From: Will Deacon <will@kernel.org>
To: Christophe Leroy <christophe.leroy@csgroup.eu>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: Mark Rutland <mark.rutland@arm.com>,
Marc Zyngier <maz@kernel.org>,
linux-kernel@vger.kernel.org, Jonathan Marek <jonathan@marek.ca>,
Will Deacon <will@kernel.org>,
catalin.marinas@arm.com, linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>,
Ard Biesheuvel <ardb@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linux-arm-kernel@lists.infradead.org,
Paul Mackerras <paulus@samba.org>,
Thomas Gleixner <tglx@linutronix.de>,
kernel-team@android.com,
Andrew Morton <akpm@linux-foundation.org>,
Mike Rapoport <rppt@kernel.org>
Subject: Re: [PATCH v2] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge"
Date: Wed, 21 Jul 2021 11:47:53 +0100 [thread overview]
Message-ID: <162686329170.980657.905966885675716231.b4-ty@kernel.org> (raw)
In-Reply-To: <87r1fs1762.fsf@mpe.ellerman.id.au>
On Wed, 21 Jul 2021 17:02:13 +1000, Michael Ellerman wrote:
> This reverts commit c742199a014de23ee92055c2473d91fe5561ffdf.
>
> c742199a014d ("mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge")
> breaks arm64 in at least two ways for configurations where PUD or PMD
> folding occur:
>
> 1. We no longer install huge-vmap mappings and silently fall back to
> page-granular entries, despite being able to install block entries
> at what is effectively the PGD level.
>
> [...]
Thank you Michael! I owe you a beer next time I see you, if we don't go
extinct before then.
Applied to arm64 (for-next/fixes), thanks!
[1/1] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge"
https://git.kernel.org/arm64/c/d8a719059b9d
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
next prev parent reply other threads:[~2021-07-21 10:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-20 12:35 [PATCH 0/2] Fix arm64 boot regression in 5.14 Will Deacon
2021-07-20 12:35 ` [PATCH 1/2] Revert "powerpc/8xx: add support for huge pages on VMAP and VMALLOC" Will Deacon
2021-07-20 15:08 ` Christophe Leroy
2021-07-20 12:35 ` [PATCH 2/2] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge" Will Deacon
2021-07-20 12:39 ` [PATCH 0/2] Fix arm64 boot regression in 5.14 Ard Biesheuvel
2021-07-20 12:53 ` Marc Zyngier
2021-07-20 18:26 ` Christophe Leroy
2021-07-21 7:02 ` [PATCH v2] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge" Michael Ellerman
2021-07-21 10:47 ` Will Deacon [this message]
2021-07-23 12:04 ` Michael Ellerman
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