On Wed 14-02-24 01:20:20, Johannes Weiner wrote: [...] > I agree we should discuss how the annotations are implemented on a > technical basis, but my take is that we need something like this. I do not think there is any disagreement on usefulness of a better memory allocation tracking. At least for me the primary problem is the implementation. At LFSMM last year we have heard that existing tracing infrastructure hasn't really been explored much. Cover letter doesn't really talk much about those alternatives so it is really hard to evaluate whether the proposed solution is indeed our best way to approach this. > In a codebase of our size, I don't think the allocator should be > handing out memory without some basic implied tracking of where it's > going. It's a liability for production environments, and it can hide > bad memory management decisions in drivers and other subsystems for a > very long time. Fully agreed! It is quite common to see oom reports with a large portion of memory unaccounted and this really presents additional cost on the debugging side. -- Michal Hocko SUSE Labs
