From: Andi Kleen <ak@suse.de>
To: Paul Mackerras <paulus@samba.org>
Cc: Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@suse.de>,
davem@davemloft.net, dwmw2@infradead.org,
linux-arch@vger.kernel.org
Subject: Re: TASK_SIZE is variable.
Date: Fri, 28 Jan 2005 07:39:08 +0100 [thread overview]
Message-ID: <20050128063908.GA3195@wotan.suse.de> (raw)
In-Reply-To: <16889.43580.716149.901314@cargo.ozlabs.ibm.com>
On Fri, Jan 28, 2005 at 01:58:04PM +1100, Paul Mackerras wrote:
> Here is a patch that I did recently to reduce the overhead of
> clear_page_tables() when using 64k pages on ppc64. It keeps a record
> of the maximum address that has been used in each mm_struct. With
> this we can kill MM_VM_SIZE.
>
> Andrew - could this go in -mm perhaps?
How does this work? The stack is always at the top of address space
and it will never change anything.
Or did you do this only to optimize 32bit processes on 64bit kernels?
If yes then the test in TASK_SIZE or MM_VM_SIZE should take care of it
anyways.
-Andi
next prev parent reply other threads:[~2005-01-28 6:39 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-25 22:26 TASK_SIZE is variable David Woodhouse
2005-01-25 23:52 ` David S. Miller
2005-01-26 6:36 ` Andi Kleen
2005-01-26 6:41 ` David S. Miller
2005-01-26 7:13 ` Andi Kleen
2005-01-26 7:24 ` Andrew Morton
2005-01-26 7:43 ` Andi Kleen
2005-01-26 8:01 ` Andrew Morton
2005-01-26 8:04 ` Andi Kleen
2005-01-28 2:58 ` Paul Mackerras
2005-01-28 3:11 ` Paul Mackerras
2005-01-28 3:17 ` Andrew Morton
2005-01-28 6:40 ` Andi Kleen
2005-01-29 11:23 ` Anton Blanchard
2005-01-28 8:46 ` Russell King
2005-01-28 6:39 ` Andi Kleen [this message]
2005-01-28 11:32 ` David Woodhouse
2005-01-26 7:54 ` David Woodhouse
2005-01-29 20:23 ` Andrew Morton
2005-01-29 23:28 ` Paul Mackerras
2005-01-30 11:01 ` Andi Kleen
2005-01-30 12:10 ` Paul Mackerras
2005-01-31 2:23 ` David S. Miller
2005-01-31 9:23 ` Andi Kleen
2005-01-31 19:29 ` David S. Miller
2005-01-31 19:38 ` Andi Kleen
2005-01-31 20:35 ` David S. Miller
2005-02-03 4:08 ` Andrew Morton
2005-02-03 6:28 ` David S. Miller
2005-02-03 7:19 ` Andi Kleen
2005-02-03 9:23 ` David Woodhouse
2005-01-31 2:33 ` Matthew Wilcox
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