From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andrew Morton <akpm@osdl.org>
Cc: andrea@novell.com, linux-kernel@vger.kernel.org
Subject: Re: ZONE_PADDING wastes 4 bytes of the new cacheline
Date: Fri, 22 Oct 2004 13:35:27 +1000 [thread overview]
Message-ID: <41787FFF.9060502@yahoo.com.au> (raw)
In-Reply-To: <20041021202656.08788551.akpm@osdl.org>
Andrew Morton wrote:
> Nick Piggin <nickpiggin@yahoo.com.au> wrote:
>
>>Andrew Morton wrote:
>>
>>I think they probably should be turned on. A system with a gig of ram
>>shouldn't be able to use up all of ZONE_DMA on pagecache. It seems like
>>a small price to pay... same goes for very big highmem systems and ZONE_NORMAL.
>
>
> Problem is, how much lower zone memory do you reserve? If someone is
> really getting hit by this in real life then the answer for their workload
> is probably "lots". If they are not getting hit then the answer is "none".
>
Yeah you might be right... although the ZONE_NORMAL can still be used
for other things like slab caches.
> Any halfway setting will screw everyone.
>
>
I guess what we really need to do is find someone who is getting hit by it.
Andrea do you have any pointers?
next prev parent reply other threads:[~2004-10-22 3:41 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-21 1:17 ZONE_PADDING wastes 4 bytes of the new cacheline Andrea Arcangeli
2004-10-21 3:10 ` Nick Piggin
2004-10-21 4:36 ` Andrew Morton
2004-10-21 4:53 ` Nick Piggin
2004-10-21 10:51 ` Mikael Pettersson
2004-10-21 12:45 ` Andrea Arcangeli
2004-10-21 18:54 ` Adam Heath
2004-10-21 20:21 ` DaMouse
2004-10-21 21:24 ` Jon Masters
2004-10-22 10:09 ` DaMouse
2004-10-21 22:26 ` Nick Piggin
2004-10-21 22:45 ` Andrea Arcangeli
2004-10-22 0:34 ` Nick Piggin
2004-10-22 1:10 ` Andrea Arcangeli
2004-10-22 1:26 ` Andrew Morton
2004-10-22 2:55 ` Jesse Barnes
2004-10-22 3:38 ` Nick Piggin
2004-10-22 3:49 ` Jesse Barnes
2004-10-22 17:15 ` Andrea Arcangeli
2004-10-22 3:09 ` Nick Piggin
2004-10-22 3:26 ` Andrew Morton
2004-10-22 3:35 ` Nick Piggin [this message]
2004-10-22 17:13 ` Andrea Arcangeli
2004-10-22 17:07 ` Andrea Arcangeli
2004-10-22 15:50 ` Andrea Arcangeli
2004-10-22 3:02 ` Nick Piggin
2004-10-22 16:58 ` Andrea Arcangeli
2004-10-23 4:33 ` Nick Piggin
2004-10-23 9:59 ` Andrea Arcangeli
2004-10-23 10:22 ` Nick Piggin
2004-10-23 11:03 ` Andrea Arcangeli
2004-10-23 16:28 ` Nick Piggin
2004-10-25 12:44 ` Andrea Arcangeli
2004-10-25 12:49 ` Nick Piggin
2004-10-25 13:51 ` Andrea Arcangeli
2004-10-25 20:09 ` Robert White
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