linux-kernel - Re: *sigh* /proc/*/pagemap

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, 7 Jul 2008 11:34:16 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Matt Mackall <mpm@...enic.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	torvalds@...uxfoundation.org, akpm@...uxfoundation.org,
	linux-kernel@...r.kernel.org, Dave Hansen <dave@...ux.vnet.ibm.com>
Subject: Re: *sigh* /proc/*/pagemap



On Mon, 7 Jul 2008, Matt Mackall wrote:
> 
> It exists to make the VM stop being a big black box. Before now the VM
> exposed little beyond statistics, many of which are basically
> meaningless (RSS?). With pagemap, you can actually see precisely where
> things are getting allocated, how they're getting shared, etc. Think
> NUMA, think cell phones.

Umm. How about setting it under CONFIG_DEBUG_VM or something like that 
then?

Right now it's not even _asked_ about, unless you're EMBEDDED, and 
defaults to 'y'. Which means that it has all the downsides, an none of the 
upsides, for 99.99% of all users.

			Linus
--
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/