote:

> Under a userspace perspective, get a different value than he wrote,
> it must be confusing.
>

It's confusing, but with purpose: it shows there is no direct mapping
between /proc/pid/oom_adj and /proc/pid/oom_score_adj.
/proc/pid/oom_score_adj is the effective policy and has been for years.
The value returned by /proc/pid/oom_adj demonstrates reality vs what is
perceived and is a side-effect of integer division truncating the result
in C.

It's a bad situation, I agree, and we anticipated the complete removal of
/proc/pid/oom_adj years ago since it has been deprecated for years. Maybe
one day we can convince Linus that is possible, but until then we're stuck
with it.
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