linux-kernel - Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20090516092645.GA11652@localhost>
Date:	Sat, 16 May 2009 17:26:45 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"hannes@...xchg.org" <hannes@...xchg.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tytso@....edu" <tytso@....edu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"elladan@...imo.com" <elladan@...imo.com>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"cl@...ux-foundation.org" <cl@...ux-foundation.org>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"minchan.kim@...il.com" <minchan.kim@...il.com>
Subject: Re: [PATCH -mm] vmscan: make mapped executable pages the first
	class citizen

On Tue, May 12, 2009 at 09:20:11PM +0800, Rik van Riel wrote:
> Wu Fengguang wrote:
> 
> >> Also, the change makes this comment:
> >>
> >> 	spin_lock_irq(&zone->lru_lock);
> >> 	/*
> >> 	 * Count referenced pages from currently used mappings as
> >> 	 * rotated, even though they are moved to the inactive list.
> >> 	 * This helps balance scan pressure between file and anonymous
> >> 	 * pages in get_scan_ratio.
> >> 	 */
> >> 	reclaim_stat->recent_rotated[!!file] += pgmoved;
> >>
> >> inaccurate.
> > 
> > Good catch, I'll just remove the stale "even though they are moved to
> > the inactive list".
> 
> Well, it is still true for !VM_EXEC pages.

This comment?

        Count referenced pages from currently used mappings as rotated, even
        though only some of them are actually re-activated. This helps...

Thanks,
Fengguang
--
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/