linux-kernel - Re: [PATCH 7/9] swap_info: swap count continuations

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: <alpine.DEB.1.00.0910151414570.25796@chino.kir.corp.google.com>
Date:	Thu, 15 Oct 2009 14:17:31 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
cc:	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nitin Gupta <ngupta@...are.org>, hongshin@...il.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 7/9] swap_info: swap count continuations

On Thu, 15 Oct 2009, KAMEZAWA Hiroyuki wrote:

> Hmm...maybe I don't understand the benefit of this style of data structure.
> 
> Do we need fine grain chain ? 
> Is  array of "unsigned long" counter is bad ?  (too big?)
> 

I'm wondering if flex_array can be used for this purpose, which can store 
up to 261632 elements of size unsigned long with 4K pages, or whether 
finding the first available bit or weight would be too expensive.
--
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/