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Re: [Qemu-devel] [PATCH v4 2/2] ACPI/unit-test: Add a new testcase for R


From: Dou Liyang
Subject: Re: [Qemu-devel] [PATCH v4 2/2] ACPI/unit-test: Add a new testcase for RAM allocation in numa node
Date: Thu, 24 Aug 2017 09:30:10 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

Hi Eduardo,

At 08/24/2017 01:25 AM, Eduardo Habkost wrote:
On Wed, Aug 23, 2017 at 09:35:29PM +0800, Dou Liyang wrote:
Hi Igor,

At 08/23/2017 08:45 PM, Igor Mammedov wrote:
On Wed, 23 Aug 2017 20:12:51 +0800
Dou Liyang <address@hidden> wrote:

Hi Igor,

At 08/23/2017 04:40 PM, Igor Mammedov wrote:
On Tue, 22 Aug 2017 11:24:10 +0800
Dou Liyang <address@hidden> wrote:

As QEMU supports the memory-less node, it is possible that there is
no RAM in the first numa node(also be called as node0). eg:
  ... \
  -m 128,slots=3,maxmem=1G \
  -numa node -numa node,mem=128M \

But, this makes it hard for QEMU to build a known-to-work ACPI SRAT
table. Only fixing it is not enough.

Add a testcase for this situation to make sure the ACPI table is
correct for guest.

Suggested-by: Eduardo Habkost <address@hidden>
Signed-off-by: Dou Liyang <address@hidden>
---
 tests/acpi-test-data/pc/DSDT.numamem  | Bin 0 -> 6463 bytes
 tests/acpi-test-data/pc/SLIT.numamem  | Bin 0 -> 48 bytes
 tests/acpi-test-data/pc/SRAT.numamem  | Bin 0 -> 264 bytes
 tests/acpi-test-data/q35/DSDT.numamem | Bin 0 -> 9147 bytes
 tests/acpi-test-data/q35/SLIT.numamem | Bin 0 -> 48 bytes
 tests/acpi-test-data/q35/SRAT.numamem | Bin 0 -> 264 bytes
 tests/bios-tables-test.c              |  30 ++++++++++++++++++++++++++++++
 7 files changed, 30 insertions(+)
 create mode 100644 tests/acpi-test-data/pc/DSDT.numamem
 create mode 100644 tests/acpi-test-data/pc/SLIT.numamem
 create mode 100644 tests/acpi-test-data/pc/SRAT.numamem
 create mode 100644 tests/acpi-test-data/q35/DSDT.numamem
 create mode 100644 tests/acpi-test-data/q35/SLIT.numamem
 create mode 100644 tests/acpi-test-data/q35/SRAT.numamem


considering only SRAT table has been changed and the other
tables match with default blobs, I'd suggest to keep only


Our testcase is:

+    test_acpi_one(" -m 128,slots=3,maxmem=1G"
+                  " -numa node -numa node,mem=128"
+                  " -numa dist,src=0,dst=1,val=21",
+                  &data);

The DSDT and SLIT don't match with default blobs.
do you actually need SLIT table /i.e. -numa dist/ for test at all?
it looks not relevant for the test case at the hand,
I'd suggest to drop '-numa dist' option for the test.


OK, Got it, will drop '-numa dist' option in next version.


So, they can't be dropped.

I wonder what's changed, could you post DSDT diff here?


Just like memory hot-plug cases, when we use the '-m
128,slots=3,maxmem=1G' option, As the ACPI spec said, There may be some
Memory Device in the DSDT table.

Do you really need to use -m 128,slots=3,maxmem=1G to test your
bug fix?


I was wrong, As the default memory for x86 is 128Mb, I will remove this option to make one case just do one thing.

Thanks,
        dou.





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