linux-kernel - Re: [patch 05/24] perfmon: X86 generic code (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:	Wed, 26 Nov 2008 23:48:38 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	eranian@...glemail.com, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, mingo@...e.hu, x86@...nel.org,
	eranian@...il.com, paulus@...ba.org
Subject: Re: [patch 05/24] perfmon: X86 generic code (x86)

Hi Andi,

On Wed, 26 Nov 2008 13:22:17 +0100 Andi Kleen <andi@...stfloor.org> wrote:
>
> On Wed, Nov 26, 2008 at 11:05:29PM +1100, Stephen Rothwell wrote:
> > 
> > On Wed, 26 Nov 2008 12:33:09 +0100 Andi Kleen <andi@...stfloor.org> wrote:
> > >
> > > > + * x86 does not need extra alignment requirements for the sampling buffer
> > > > + */
> > > > +#define PFM_ARCH_SMPL_ALIGN_SIZE	0
> > > > +
> > > > +asmlinkage void  pmu_interrupt(void);
> > > > +
> > > > +static inline void pfm_arch_bv_copy(u64 *a, u64 *b, int nbits)
> > > 
> > > All these bitmap wrappers just seem like unnecessary obfuscation.
> > > Could you just drop them and call the standard functions directly?
> > 
> > These were added after comments from the PowerPC maintainer since how the
> > bitmaps are accessed needs to be arch specific.
> 
> Why? They should not be exported outside, so endian shouldn't matter, should
> it?

See http://lkml.org/lkml/2008/11/9/281 and the followups.  Otherwise this
should be answered by Paul and Stephane.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

Content of type "application/pgp-signature" skipped