From: David Rientjes <rientjes@google.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Nitin Gupta <ngupta@vflare.org>,
hongshin@gmail.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH 7/9] swap_info: swap count continuations
Date: Thu, 15 Oct 2009 14:17:31 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.1.00.0910151414570.25796@chino.kir.corp.google.com> (raw)
In-Reply-To: <20091015123024.21ca3ef7.kamezawa.hiroyu@jp.fujitsu.com>
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.
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next prev parent reply other threads:[~2009-10-15 21:17 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-15 0:44 [PATCH 0/9] swap_info and swap_map patches Hugh Dickins
2009-10-15 0:46 ` [PATCH 1/9] swap_info: private to swapfile.c Hugh Dickins
2009-10-15 14:57 ` Rik van Riel
2009-10-15 23:10 ` Nigel Cunningham
2009-10-16 0:28 ` Hugh Dickins
2009-10-15 0:48 ` [PATCH 2/9] swap_info: change to array of pointers Hugh Dickins
2009-10-15 2:11 ` KAMEZAWA Hiroyuki
2009-10-15 22:41 ` Hugh Dickins
2009-10-15 23:04 ` Hugh Dickins
2009-10-15 23:47 ` KAMEZAWA Hiroyuki
2009-10-15 23:46 ` KAMEZAWA Hiroyuki
2009-10-15 15:02 ` Rik van Riel
2009-10-15 0:49 ` [PATCH 3/9] swap_info: include first_swap_extent Hugh Dickins
2009-10-15 0:50 ` [PATCH 4/9] swap_info: miscellaneous minor cleanups Hugh Dickins
2009-10-15 2:19 ` KAMEZAWA Hiroyuki
2009-10-15 22:01 ` Hugh Dickins
2009-10-16 0:41 ` [PATCH 4/9 v2] " Hugh Dickins
2009-10-15 0:52 ` [PATCH 5/9] swap_info: SWAP_HAS_CACHE cleanups Hugh Dickins
2009-10-15 2:37 ` KAMEZAWA Hiroyuki
2009-10-15 22:08 ` Hugh Dickins
2009-10-15 0:53 ` [PATCH 6/9] swap_info: swap_map of chars not shorts Hugh Dickins
2009-10-15 2:44 ` KAMEZAWA Hiroyuki
2009-10-15 22:17 ` Hugh Dickins
2009-10-15 23:52 ` KAMEZAWA Hiroyuki
2009-10-15 0:56 ` [PATCH 7/9] swap_info: swap count continuations Hugh Dickins
2009-10-15 3:30 ` KAMEZAWA Hiroyuki
2009-10-15 19:45 ` Andrew Morton
2009-10-15 21:17 ` David Rientjes [this message]
2009-10-16 0:21 ` Hugh Dickins
2009-10-15 23:53 ` Hugh Dickins
2009-10-16 1:29 ` KAMEZAWA Hiroyuki
2009-10-16 2:24 ` Hugh Dickins
2009-10-16 4:06 ` KAMEZAWA Hiroyuki
2009-10-16 4:49 ` Nitin Gupta
2009-10-16 6:30 ` [PATCH] mm: call pte_unmap() against a proper pte (Re: [PATCH 7/9] swap_info: swap count continuations) Daisuke Nishimura
2009-10-16 8:01 ` KAMEZAWA Hiroyuki
2009-10-15 0:57 ` [PATCH 8/9] swap_info: note SWAP_MAP_SHMEM Hugh Dickins
2009-10-15 3:32 ` KAMEZAWA Hiroyuki
2009-10-15 22:23 ` Hugh Dickins
2009-10-16 0:04 ` KAMEZAWA Hiroyuki
2009-10-15 0:58 ` [PATCH 9/9] swap_info: reorder its fields Hugh Dickins
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