Messages in this thread | | | Date | Mon, 26 Oct 2015 14:42:57 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCHv2 4.3-rc6] proc: fix convert from oom_score_adj to oom_adj |
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On Thu, 22 Oct 2015, Hongjie Fang (方洪杰) wrote:
> > The oom_adj has been replaced by oom_score_adj in kernel, > but the /proc/pid/oom_adj is provided for legacy purposes. > When write/read a value into/from /proc/pid/oom_adj, > there is a transformation between oom_adj and oom_score_adj. > > After writing a new value into /proc/pid/oom_adj, then read it. > The return value is a different value than you wrote. > Fix this by adding a adjustment factor. >
You're only looking at the output and seeing that it disagrees with what was written and ignoring _why_ it disagrees.
It's because, as I already stated, oom_score_adj is the effective tunable for oom kill process prioritization and the legacy oom_adj had a different scale where a 1:1 mapping is not possible.
All throughout the kernel, we report the effective value. We accept writes and the reads report the effective value. This is no different.
Nack again. | |