linux-kernel - Re: [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86

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:	21 Mar 2008 23:30:54 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <clameter@....com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86

Christoph Lameter <clameter@....com> writes:

> This allows fallback for order 1 stack allocations. In the fallback
> scenario the stacks will be virtually mapped.

The traditional reason this was discouraged (people seem to reinvent
variants of this patch all the time) was that there used 
to be drivers that did __pa() (or equivalent) on stack addresses
and that doesn't work with vmalloc pages.

I don't know if such drivers still exist, but such a change
is certainly not a no-brainer

-Andi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/