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From: Ingo Molnar <mingo@elte.hu>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Zachary Amsden <zach@vmware.com>,
	Jeremy Fitzhardinge <jeremy@xensource.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andi Kleen <ak@suse.de>
Subject: Re: [PATCH 6/8] Allow per-cpu variables to be page-aligned
Date: Tue, 6 Mar 2007 14:15:22 +0100	[thread overview]
Message-ID: <20070306131522.GC9031@elte.hu> (raw)
In-Reply-To: <1173186021.4644.38.camel@localhost.localdomain>


* Rusty Russell <rusty@rustcorp.com.au> wrote:

> Xen wants page-aligned GDT (and PDA must not cross a page-boundary, 
> but that doesn't happen at the moment since it's so close to start of 
> page).  Let's allow page-alignment in general for per-cpu data.
> 
> Because larger alignments can use more room, we increase the max 
> per-cpu memory to 64k rather than 32k: it's getting a little tight.

i recently needed page-aligned per-cpu data too for KVM-paravirt. Btw., 
what's the size increase of the native kernel?

Acked-by: Ingo Molnar <mingo@elte.hu>

	Ingo

  parent reply	other threads:[~2007-03-06 13:15 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-06 12:39 [PATCH 0/8] x86 boot, pda and gdt cleanups Rusty Russell
2007-03-06 12:53 ` [PATCH 1/8] Remove cpu_gdt_table: use boot_gdt_table until migration to per-cpu Rusty Russell
2007-03-06 12:54   ` [PATCH 2/8] Remove NR_CPUS from asm-generic/percpu.h Rusty Russell
2007-03-06 12:55     ` [PATCH 3/8] Use per-cpu variables for GDT, PDA Rusty Russell
2007-03-06 12:57       ` [PATCH 4/8] Cleanup setup_pda Rusty Russell
2007-03-06 12:58         ` [PATCH 5/8] Cleanup GDT access Rusty Russell
2007-03-06 13:00           ` [PATCH 6/8] Allow per-cpu variables to be page-aligned Rusty Russell
2007-03-06 13:01             ` [PATCH 7/8] Page-align the GDT Rusty Russell
2007-03-06 13:03               ` [PATCH 8/8] Convert PDA into the percpu section Rusty Russell
2007-03-06 13:10                 ` Ingo Molnar
2007-03-07  0:12                   ` Rusty Russell
2007-03-07  0:35                     ` Jeremy Fitzhardinge
2007-03-06 18:28                 ` Jeremy Fitzhardinge
2007-03-06 19:34                 ` Andi Kleen
2007-03-06 18:37                   ` Jeremy Fitzhardinge
2007-03-07  0:33                   ` Rusty Russell
2007-03-07 11:55                     ` Rusty Russell
2007-03-13 17:15                 ` Jeremy Fitzhardinge
2007-03-14  2:27                   ` Rusty Russell
2007-03-06 13:15             ` Ingo Molnar [this message]
2007-03-07  0:16               ` [PATCH 6/8] Allow per-cpu variables to be page-aligned Rusty Russell
2007-03-07  0:44                 ` H. Peter Anvin
2007-03-06 18:17             ` Jeremy Fitzhardinge
2007-03-07  0:29               ` Rusty Russell
2007-03-06 18:16           ` [PATCH 5/8] Cleanup GDT access Jeremy Fitzhardinge
2007-03-06 18:14       ` [PATCH 3/8] Use per-cpu variables for GDT, PDA Jeremy Fitzhardinge
2007-03-06 13:21     ` [PATCH 2/8] Remove NR_CPUS from asm-generic/percpu.h Ingo Molnar
2007-03-06 13:20   ` [PATCH 1/8] Remove cpu_gdt_table: use boot_gdt_table until migration to per-cpu Ingo Molnar
2007-03-06 13:26     ` Ingo Molnar
2007-03-07  0:22     ` Rusty Russell
2007-03-13 20:48 ` [PATCH 0/8] x86 boot, pda and gdt cleanups Jeremy Fitzhardinge
2007-03-14  2:25   ` Rusty Russell
2007-03-14  4:39     ` Jeremy Fitzhardinge
2007-03-14  6:54       ` Rusty Russell
2007-03-14 23:55   ` Rusty Russell
2007-03-15  1:57     ` Jeremy Fitzhardinge

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