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virtio_mem_hugetlb_migration: adds new test case #4126

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merged 1 commit into from
Sep 20, 2024
Merged

virtio_mem_hugetlb_migration: adds new test case #4126

merged 1 commit into from
Sep 20, 2024

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mcasquer
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@mcasquer mcasquer commented Aug 2, 2024

virtio_mem_hugetlb_migration: adds new test case

Creates a new test case for performing a live migration
of a VM with a virtio-mem device that consumes hugepages

Signed-off-by: mcasquer [email protected]
ID: 2653

@mcasquer mcasquer force-pushed the 2653_hugetlb_virtio_mem branch 2 times, most recently from 1cfde10 to 06b98b2 Compare August 2, 2024 09:19
@mcasquer mcasquer marked this pull request as ready for review August 2, 2024 09:31
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mcasquer commented Aug 2, 2024 

 (1/1) Host_RHEL.m9.u5.ovmf.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.9.5.0.x86_64.io-github-autotest-qemu.virtio_mem_hugetlb_migration.q35: STARTED
 (1/1) Host_RHEL.m9.u5.ovmf.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.9.5.0.x86_64.io-github-autotest-qemu.virtio_mem_hugetlb_migration.q35: PASS (113.00 s)
RESULTS    : PASS 1 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0

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mcasquer commented Aug 2, 2024 •
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@zhenyzha @MiriamDeng @PaulYuuu @yanan-fu could you review this PR? Thanks !

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mcasquer commented Aug 2, 2024

@menli820 do you consider this test case could be executed in windows too?

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menli820 commented Aug 5, 2024

@menli820 do you consider this test case could be executed in windows too?

@mcasquer Thanks for the reminder.
Not currently as windows side not support migration well from the developer.

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zhenyzha commented Aug 6, 2024

virtio_mem_hugetlb_migration.arm64-pci: PASS (116.79 s)

LGTM.Acked-by: Zhenyu Zhang [email protected]

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@PaulYuuu @yanan-fu this is a kindly reminder, please could you review this PR? Thanks !

PaulYuuu
PaulYuuu reviewed Aug 13, 2024
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Others LGTM.

qemu/tests/cfg/virtio_mem_hugetlb_migration.cfg Outdated Show resolved Hide resolved
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@yanan-fu this is a kindly reminder, could you please review this PR? Thanks !

yanan-fu
yanan-fu reviewed Aug 19, 2024
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qemu/tests/virtio_mem_hugetlb_migration.py Outdated
requested_size_vmem = params.get("requested-size_test_%s" % mem_object_id)
device_id = "virtio_mem-%s" % mem_object_id
node_id = params.get_numeric("node_memory_%s" % mem_object_id)
process.system("echo %d > /proc/sys/vm/nr_hugepages" % mem, shell=True)
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With setup_hugepage=yes in cfg, env_process will setup hugepage based on some logic, checking hugepage size and setup the target hugepages.
Logically, i think it is conflict with the setting in the test case level.

And, nr_hugepages is the page number, i did not see any checking about the page size.

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@mcasquer mcasquer Aug 19, 2024 •
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@yanan-fu
I get that using nr_hugepages doesn't keep in mind the hugepages size, so likely that needs to be changed, but then how could be handled the self migraton of a VM using hugepages? AFAIU setup_hugepages only does it for the source VM, right? I need the double of those hugepages if we think on the destination too...

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Actually, setup_hugepage is about the action in host env, both src and dst vm can use the hugepage path.

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@yanan-fu could you review again this PR? Thanks !

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Compare this case with case virtio_mem_numa_basic.with_migration, The difference is use one virtio_mem instead of two and use memory-backend-file instead of memory-backend-rom, it can be controlled easily with configuration IMO.

and migrate with hugepage, add hugepage setup before launch vm.

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Compare this case with case virtio_mem_numa_basic.with_migration, The difference is use one virtio_mem instead of two and use memory-backend-file instead of memory-backend-rom, it can be controlled easily with configuration IMO.

and migrate with hugepage, add hugepage setup before launch vm.

