linux-kernel - Re: [PATCH 1/1] lib: do limited memory accounting for modules with ARCH_NEEDS_WEAK_PER

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Message-ID: <CAJuCfpGMDz7jKCLTVFZZB+XVAb9jfK79C1kNa7-BsYGDT7hj3w@mail.gmail.com>
Date: Wed, 3 Apr 2024 15:31:16 -0700
From: Suren Baghdasaryan <surenb@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: sfr@...b.auug.org.au, kent.overstreet@...ux.dev, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH 1/1] lib: do limited memory accounting for modules with ARCH_NEEDS_WEAK_PER_CPU

On Wed, Apr 3, 2024 at 2:57 PM Andrew Morton <akpm@...ux-foundationorg> wrote:
>
> On Tue,  2 Apr 2024 11:09:33 -0700 Suren Baghdasaryan <surenb@...gle.com> wrote:
>
> > ARCH_NEEDS_WEAK_PER_CPU does not allow percpu variable definitions inside
> > a function, therefore memory allocation profiling can't use it. This
> > definition is used only for modules, so we still can account core kernel
> > allocations and for modules we can do limited allocation accounting by
> > charging all of them to a single counter. This is not ideal but better
>
> I'll queue this as a to-be-squashed fix against "lib: add allocation
> tagging support for memory allocation profiling", OK?

Yes, that would be ideal. Thank you!