linux-kernel - Re: [PATCH 35/40] lib: implement context capture support for tagged allocations

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Message-ID: <CAJuCfpGsvWupMbasqvwcMYsOOPxTQqi1ed5+=vyu-yoPQwwybg@mail.gmail.com>
Date:   Wed, 3 May 2023 08:24:19 -0700
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     Michal Hocko <mhocko@...e.com>
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Subject: Re: [PATCH 35/40] lib: implement context capture support for tagged allocations

On Wed, May 3, 2023 at 12:39 AM Michal Hocko <mhocko@...e.com> wrote:
>
> On Mon 01-05-23 09:54:45, Suren Baghdasaryan wrote:
> [...]
> > +struct codetag_ctx *alloc_tag_create_ctx(struct alloc_tag *tag, size_t size)
> > +{
> > +     struct alloc_call_ctx *ac_ctx;
> > +
> > +     /* TODO: use a dedicated kmem_cache */
> > +     ac_ctx = kmalloc(sizeof(struct alloc_call_ctx), GFP_KERNEL);
>
> You cannot really use GFP_KERNEL here. This is post_alloc_hook path and
> that has its own gfp context.

I missed that. Would it be appropriate to use the gfp_flags parameter
of post_alloc_hook() here?


> --
> Michal Hocko
> SUSE Labs