linux-kernel - Re: [RFC] NUMA : could we introduce virt_to

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: <20070323145323.e3590899.dada1@cosmosbay.com>
Date:	Fri, 23 Mar 2007 14:53:23 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	"Pekka Enberg" <penberg@...helsinki.fi>
Cc:	"Andi Kleen" <andi@...stfloor.org>,
	"Christoph Lameter" <christoph@...eter.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"linux kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] NUMA : could we introduce virt_to_nid() ?

On Fri, 23 Mar 2007 14:48:24 +0200
"Pekka Enberg" <penberg@...helsinki.fi> wrote:

> On 3/23/07, Eric Dumazet <dada1@...mosbay.com> wrote:
> > Checking Christoph quicklist implementation, I found the same cache miss in
> > free() than SLAB has.
> >
> > /* common implementation *
> > int virt_to_nid(const void *addr)
> > {
> >         struct page *page = virt_to_page(addr);
> >         return page_to_nid(page);
> > }
> >
> > On some platforms (x86_64 for example), could we have a better implementation,
> > not accessing struct page, but using phys_to_nid() ?
> 
> Sounds good to me. At least cache_free_alien() in mm/slab.c to should
> be converted to use it.
> 

Not yet :(

Because in slab we currently need virt_to_slab(addr)->nodeid, not page_to_nid(virt_to_page(addr))

It might be different, according to Christoph
-
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/