Re: [PATCH v1 1/1] mm: Fix OOM killer and proc stats inaccuracy on large many-core systems

On Tue, 13 Jan 2026 20:22:16 -0500 Mathieu Desnoyers [off-list ref] wrote:

On 2026-01-13 18:55, Andrew Morton wrote:

quoted

On Tue, 13 Jan 2026 17:16:16 -0500 Mathieu Desnoyers [off-list ref] wrote:

quoted

The hpcc series introduces an approximation which provides accuracy
limits on the approximation that make the result is still somewhat
meaninful on large many core systems.

Can we leave the non-oom related parts of procfs as-is for now, then
migrate them over to hpcc when that is available?  Safer that way.

Of course.

So AFAIU the plan is:

1) update the oom accuracy fix to only use the precise sum for
    the oom killer, no changes to procfs ABIs. This targets mm-new.

2) update the hpcc series to base them on top of the new fix from (1).
    Update their commit messages to indicate that they bring accuracy
    improvements to the procfs ABI on large many-core systems, as well as
    latency improvements to the oom killer. This will target upstreaming
    after the next merge window, but I will still post it soon to gather
    feedback.

Does that plan look OK ?

Perfect, thanks.  Except there is no "(1)".  We shall survive ;)