linux-kernel - Re: Regression: x86/mm: new _PTE_SWP_SOFT_DIRTY bit conflicts with existing use

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: <20130822131221.GM18673@moon>
Date:	Thu, 22 Aug 2013 17:12:21 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Andy Lutomirski <luto@...capital.net>,
	Pavel Emelyanov <xemul@...allels.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>, Xen-devel@...ts.xen.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Jan Beulich <jbeulich@...e.com>
Subject: Re: Regression: x86/mm: new _PTE_SWP_SOFT_DIRTY bit conflicts with
 existing use

On Thu, Aug 22, 2013 at 03:37:33PM +0900, Minchan Kim wrote:
> > 
> > Look, good thing is that 7th bit also available on the 4level pages
> > (ie x86-64) without additional code modification, that's why I picked
> > it in first place. I prepared the patch locally which doesn't use
> > pse bit for tracking but it only makes code more complex.
> 
> I'm not sure you read this thread.
> http://comments.gmane.org/gmane.linux.kernel.mm/101756
> In summary, I'd like to use it to track sub-ranges of some processes.
> 
> I already had a time to investigate and it enhanced our workload x2 on ARM
> so I'd like to expand the concept for more general purpose.
> 
> For it, arch-specific stuff would be hurdle for port.
> So, I support your non-arch-specific solutions.
> Just FYI. Such future plan shouldn't force you.

Hi Minchan, thanks for info, I'll read the thread (sorry for delay,
managed to miss your email).
--
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/