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 1/8] Remove cpu_gdt_table: use boot_gdt_table until migration to per-cpu
Date: Tue, 6 Mar 2007 14:26:13 +0100 [thread overview]
Message-ID: <20070306132613.GA12964@elte.hu> (raw)
In-Reply-To: <20070306132004.GD9031@elte.hu>
* Ingo Molnar <mingo@elte.hu> wrote:
> > + .quad 0x00cf9a000000ffff /* boot: 4GB code at 0x00000000 */
> > + .quad 0x00cf92000000ffff /* boot: 4GB data at 0x00000000 */
> > .quad 0x0000000000000000 /* 0x20 unused */
> > .quad 0x0000000000000000 /* 0x28 unused */
> > .quad 0x0000000000000000 /* 0x33 TLS entry 1 */
>
> actually, the reason for the small boot GDT was that some systems
> wouldnt even boot with a larger GDT. (there was some BIOS interaction,
> forgot what it was - iirc it was mach-visws and also some other older
> box)
>
> the 'simplification' you do here is actually how Linux worked before
> it was fixed for those systems.
>
> so i'd be quite nervous to touch this area of the GDT code. (I'd
> support a renaming though, gdt_table is indeed ugly.)
and this seems to have a ripple effect on the rest of your GDT changes -
i'll wait for this to be cleared before doing a line by line review of
them. I commented on the mostly-unaffected ones already.
Ingo
next prev parent reply other threads:[~2007-03-06 13:27 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 ` [PATCH 6/8] Allow per-cpu variables to be page-aligned Ingo Molnar
2007-03-07 0:16 ` 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 [this message]
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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