From: Maxwell Bland <mbland@motorola.com>
To: David Hildenbrand <david@redhat.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
"linux-arm-kernel@lists.infradead.org"
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Andrew Wheeler <awheeler@motorola.com>
Subject: RE: [External] Re: [PATCH 2/4] mm: pgalloc: support address-conditional pmd allocation
Date: Wed, 21 Feb 2024 15:54:38 +0000 [thread overview]
Message-ID: <SEZPR03MB6786F9F84DBC9B5DD952C70AB4572@SEZPR03MB6786.apcprd03.prod.outlook.com> (raw)
In-Reply-To: <cf5409c3-254a-459b-8969-429db2ec6439@redhat.com>
> On February 21, 2024 3:27 AM David Hildenbrand wrote
> On 21.02.24 08:13, Christophe Leroy wrote:
> > Le 20/02/2024 à 21:32, Maxwell Bland a écrit :
> >>
> >> While other descriptors (e.g. pud) allow allocations conditional on
> >> which virtual address is allocated, pmd descriptor allocations do not.
> >> However, adding support for this is straightforward and is beneficial to
> >> future kernel development targeting the PMD memory granularity.
> >>
> >> As many architectures already implement pmd_populate_kernel in an
> >> address-generic manner, it is necessary to roll out support
> >> incrementally. For this purpose a preprocessor flag,
> >
> > Is it really worth it ? It is only 48 call sites that need to be
> > updated. It would avoid that processor flag and avoid introducing that
> > pmd_populate_kernel_at() in kernel core.
>
> +1, let's avoid that if possible.
Will fix, thank you!
Maxwell
next prev parent reply other threads:[~2024-02-21 15:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-20 20:32 [PATCH 0/4] arm64: mm: support dynamic vmalloc/pmd configuration Maxwell Bland
2024-02-20 20:32 ` [PATCH 1/4] mm/vmalloc: allow arch-specific vmalloc_node overrides Maxwell Bland
2024-02-21 5:43 ` Christoph Hellwig
2024-02-21 7:38 ` Christophe Leroy
2024-02-21 6:59 ` Christophe Leroy
2024-02-21 17:19 ` Maxwell Bland
2024-02-21 18:25 ` kernel test robot
2024-02-20 20:32 ` [PATCH 2/4] mm: pgalloc: support address-conditional pmd allocation Maxwell Bland
2024-02-21 7:13 ` Christophe Leroy
2024-02-21 9:27 ` David Hildenbrand
2024-02-21 15:54 ` Maxwell Bland [this message]
2024-02-21 16:57 ` kernel test robot
2024-02-21 17:08 ` kernel test robot
2024-02-20 20:32 ` [PATCH 3/4] arm64: separate code and data virtual memory allocation Maxwell Bland
2024-02-21 7:20 ` Christophe Leroy
2024-02-20 20:32 ` [PATCH 4/4] arm64: dynamic enforcement of pmd-level PXNTable Maxwell Bland
2024-02-21 7:32 ` [PATCH 0/4] arm64: mm: support dynamic vmalloc/pmd configuration Christophe Leroy
2024-02-21 17:57 ` Maxwell Bland
2024-02-21 14:50 ` Conor Dooley
2024-02-21 15:42 ` [External] " Maxwell Bland
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