* an iommufd selftest issue with 6.4-rc1
@ 2023-05-17 13:56 Baolu Lu
2023-05-17 14:02 ` Jason Gunthorpe
0 siblings, 1 reply; 3+ messages in thread
From: Baolu Lu @ 2023-05-17 13:56 UTC (permalink / raw)
To: Jason Gunthorpe; +Cc: iommu@lists.linux.dev, Kevin Tian, Yi Liu, Nicolin Chen
Hi Jason,
I compiled a 6.4-rc1 kernel and ran the iommufd selftest. The test hung,
and I had to break it with Ctrl+C. Is this a known issue, or there is
something wrong with my test setup?
Best regards,
baolu
PS: the test log:
TAP version 13
1..1
# selftests: iommu: iommufd
# TAP version 13
# 1..129
# # Starting 129 tests from 11 test cases.
# # RUN iommufd.simple_close ...
# # OK iommufd.simple_close
# ok 1 iommufd.simple_close
# # RUN iommufd.cmd_fail ...
# # OK iommufd.cmd_fail
# ok 2 iommufd.cmd_fail
# # RUN iommufd.cmd_length ...
# # OK iommufd.cmd_length
# ok 3 iommufd.cmd_length
# # RUN iommufd.cmd_ex_fail ...
# # OK iommufd.cmd_ex_fail
# ok 4 iommufd.cmd_ex_fail
# # RUN iommufd.global_options ...
# # OK iommufd.global_options
# ok 5 iommufd.global_options
# # RUN iommufd.simple_ioctls ...
# # OK iommufd.simple_ioctls
# ok 6 iommufd.simple_ioctls
# # RUN iommufd.unmap_cmd ...
# # OK iommufd.unmap_cmd
# ok 7 iommufd.unmap_cmd
# # RUN iommufd.map_cmd ...
# # OK iommufd.map_cmd
# ok 8 iommufd.map_cmd
# # RUN iommufd.info_cmd ...
# # OK iommufd.info_cmd
# ok 9 iommufd.info_cmd
# # RUN iommufd.set_iommu_cmd ...
# # OK iommufd.set_iommu_cmd
# ok 10 iommufd.set_iommu_cmd
# # RUN iommufd.vfio_ioas ...
# # OK iommufd.vfio_ioas
# ok 11 iommufd.vfio_ioas
# # RUN iommufd_ioas.no_domain.ioas_auto_destroy ...
# # OK iommufd_ioas.no_domain.ioas_auto_destroy
# ok 12 iommufd_ioas.no_domain.ioas_auto_destroy
# # RUN iommufd_ioas.no_domain.ioas_destroy ...
# # OK iommufd_ioas.no_domain.ioas_destroy
# ok 13 iommufd_ioas.no_domain.ioas_destroy
# # RUN iommufd_ioas.no_domain.hwpt_attach ...
# # hwpt_attach: Test terminated unexpectedly by signal 9
# # FAIL iommufd_ioas.no_domain.hwpt_attach
# not ok 14 iommufd_ioas.no_domain.hwpt_attach
# # RUN iommufd_ioas.no_domain.ioas_area_destroy ...
# # OK iommufd_ioas.no_domain.ioas_area_destroy
# ok 15 iommufd_ioas.no_domain.ioas_area_destroy
# # RUN iommufd_ioas.no_domain.ioas_area_auto_destroy ...
# # OK iommufd_ioas.no_domain.ioas_area_auto_destroy
# ok 16 iommufd_ioas.no_domain.ioas_area_auto_destroy
# # RUN iommufd_ioas.no_domain.area ...
# # OK iommufd_ioas.no_domain.area
# ok 17 iommufd_ioas.no_domain.area
# # RUN iommufd_ioas.no_domain.unmap_fully_contained_areas ...
# # OK iommufd_ioas.no_domain.unmap_fully_contained_areas
# ok 18 iommufd_ioas.no_domain.unmap_fully_contained_areas
# # RUN iommufd_ioas.no_domain.area_auto_iova ...
# # OK iommufd_ioas.no_domain.area_auto_iova
# ok 19 iommufd_ioas.no_domain.area_auto_iova
# # RUN iommufd_ioas.no_domain.area_allowed ...
# # OK iommufd_ioas.no_domain.area_allowed
# ok 20 iommufd_ioas.no_domain.area_allowed
# # RUN iommufd_ioas.no_domain.copy_area ...
# # OK iommufd_ioas.no_domain.copy_area
# ok 21 iommufd_ioas.no_domain.copy_area
# # RUN iommufd_ioas.no_domain.iova_ranges ...
# # OK iommufd_ioas.no_domain.iova_ranges
# ok 22 iommufd_ioas.no_domain.iova_ranges
# # RUN iommufd_ioas.no_domain.access_domain_destory ...
# # iommufd.c:611:access_domain_destory:Expected MAP_FAILED
(18446744073709551615) != buf (18446744073709551615)
