linux-kernel - Re: [PATCH v3 0/3] x86/mm/64: Remove vmalloc/ioremap pgtable synchronization

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]

Date:   Tue, 21 Jul 2020 13:44:36 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     x86@...nel.org, hpa@...or.com,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Joerg Roedel <jroedel@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/3] x86/mm/64: Remove vmalloc/ioremap pgtable
 synchronization

On Tue, Jul 21, 2020 at 11:59:50AM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> Hi,
> 
> here is the third version of the patches to pre-allocate P4D/PUD pages
> for the vmalloc/ioremap areas on x86-64. This makes the page-table
> synchronization code obsolete and so it is also removed.
> 
> Please review.
> 
> Thanks,
> 
> 	Joerg
> 
> Changes to v2:
> 
> 	- Rebased to tip/master
> 	- Some rewording of the commit-messages 

I have a small nitpick for the commit message of the first patch,
otheriwise,

Reviewed-by: Mike Rapoport <rppt@...ux.ibm.com>

 
> Joerg Roedel (3):
>   x86/mm: Pre-allocate p4d/pud pages for vmalloc area
>   x86/mm/64: Do not sync vmalloc/ioremap mappings
>   x86/mm/64: Make sync_global_pgds() static
> 
>  arch/x86/include/asm/pgtable_64.h       |  2 -
>  arch/x86/include/asm/pgtable_64_types.h |  2 -
>  arch/x86/mm/init_64.c                   | 59 ++++++++++++++++++++++---
>  3 files changed, 53 insertions(+), 10 deletions(-)
> 
> -- 
> 2.27.0
> 

-- 
Sincerely yours,
Mike.