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From: "David S. Miller" <davem@davemloft.net>
To: dada1@cosmosbay.com
Cc: bcrl@kvack.org, akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: Questions about alloc_large_system_hash() and TLB entries
Date: Mon, 30 Jan 2006 01:22:59 -0800 (PST)	[thread overview]
Message-ID: <20060130.012259.78361400.davem@davemloft.net> (raw)
In-Reply-To: <43DDD66C.4060201@cosmosbay.com>

From: Eric Dumazet <dada1@cosmosbay.com>
Date: Mon, 30 Jan 2006 10:03:40 +0100

> What would be the needed changes in the code to get both :
> 
>    - Allocate ram equally from all the nodes of the machine
> 
>    - Use large pages (2MB) to lower TLB stress

These two desires are mutually exclusive, I think.

If you want an 8MB hash table, for example, with 2MB mappings
you could use memory from a maximum of 4 nodes since the
2MB chunks have to be physically 2MB aligned and 2MB contiguous.

  reply	other threads:[~2006-01-30  9:23 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-29  6:26 [PATCH] i386: Add a temporary to make put_user more type safe Eric W. Biederman
2006-01-29  6:39 ` Andrew Morton
2006-01-29  6:49   ` Eric W. Biederman
2006-01-29  7:51     ` Andrew Morton
     [not found]       ` <200601291620.28291.ioe-lkml@rameria.de>
2006-01-29 19:33         ` Andrew Morton
2006-01-29 20:04           ` [PATCH] i386: instead of poisoning .init zone, change protection bits to force a fault Eric Dumazet
2006-01-29 20:05             ` Benjamin LaHaise
2006-01-29 20:28               ` Eric Dumazet
2006-01-29 20:56               ` [PATCH, V2] " Eric Dumazet
2006-01-30  9:03                 ` Questions about alloc_large_system_hash() and TLB entries Eric Dumazet
2006-01-30  9:22                   ` David S. Miller [this message]
2006-01-30 10:22                     ` Eric Dumazet
2006-02-04 22:41                 ` [PATCH, V2] i386: instead of poisoning .init zone, change protection bits to force a fault Andrew Morton
2006-02-05 17:03                   ` Eric Dumazet
2006-02-05 19:42                     ` Andrew Morton
2006-02-06  8:53                       ` Eric Dumazet
2006-02-06  9:02                   ` Eric Dumazet
2006-02-06  9:28                     ` Andrew Morton
2006-02-06 10:07                       ` Eric Dumazet
2006-02-06 10:16                         ` Andrew Morton

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