linux-kernel - Re: [PATCH 10/11] maps3: add /proc/kpagecount and /proc/kpageflags interfaces

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:	Mon, 15 Oct 2007 18:07:59 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	Matt Mackall <mpm@...enic.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	David Rientjes <rientjes@...gle.com>,
	Fengguang Wu <wfg@...l.ustc.edu.cn>
Subject: Re: [PATCH 10/11] maps3: add /proc/kpagecount and /proc/kpageflags
	interfaces

On Mon, 2007-10-15 at 19:58 -0500, Matt Mackall wrote:
> 
> > For the bits that we want to export, we could also add the unoptimized
> > access functions for any that don't already have them:
> > 
> > #define __ClearPageReserved(page)       __clear_bit(PG_reserved, &(page)->flags)
> 
> Confused. Why are we interested in clear? 

We're not.  I just grabbed a random line to show the non-atomic
accessors.  Any actual one we'd need to add would be:

#define __PageBuddy(page)         __test_bit(PG_buddy, &(page)->flags)

It looks like we don't have any of these non-atomic ones for plain
__PageFoo().  So, we'd have to add them for each one that we wanted.
Still not much work, and still satisfies the "grep test". :)

-- Dave

-
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/