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: an iommufd selftest issue with 6.4-rc1
2023-05-17 13:56 an iommufd selftest issue with 6.4-rc1 Baolu Lu
@ 2023-05-17 14:02 ` Jason Gunthorpe
2023-05-18 7:22 ` Baolu Lu
0 siblings, 1 reply; 3+ messages in thread
From: Jason Gunthorpe @ 2023-05-17 14:02 UTC (permalink / raw)
To: Baolu Lu; +Cc: iommu@lists.linux.dev, Kevin Tian, Yi Liu, Nicolin Chen
On Wed, May 17, 2023 at 09:56:47PM +0800, Baolu Lu wrote:
> Hi Jason,
>
> I compiled a 6.4-rc1 kernel and ran the iommufd selftest. The test hung,
> and I had to break it with Ctrl+C. Is this a known issue, or there is
> something wrong with my test setup?
There is an annoying bug in the test harness and it infinite loops for
some failure cases. That explains the hang
> # # RUN iommufd_ioas.no_domain.ioas_destroy ...
> # # OK iommufd_ioas.no_domain.ioas_destroy
> # ok 13 iommufd_ioas.no_domain.ioas_destroy
> # # RUN iommufd_ioas.no_domain.hwpt_attach ...
> # # hwpt_attach: Test terminated unexpectedly by signal 9
That seems bad
> # # FAIL iommufd_ioas.no_domain.hwpt_attach
> # not ok 14 iommufd_ioas.no_domain.hwpt_attach
> # # RUN iommufd_ioas.no_domain.ioas_area_destroy ...
> # # OK iommufd_ioas.no_domain.ioas_area_destroy
> # ok 15 iommufd_ioas.no_domain.ioas_area_destroy
> # # RUN iommufd_ioas.no_domain.ioas_area_auto_destroy ...
> # # OK iommufd_ioas.no_domain.ioas_area_auto_destroy
> # ok 16 iommufd_ioas.no_domain.ioas_area_auto_destroy
> # # RUN iommufd_ioas.no_domain.area ...
> # # OK iommufd_ioas.no_domain.area
> # ok 17 iommufd_ioas.no_domain.area
> # # RUN iommufd_ioas.no_domain.unmap_fully_contained_areas ...
> # # OK iommufd_ioas.no_domain.unmap_fully_contained_areas
> # ok 18 iommufd_ioas.no_domain.unmap_fully_contained_areas
> # # RUN iommufd_ioas.no_domain.area_auto_iova ...
> # # OK iommufd_ioas.no_domain.area_auto_iova
> # ok 19 iommufd_ioas.no_domain.area_auto_iova
> # # RUN iommufd_ioas.no_domain.area_allowed ...
> # # OK iommufd_ioas.no_domain.area_allowed
> # ok 20 iommufd_ioas.no_domain.area_allowed
> # # RUN iommufd_ioas.no_domain.copy_area ...
> # # OK iommufd_ioas.no_domain.copy_area
> # ok 21 iommufd_ioas.no_domain.copy_area
> # # RUN iommufd_ioas.no_domain.iova_ranges ...
> # # OK iommufd_ioas.no_domain.iova_ranges
> # ok 22 iommufd_ioas.no_domain.iova_ranges
> # # RUN iommufd_ioas.no_domain.access_domain_destory ...
> # # iommufd.c:611:access_domain_destory:Expected MAP_FAILED
> (18446744073709551615) != buf (18446744073709551615)
And you had a failed mmp, so probably missing THPs or something
I don't see any failures when I run it..
