linux-kernel - Re: [PATCH -v2 09/10] m68k,mm: Fully initialize the page-table allocator

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20200207113714.GH14914@hirez.programming.kicks-ass.net>
Date:   Fri, 7 Feb 2020 12:37:14 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Will Deacon <will@...nel.org>,
        Michael Schmitz <schmitzmic@...il.com>,
        Greg Ungerer <gerg@...ux-m68k.org>
Subject: Re: [PATCH -v2 09/10] m68k,mm: Fully initialize the page-table
 allocator

On Fri, Feb 07, 2020 at 11:58:42AM +0100, Geert Uytterhoeven wrote:
> Hoi Peter,
> 
> Thanks for your patch!
> 
> On Fri, Jan 31, 2020 at 1:56 PM Peter Zijlstra <peterz@...radead.org> wrote:
> > Also iterate the PMD tables to populate the PTE table allocator. This
> > also fully replaces the previous zero_pgtable hack.
> 
> As no code is being removed in this patch, does this mean this case was
> broken since "[PATCH 06/10] m68k,mm: Improve kernel_page_table()"?

'broken' is not the right word, less optimal might qualify.

What this code does it add all the pages from the early kernel allocator
to the regular allocator, such that any left over fragments might be
used.