linux-kernel - Re: [PATCH v6 14/37] lib: introduce support for page allocation tagging

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Date: Mon, 25 Mar 2024 23:23:25 -0700
From: Suren Baghdasaryan <surenb@...gle.com>
To: Matthew Wilcox <willy@...radead.org>
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Subject: Re: [PATCH v6 14/37] lib: introduce support for page allocation tagging

On Mon, Mar 25, 2024 at 8:12 PM Matthew Wilcox <willy@...radead.org> wrote:
>
> On Thu, Mar 21, 2024 at 09:36:36AM -0700, Suren Baghdasaryan wrote:
> > +++ b/include/linux/pgalloc_tag.h
> > @@ -0,0 +1,78 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * page allocation tagging
> > + */
> > +#ifndef _LINUX_PGALLOC_TAG_H
> > +#define _LINUX_PGALLOC_TAG_H
> > +
> > +#include <linux/alloc_tag.h>
> > +
> > +#ifdef CONFIG_MEM_ALLOC_PROFILING
> > +
> > +#include <linux/page_ext.h>
> > +
> > +extern struct page_ext_operations page_alloc_tagging_ops;
> > +extern struct page_ext *page_ext_get(struct page *page);
> > +extern void page_ext_put(struct page_ext *page_ext);
>
> Why are you duplicating theses two declarations?
>
> I just deleted them locally and don't see any build problems.  tested with
> x86-64 defconfig (full build), allnoconfig full build and allmodconfig
> mm/ and fs/ (nobody has time to build allmodconfig drivers/)

Ah, good eye! We probably didn't include page_ext.h before and then
when we did I missed removing these declarations. I'll post a fixup.
Thanks!