From: Michael Ellerman <mpe@ellerman•id.au>
To: Will Deacon <will@kernel•org>,
Christophe Leroy <christophe.leroy@csgroup•eu>
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: Fri, 23 Jul 2021 22:04:10 +1000 [thread overview]
Message-ID: <87o8at1bk5.fsf@mpe.ellerman.id.au> (raw)
In-Reply-To: <162686329170.980657.905966885675716231.b4-ty@kernel.org>
Will Deacon <will@kernel•org> writes:
> 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.
No worries, thanks to Christophe for identifying the solution while on
vacation!
Beers seem a long way off, but hopefully one day :)
cheers
prev parent reply other threads:[~2021-07-23 12:04 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
2021-07-23 12:04 ` Michael Ellerman [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87o8at1bk5.fsf@mpe.ellerman.id.au \
--to=mpe@ellerman$(echo .)id.au \
--cc=akpm@linux-foundation$(echo .)org \
--cc=ardb@kernel$(echo .)org \
--cc=catalin.marinas@arm$(echo .)com \
--cc=christophe.leroy@csgroup$(echo .)eu \
--cc=geert@linux-m68k$(echo .)org \
--cc=jonathan@marek$(echo .)ca \
--cc=kernel-team@android$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linuxppc-dev@lists$(echo .)ozlabs.org \
--cc=mark.rutland@arm$(echo .)com \
--cc=maz@kernel$(echo .)org \
--cc=npiggin@gmail$(echo .)com \
--cc=paulus@samba$(echo .)org \
--cc=rppt@kernel$(echo .)org \
--cc=tglx@linutronix$(echo .)de \
--cc=will@kernel$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox