linux-kernel - Re: [PATCH v2 4/7] mm/gup: remove gup_fast_pgd

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Message-ID: <Z-v0IRYjisOuNnMZ@localhost.localdomain>
Date: Tue, 1 Apr 2025 16:11:45 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Baoquan He <bhe@...hat.com>
Cc: akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, yanjun.zhu@...ux.dev
Subject: Re: [PATCH v2 4/7] mm/gup: remove gup_fast_pgd_leaf() and clean up
 the relevant codes

On Mon, Mar 31, 2025 at 04:13:24PM +0800, Baoquan He wrote:
> In the current kernel, only pud huge page is supported in some
> architectures. P4d and pgd huge pages haven't been supported yet.
> And in mm/gup.c, there's no pgd huge page handling in the
> follow_page_mask() code path. Hence it doesn't make sense to have
> gup_fast_pgd_leaf() in gup_fast code path.
> 
> Here remove gup_fast_pgd_leaf() and clean up the relevant codes.
> 
> Signed-off-by: Baoquan He <bhe@...hat.com>

Reviewed-by: Oscar Salvador <osalvador@...e.de>

 

-- 
Oscar Salvador
SUSE Labs