linux-kernel - Re: [00/41] Large Blocksize Support V7 (adds memmap support)

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]

Date:	Mon, 17 Sep 2007 15:10:00 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Bernd Schmidt <bernds_cb1@...nline.de>
cc:	Nick Piggin <nickpiggin@...oo.com.au>, Mel Gorman <mel@....ul.ie>,
	andrea@...e.de, torvalds@...ux-foundation.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@....de>, Mel Gorman <mel@...net.ie>,
	William Lee Irwin III <wli@...omorphy.com>,
	David Chinner <dgc@....com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Badari Pulavarty <pbadari@...il.com>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	Fengguang Wu <fengguang.wu@...il.com>,
	swin wang <wangswin@...il.com>, totty.lu@...il.com,
	hugh@...itas.com, joern@...ybastard.org
Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support)

On Mon, 17 Sep 2007, Bernd Schmidt wrote:

> Christoph Lameter wrote:
> > True. That is why we want to limit the number of unmovable allocations and
> > that is why ZONE_MOVABLE exists to limit those. However, unmovable
> > allocations are already rare today. The overwhelming majority of allocations
> > are movable and reclaimable. You can see that f.e. by looking at
> > /proc/meminfo and see how high SUnreclaim: is (does not catch everything but
> > its a good indicator).
> 
> Just to inject another factor into the discussion, please remember that Linux
> also runs on nommu systems, where things like user space allocations are
> neither movable nor reclaimable.

Hmmm.... However, sorting of the allocations would result in avoiding 
defragmentation to some degree?

-
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/