linux-kernel - Re: [PATCH v6 13/18] asm-generic/tlb: Introduce HAVE_MMU_GATHER_NO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190219124758.GF8501@fuggles.cambridge.arm.com>
Date:   Tue, 19 Feb 2019 12:47:58 +0000
From:   Will Deacon <will.deacon@....com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     aneesh.kumar@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
        npiggin@...il.com, linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux@...linux.org.uk,
        heiko.carstens@...ibm.com, riel@...riel.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [PATCH v6 13/18] asm-generic/tlb: Introduce
 HAVE_MMU_GATHER_NO_GATHER

On Tue, Feb 19, 2019 at 11:32:01AM +0100, Peter Zijlstra wrote:
> Add the Kconfig option HAVE_MMU_GATHER_NO_GATHER to the generic
> mmu_gather code. If the option is set the mmu_gather will not
> track individual pages for delayed page free anymore. A platform
> that enables the option needs to provide its own implementation
> of the __tlb_remove_page_size function to free pages.
> 
> Cc: npiggin@...il.com
> Cc: heiko.carstens@...ibm.com
> Cc: will.deacon@....com
> Cc: aneesh.kumar@...ux.vnet.ibm.com
> Cc: akpm@...ux-foundation.org
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: linux@...linux.org.uk
> Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> Link: http://lkml.kernel.org/r/20180918125151.31744-2-schwidefsky@de.ibm.com
> ---
>  arch/Kconfig              |    3 +
>  include/asm-generic/tlb.h |    9 +++
>  mm/mmu_gather.c           |  107 +++++++++++++++++++++++++---------------------
>  3 files changed, 70 insertions(+), 49 deletions(-)

Acked-by: Will Deacon <will.deacon@....com>

Will