Re: [OE-core][scarthgap] linux-yocto/6.6: update to v6.6.157

["Yoann Congal" <yoann.congal@smile.fr>]

On Mon Oct 19, 2026 at 5:16 PM CEST, Yoann Congal wrote:
> On Mon Oct 19, 2026 at 4:43 PM CEST, Bruce Ashfield wrote:
>> On Thu, Oct 15, 2026 at 3:05 AM Yoann Congal <yoann.congal@smile.fr> wrote:
>>
>>> On Wed Oct 14, 2026 at 6:55 PM CEST, Bruce Ashfield wrote:
>>> > On Wed, Oct 14, 2026 at 10:31 AM Yoann Congal <yoann.congal@smile.fr>
>>> wrote:
>>> >
>>> >> On Tue Sep 22, 2026 at 10:08 AM CEST, Yoann Congal wrote:
>>> >> > On Thu Sep 17, 2026 at 7:16 AM CEST, Bruce Ashfield via
>>> >> lists.openembedded.org wrote:
>>> >> >> From: Bruce Ashfield <bruce.ashfield@gmail.com>
>>> >> >>
>>> >> >> Updating linux-yocto/6.6 to the latest korg -stable release that
>>> >> comprises
>>> >> >> the following commits:
>>> >> >>
>>> >> >>     79643295eba17 Linux 6.6.157
>>> >> >>     32e598324edc3 nvmet-rdma: fix queue leak when connect backlog is
>>> >> exceeded
>>> >> >>     [...]
>>> >> >>     73b7a11814838 Revert "arm64: mm: Don't remap pgtables for
>>> allocate
>>> >> vs populate"
>>> >> >>
>>> >> >> Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
>>> >> >> ---
>>> >> >>  .../linux/linux-yocto-rt_6.6.bb               |  6 ++--
>>> >> >>  .../linux/linux-yocto-tiny_6.6.bb             |  6 ++--
>>> >> >>  meta/recipes-kernel/linux/linux-yocto_6.6.bb  | 28
>>> +++++++++----------
>>> >> >>  3 files changed, 20 insertions(+), 20 deletions(-)
>>> >> >
>>> >> > Hello Bruce,
>>> >> >
>>> >> > I think either this 6.6.157 upgrade or the 6.6.156 one triggers a
>>> >> > lttng ptest failure:
>>> >> >
>>> https://autobuilder.yoctoproject.org/valkyrie/?#/builders/73/builds/4604
>>> >> > qemux86-64-ptest debian11-vk-3 scarthgap completed at 2026-09-21
>>> >> 11:38:31+00:00
>>> >> >
>>> https://autobuilder.yoctoproject.org/valkyrie/?#/builders/61/builds/4577
>>> >> > qemuarm64-ptest ubuntu2404-vk-arm2 scarthgap completed at 2026-09-21
>>> >> 14:57:16+00:00
>>> >> >
>>> >> >
>>> >>
>>> https://valkyrie.yocto.io/pub/non-release/20260921-71/testresults/qemux86-64-ptest/core-image-ptest-lttng-tools/log.do_testimage.311077.20260921110838
>>> >> :
>>> >> > (only one of each message):
>>> >> > |FAIL: kernel/test_userspace_probe 91 - Load command with opts:
>>> >>
>>> --input-path=/tmp/tmp.test_userspace_probe_save_load_elf_trace_path.zSA9mh
>>> >> > |FAIL: tools/base-path/test_ust 35 - Load command with opts: -i
>>> >> ./tools/base-path//load-stream-extra-path.lttng
>>> >> > |FAIL: tools/save-load/test_load 2 - Load command with opts: -i
>>> >> ./tools/save-load//load-42.lttng
>>> >> > |FAIL: tools/rotation/test_ust 101 - App is un-registered
>>> >> > |FAIL: tools/save-load/test_autoload 2 - Lttng-tool list command with
>>> >> option load-42
>>> >> > |FAIL: tools/rotation/test_save_load_mi 17 - Lttng-tool list command
>>> >> with option yTVkM2lxbFoDS7Nu
>>> >> > |FAIL: tools/rotation/test_save_load_mi 8 - Valid lttng
>>> enable-rotation
>>> >> size XML
>>> >> > |FAIL: tools/rotation/test_save_load_mi 5 - Valid lttng
>>> enable-rotation
>>> >> timer XML
>>> >> > |FAIL: tools/relayd-grouping/test_ust 120 - Valid lttng list XML
>>> >> > |FAIL: tools/rotation/test_save_load_mi 18 - Valid lttng list XML
>>> after
>>> >> load
>>> >> > |FAIL: tools/base-path/test_ust 37 - Stop lttng tracing for session
>>> >> load-stream-extra-path
