Re: [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.

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Subject: Re: [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.
From: Dave Hansen <dave.hansen@xxxxxxxxx>
Date: Fri, 22 Mar 2024 10:43:36 -0700
Cc: Steve Wahl <steve.wahl@xxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, x86@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Linux regressions mailing list <regressions@xxxxxxxxxxxxxxx>, Pavin Joseph <me@xxxxxxxxxxxxxxx>, stable@xxxxxxxxxxxxxxx, Eric Hagberg <ehagberg@xxxxxxxxx>, Simon Horman <horms@xxxxxxxxxxxx>, Dave Young <dyoung@xxxxxxxxxx>, Sarah Brofeldt <srhb@xxxxxx>, Russ Anderson <rja@xxxxxxx>, Dimitri Sivanich <sivanich@xxxxxxx>
In-reply-to: <2f8d726a-9800-4068-9c0c-6c4a79d69a85@intel.com>
User-agent: Mozilla Thunderbird

On 3/22/24 10:40, Dave Hansen wrote:
>  * Mapping extra memory on UV systems causes halts[1]
>  * Mapping extra memory on UV systems breaks kexec (this thread)

Sorry, I said that second one backwards:

 * _Not_ mapping extra memory on UV systems breaks kexec

Follow-Ups:
- Re: [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.
  - From: Steve Wahl

References:
- [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.
  - From: Steve Wahl
- Re: [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.
  - From: Dave Hansen
- Re: [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.
  - From: Eric W. Biederman
- Re: [PATCH] x86/mm/ident_map: Use full gbpages in identity maps except on UV platform.
  - From: Dave Hansen

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