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Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table
From: |
Laszlo Ersek |
Subject: |
Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table |
Date: |
Thu, 09 Jan 2014 21:33:05 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20131118 Thunderbird/17.0.11 |
On 01/09/14 20:12, Eduardo Habkost wrote:
> The original SeaBIOS code used the RamSize variable, that was used by
> SeaBIOS for the size of RAM below 4GB, not for all RAM. When copied to
> QEMU, the code was changed to use the full RAM size, and this broke the
> build_srat() code that handles the PCI hole.
>
> This series fixes the problem by restoring the original behavior from SeaBIOS.
>
> Example Linux guest dmesg output when the bug is present (using -m 4G and 4
> 1GB
> NUMA nodes):
> SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
> SRAT: Node 0 PXM 0 [mem 0x00100000-0x3fffffff]
> SRAT: Node 1 PXM 1 [mem 0x40000000-0x7fffffff]
> SRAT: Node 2 PXM 2 [mem 0x80000000-0xbfffffff]
> SRAT: Node 3 PXM 3 [mem 0xc0000000-0xffffffff]
> NUMA: nodes only cover 3583MB of your 4095MB e820 RAM. Not used.
> Output after the series is applied:
>
> SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
> SRAT: Node 0 PXM 0 [mem 0x00100000-0x3fffffff]
> SRAT: Node 1 PXM 1 [mem 0x40000000-0x7fffffff]
> SRAT: Node 2 PXM 2 [mem 0x80000000-0xbfffffff]
> SRAT: Node 3 PXM 3 [mem 0xc0000000-0xdfffffff]
> SRAT: Node 3 PXM 3 [mem 0x100000000-0x11fffffff]
>
>
> Eduardo Habkost (2):
> pc: Save size of RAM below 4GB
> acpi-build: Fix PCI hole handling on build_srat()
>
> hw/i386/acpi-build.c | 10 +++++-----
> hw/i386/pc.c | 1 +
> include/hw/i386/pc.h | 2 +-
> 3 files changed, 7 insertions(+), 6 deletions(-)
>
It looks sane to me (which might not mean much of course).
series
Reviewed-by: Laszlo Ersek <address@hidden>
- [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table, Eduardo Habkost, 2014/01/09
- [Qemu-devel] [PATCH 1/2] pc: Save size of RAM below 4GB, Eduardo Habkost, 2014/01/09
- [Qemu-devel] [PATCH 2/2] acpi: Fix PCI hole handling on build_srat(), Eduardo Habkost, 2014/01/09
- Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table,
Laszlo Ersek <=
- Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table, Igor Mammedov, 2014/01/10
- Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table, Gerd Hoffmann, 2014/01/13
- Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table, Eduardo Habkost, 2014/01/24
- Re: [Qemu-devel] [PATCH 0/2] acpi: Fix PCI hole handling on SRAT table, Michael S. Tsirkin, 2014/01/26