>>> >> > |FAIL: tools/trigger/test_add_trigger_cli 293 - add-trigger mi is
>>> valid
>>> >> > |FAIL: tools/trigger/test_remove_trigger_cli 20 - remove-trigger mi is
>>> >> valid
>>> >> > |FAIL: tools/base-path/test_ust 39 - UST per-uid network trace path is
>>> >> valid
>>> >> > |FAIL: tools/save-load/test_autoload 1 - Start session daemon
>>> >> > |FAIL: tools/save-load/test_autoload 3 - No session daemon to kill
>>> >> > |FAIL: tools/save-load/test_load 3 - Destroy session load-42
>>> >> > |FAIL: tools/base-path/test_ust 38 - Destroy session
>>> >> load-stream-extra-path
>>> >> > |FAIL: tools/rotation/test_save_load_mi 21 - Destroy session
>>> >> yTVkM2lxbFoDS7Nu
>>> >> > |FAIL: tools/mi/test_mi 3 - MI test: Version xsd validation
>>> >> > |FAIL: tools/rotation/test_save_load_mi 20 - Found the right rotation
>>> >> size value in list XML after load
>>> >> > |FAIL: tools/base-path/test_ust 40 - Validate trace for event
>>> tp:tptest
>>> >> > |FAIL: tools/base-path/test_ust 36 - Start tracing for session
>>> >> load-stream-extra-path
>>> >> > |FAIL: kernel/test_userspace_probe 92 - Validate userspace probe
>>> listing
>>> >> >
>>> >> > Any ideas?
>>> >> >
>>> >> > Thanks!
>>> >>
>>> >> Hello Bruce,
>>> >>
>>> >> Gentle ping on the above upgrade failure.
>>> >>
>>> >> Do you have time to look at this? If you don't, we'll have organize to
>>> >> find other resources, we can't not update the kernel.
>>> >>
>>> >
>>> > I'll have time next week, but I can't run the test images locally, so
>>> I'll
>>> > need to come up with my
>>> > own tests :)
>>>
>>> Awesome, thanks Bruce!
>>>
>>
>>
>> I bumped -stable again, and when I run the lttng ptests against that
>> kernel, I have all tests passing.
>>
>> So either something in that kernel update fixed it, or I'm doing something
>> wrong.
>>
>> Did you see this once ? or consistently ?
>
> Twice (x86-64 and arm64) but during the same a-full build:
> * https://autobuilder.yoctoproject.org/valkyrie/?#/builders/73/builds/4604
>   qemux86-64-ptest debian11-vk-3 scarthgap completed at 2026-09-21 11:38:31+00:00
> * https://autobuilder.yoctoproject.org/valkyrie/?#/builders/61/builds/4577
>   qemuarm64-ptest ubuntu2404-vk-arm2 scarthgap completed at 2026-09-21 14:57:16+00:00
>
> Then, I removed the patch from the branch.
>
>> There are some AB-INT bugs that you (among others) have been tracking:
>>
>>   - 16309 — ACCEPTED: [scarthgap] AB-INT PTEST: lttng-tools ptest timeout
>>   - 16139 — AB-INT PTEST: lttng-tools ptest failure:
>> tools/config-directory/test_config.py
>>   - 16358 — AB-INT PTEST: lttng-tools: Couldn't login into serial console
>> as root using blank password
>>
>> Could it be one of those ?
>
> I know I've looked through existing bugs and did not find a matching
> one. But, given the fact that it happened twice during the same a-full
> on 2 different architectures, I don't think it was an AB-INT.
>
>> I'll send my stable updates later today, and maybe we can run them again to
>> see if you get the same passes.
>
> Happy to. I usually do 2-3 a-full per review cycles. If the
> lttng-tools ptests are green, I'll consider this fixed and take the
> kernel upgrade patch.
>
> Thanks!

Hi Bruce,

Can you send the linux-yocto/6.6 upgrades for scarthgap "soon-ish"? I've
started a scarthgap review cycle and I would like to include the kernel
upgrade in it if possible.

Thanks!
-- 
Yoann Congal
Smile ECS