linux-kernel - Re: [RFC PATCH v4 03/16] mm: Provide mm_struct and address to huge_ptep

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Message-ID: <ZlVZqNfjCw5Ay5qo@localhost.localdomain>
Date: Tue, 28 May 2024 06:12:24 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Jason Gunthorpe <jgg@...dia.com>, Peter Xu <peterx@...hat.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [RFC PATCH v4 03/16] mm: Provide mm_struct and address to
 huge_ptep_get()

On Mon, May 27, 2024 at 03:30:01PM +0200, Christophe Leroy wrote:
> On powerpc 8xx huge_ptep_get() will need to know whether the given
> ptep is a PTE entry or a PMD entry. This cannot be known with the
> PMD entry itself because there is no easy way to know it from the
> content of the entry.
> 
> So huge_ptep_get() will need to know either the size of the page
> or get the pmd.
> 
> In order to be consistent with huge_ptep_get_and_clear(), give
> mm and address to huge_ptep_get().
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>

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

 

-- 
Oscar Salvador
SUSE Labs