@yanan-fu it's correct, I thought only using setup_hugepages with reserve=false and prealloc=true won't be sufficient

@mcasquer mcasquer force-pushed the 2653_hugetlb_virtio_mem branch 2 times, most recently from d54c1fc to 2c90c4b Compare August 26, 2024 07:20
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 (1/1) Host_RHEL.m9.u5.ovmf.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.9.5.0.x86_64.io-github-autotest-qemu.virtio_mem_hugetlb_migration.q35: STARTED
 (1/1) Host_RHEL.m9.u5.ovmf.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.9.5.0.x86_64.io-github-autotest-qemu.virtio_mem_hugetlb_migration.q35: PASS (162.08 s)
RESULTS    : PASS 1 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0

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This is a kindly reminder, @yanan-fu please could you review again this PR? Thanks !

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Hi again @yanan-fu this is a kindly reminder, please could you review this PR? Thanks !

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Do we need to cover the negative scenario:

If the virtio-mem device is resized to a higher value, a warning message is displayed.
(qemu) qemu-kvm: warning: qemu_prealloc_mem: preallocating memory failed: Bad address

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mcasquer commented Sep 10, 2024 •
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Do we need to cover the negative scenario:

If the virtio-mem device is resized to a higher value, a warning message is displayed.
(qemu) qemu-kvm: warning: qemu_prealloc_mem: preallocating memory failed: Bad address

@yanan-fu How exactly do you reproduce that scenario? In this case if you resize the virtio-mem device to a higher value it should be:

(qemu) qom-set virtio_mem-vmem0 requested-size 9G
Error: 'requested-size' cannot exceed the memory backend size(0x200000000)

Which is the expected output (but it is not covered 😅 )

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Do we need to cover the negative scenario:

If the virtio-mem device is resized to a higher value, a warning message is displayed.
(qemu) qemu-kvm: warning: qemu_prealloc_mem: preallocating memory failed: Bad address

@yanan-fu How exactly do you reproduce that scenario? In this case if you resize the virtio-mem device to a higher value it should be:

(qemu) qom-set virtio_mem-vmem0 requested-size 9G
Error: 'requested-size' cannot exceed the memory backend size(0x200000000)

Which is the expected output (but it is not covered 😅 )

It is not about reproduce the issue, i means do we need to cover this negative scenario in this test (as it is mentioned in the manual test case) ?

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Do we need to cover the negative scenario:

If the virtio-mem device is resized to a higher value, a warning message is displayed.
(qemu) qemu-kvm: warning: qemu_prealloc_mem: preallocating memory failed: Bad address

@yanan-fu How exactly do you reproduce that scenario? In this case if you resize the virtio-mem device to a higher value it should be:

(qemu) qom-set virtio_mem-vmem0 requested-size 9G
Error: 'requested-size' cannot exceed the memory backend size(0x200000000)

Which is the expected output (but it is not covered 😅 )

It is not about reproduce the issue, i means do we need to cover this negative scenario in this test (as it is mentioned in the manual test case) ?

@yanan-fu got it, yes I think it's interesting, I will send an update

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It is not about reproduce the issue, i means do we need to cover this negative scenario in this test (as it is mentioned in the manual test case) ?

@yanan-fu included !

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 (1/1) Host_RHEL.m9.u5.ovmf.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.9.5.0.x86_64.io-github-autotest-qemu.virtio_mem_hugetlb_migration.q35: STARTED
 (1/1) Host_RHEL.m9.u5.ovmf.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.9.5.0.x86_64.io-github-autotest-qemu.virtio_mem_hugetlb_migration.q35: PASS (165.20 s)
RESULTS    : PASS 1 | ERROR 0 | FAIL 0 | SKIP 0 | WARN 0 | INTERRUPT 0 | CANCEL 0

yanan-fu
yanan-fu approved these changes Sep 18, 2024
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Ack

@mcasquer
virtio_mem_hugetlb_migration: adds new test case
e9ca883 
Creates a new test case for performing a live migration
of a VM with a virtio-mem device that consumes hugepages

Signed-off-by: mcasquer <[email protected]>
@mcasquer
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Hello, at this point could this PR be merged? Thanks!

@yanan-fu yanan-fu merged commit cf84766 into autotest:master Sep 20, 2024
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@zhenyzha zhenyzha zhenyzha approved these changes

@yanan-fu yanan-fu yanan-fu approved these changes

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@mcasquer @menli820 @zhenyzha @yanan-fu @PaulYuuu