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Re: [PATCH] Fix alignment of early reservation for EBDA

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From: H. Peter Anvin <hpa@...>
To: Alexander van Heukelum <heukelum@...>
Cc: Andi Kleen <ak@...>, Ingo Molnar <mingo@...>, Thomas Gleixner <tglx@...>, LKML <linux-kernel@...>, Alexander van Heukelum <heukelum@...>
Subject: Re: [PATCH] Fix alignment of early reservation for EBDA
Date: Sunday, February 24, 2008 - 10:18 pm

Alexander van Heukelum wrote:

It is, but that rounding gets done in reserve_bootmem() anyway, so there 
is no need for the arch-specific code to do it.

The 32-bit EBDA code hard-codes a size of 4K, which is probably equally 
wrong; my gut feel is that the right thing to do is to reserve from the 
EBDA up to the 640K mark (some BIOSes use an area like that for SMM 
stuff), possibly with some sanity checking.

	-hpa
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Messages in current thread:
[PATCH] Fix alignment of early reservation for EBDA, Alexander van Heukelum, (Sun Feb 24, 1:46 pm)
Re: [PATCH] Fix alignment of early reservation for EBDA, H. Peter Anvin, (Sun Feb 24, 10:18 pm)
Re: [PATCH] Fix alignment of early reservation for EBDA, Alexander van Heukelum, (Mon Feb 25, 12:54 pm)
Re: [PATCH] Fix alignment of early reservation for EBDA, Andi Kleen, (Wed Feb 27, 10:25 am)
Re: [PATCH] Fix alignment of early reservation for EBDA, Ingo Molnar, (Mon Feb 25, 1:01 pm)
[PATCH] reserve_early end-of-conventional-memory to 1MB, Alexander van Heukelum, (Mon Feb 25, 2:07 pm)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB, H. Peter Anvin, (Mon Feb 25, 2:13 pm)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB, Alexander van Heukelum, (Mon Feb 25, 3:46 pm)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB, H. Peter Anvin, (Mon Feb 25, 5:17 pm)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB, Ingo Molnar, (Tue Feb 26, 5:30 am)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB ..., Andi Kleen, (Wed Feb 27, 10:38 am)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB ..., H. Peter Anvin, (Wed Feb 27, 12:44 pm)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB ..., Alexander van Heukelum, (Wed Feb 27, 4:01 pm)
Re: [PATCH] reserve_early end-of-conventional-memory to 1MB, Andi Kleen, (Wed Feb 27, 10:26 am)
[PATCH] reserve end-of-conventional-memory to 1MB on 32-bit, Alexander van Heukelum, (Thu Feb 28, 9:13 am)
[RFC] use realmode code to reserve end-of-conventional-memor..., Alexander van Heukelum, (Thu Feb 28, 9:28 am)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ian Campbell, (Thu Feb 28, 5:12 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., H. Peter Anvin, (Thu Feb 28, 5:14 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ian Campbell, (Thu Feb 28, 7:16 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Jeremy Fitzhardinge, (Tue Mar 4, 1:44 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Eduardo Habkost, (Wed Mar 5, 11:59 am)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Jeremy Fitzhardinge, (Wed Mar 5, 12:38 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., H. Peter Anvin, (Wed Mar 5, 1:27 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., H. Peter Anvin, (Wed Mar 5, 12:08 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Eduardo Habkost, (Wed Mar 5, 12:53 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., H. Peter Anvin, (Wed Mar 5, 1:28 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Jeremy Fitzhardinge, (Wed Mar 5, 1:28 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., H. Peter Anvin, (Wed Mar 5, 1:38 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ingo Molnar, (Fri Feb 29, 4:00 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Mark McLoughlin, (Tue Mar 4, 7:41 am)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ingo Molnar, (Tue Mar 4, 10:33 am)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Jeremy Fitzhardinge, (Tue Mar 4, 11:13 am)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ingo Molnar, (Tue Mar 4, 11:25 am)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Jeremy Fitzhardinge, (Tue Mar 4, 12:02 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ingo Molnar, (Tue Mar 4, 12:15 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Mark McLoughlin, (Tue Mar 4, 12:15 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ingo Molnar, (Tue Mar 4, 12:23 pm)
Re: [RFC] use realmode code to reserve end-of-conventional-m..., Ian Campbell, (Tue Mar 4, 11:12 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Ian Campbell, (Thu Feb 28, 5:09 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Fri Feb 29, 7:49 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Mark McLoughlin, (Fri Feb 29, 1:14 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Fri Feb 29, 2:38 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., H. Peter Anvin, (Fri Feb 29, 2:44 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Fri Feb 29, 2:56 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Mark McLoughlin, (Fri Feb 29, 6:06 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Sat Mar 1, 12:09 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 64-..., Alexander van Heukelum, (Sat Mar 1, 12:12 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Mark McLoughlin, (Tue Mar 4, 7:44 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Jeremy Fitzhardinge, (Tue Mar 4, 11:18 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Tue Mar 4, 12:51 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Jeremy Fitzhardinge, (Tue Mar 4, 1:11 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB, 32-bi..., Alexander van Heukelum, (Tue Mar 4, 2:57 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB, 64-bi..., Alexander van Heukelum, (Tue Mar 4, 3:12 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., H. Peter Anvin, (Tue Mar 4, 1:05 pm)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Ingo Molnar, (Tue Mar 4, 10:49 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Mark McLoughlin, (Tue Mar 4, 11:16 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Ingo Molnar, (Tue Mar 4, 11:24 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Tue Mar 4, 9:31 am)
Re: [PATCH] reserve end-of-conventional-memory to 1MB on 32-..., Alexander van Heukelum, (Fri Feb 29, 6:26 pm)
Re: [PATCH] Fix alignment of early reservation for EBDA, Andi Kleen, (Sun Feb 24, 3:27 pm)
Re: [PATCH] Fix alignment of early reservation for EBDA, Ingo Molnar, (Sun Feb 24, 3:41 pm)
Re: [PATCH] Fix alignment of early reservation for EBDA, Alexander van Heukelum, (Sun Feb 24, 4:53 pm)