Jason
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: an iommufd selftest issue with 6.4-rc1
2023-05-17 14:02 ` Jason Gunthorpe
@ 2023-05-18 7:22 ` Baolu Lu
0 siblings, 0 replies; 3+ messages in thread
From: Baolu Lu @ 2023-05-18 7:22 UTC (permalink / raw)
To: Jason Gunthorpe
Cc: baolu.lu, iommu@lists.linux.dev, Kevin Tian, Yi Liu, Nicolin Chen
On 2023/5/17 22:02, Jason Gunthorpe wrote:
> On Wed, May 17, 2023 at 09:56:47PM +0800, Baolu Lu wrote:
>> Hi Jason,
>>
>> I compiled a 6.4-rc1 kernel and ran the iommufd selftest. The test hung,
>> and I had to break it with Ctrl+C. Is this a known issue, or there is
>> something wrong with my test setup?
>
> There is an annoying bug in the test harness and it infinite loops for
> some failure cases. That explains the hang
Get it, thank you!
>
>> # # RUN iommufd_ioas.no_domain.ioas_destroy ...
>> # # OK iommufd_ioas.no_domain.ioas_destroy
>> # ok 13 iommufd_ioas.no_domain.ioas_destroy
>> # # RUN iommufd_ioas.no_domain.hwpt_attach ...
>> # # hwpt_attach: Test terminated unexpectedly by signal 9
>
> That seems bad
I don't know yet, need some investigation.
>
>> # # FAIL iommufd_ioas.no_domain.hwpt_attach
>> # not ok 14 iommufd_ioas.no_domain.hwpt_attach
>> # # RUN iommufd_ioas.no_domain.ioas_area_destroy ...
>> # # OK iommufd_ioas.no_domain.ioas_area_destroy
>> # ok 15 iommufd_ioas.no_domain.ioas_area_destroy
>> # # RUN iommufd_ioas.no_domain.ioas_area_auto_destroy ...
>> # # OK iommufd_ioas.no_domain.ioas_area_auto_destroy
>> # ok 16 iommufd_ioas.no_domain.ioas_area_auto_destroy
>> # # RUN iommufd_ioas.no_domain.area ...
>> # # OK iommufd_ioas.no_domain.area
>> # ok 17 iommufd_ioas.no_domain.area
>> # # RUN iommufd_ioas.no_domain.unmap_fully_contained_areas ...
>> # # OK iommufd_ioas.no_domain.unmap_fully_contained_areas
>> # ok 18 iommufd_ioas.no_domain.unmap_fully_contained_areas
>> # # RUN iommufd_ioas.no_domain.area_auto_iova ...
>> # # OK iommufd_ioas.no_domain.area_auto_iova
>> # ok 19 iommufd_ioas.no_domain.area_auto_iova
>> # # RUN iommufd_ioas.no_domain.area_allowed ...
>> # # OK iommufd_ioas.no_domain.area_allowed
>> # ok 20 iommufd_ioas.no_domain.area_allowed
>> # # RUN iommufd_ioas.no_domain.copy_area ...
>> # # OK iommufd_ioas.no_domain.copy_area
>> # ok 21 iommufd_ioas.no_domain.copy_area
>> # # RUN iommufd_ioas.no_domain.iova_ranges ...
>> # # OK iommufd_ioas.no_domain.iova_ranges
>> # ok 22 iommufd_ioas.no_domain.iova_ranges
>> # # RUN iommufd_ioas.no_domain.access_domain_destory ...
>> # # iommufd.c:611:access_domain_destory:Expected MAP_FAILED
>> (18446744073709551615) != buf (18446744073709551615)
>
> And you had a failed mmp, so probably missing THPs or something
Seems to look good.
# grep THP .config
CONFIG_ARCH_ENABLE_THP_MIGRATION=y
CONFIG_ARCH_WANTS_THP_SWAP=y
CONFIG_THP_SWAP=y
# CONFIG_READ_ONLY_THP_FOR_FS is not set
# cat /sys/kernel/mm/transparent_hugepage/enabled
[always] madvise never
> I don't see any failures when I run it..
Okay, that's fine.
Best regards,
baolu
^ permalink raw reply [flat|nested] 3+ messages in thread
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