Re: [PATCH 6.6 000/474] 6.6.140-rc1 review

[Wentao Guan]

>Am 16.05.2026 um 12:09 schrieb Greg KH:
>> On Sat, May 16, 2026 at 03:07:14AM +0800, Wentao Guan wrote:
>>> Build failed, you can drop the commit to build ok, same as 6.18.30-rc1:
>>> git revert 14d9ce90cf4855d638ecbcdb0c208a144d6f991b..
>>> Revert "sched_ext: Use HK_TYPE_DOMAIN_BOOT to detect isolcpus= domain isolation"
>>>
>>> Tested-by: Wentao Guan <guanwentao@xxxxxxxxxxxxx>
>>>
>>> BRs
>>> Wentao Guan
>>>
>>> defconfigs:
>>> https://gist.github.com/opsiff/a840ae9e3d6857f5b7bacb9cdc49f8e9
>>>
>>> Log:
>>> In file included from kernel/sched/build_policy.c:63:
>>> kernel/sched/ext.c: In function ‘scx_ops_enable’:
>>> kernel/sched/ext.c:5524:34: error: ‘HK_TYPE_DOMAIN_BOOT’ undeclared (first use in this function); did you mean ‘HK_TYPE_DOMAIN’?
>>>   5524 |         if (housekeeping_enabled(HK_TYPE_DOMAIN_BOOT)) {
>>>        |                                  ^~~~~~~~~~~~~~~~~~~
>>>        |                                  HK_TYPE_DOMAIN
>>>
>>> missed HK_TYPE_DOMAIN_BOOT is introduced in this commit:
>>>
>>> commit 4fca0e550d506e1c95504c2d9247bc92bf621bf6
>>> Author: Frederic Weisbecker <frederic@xxxxxxxxxx>
>>> Date:   Mon May 26 13:06:21 2025 +0200
>>>
>>>      sched/isolation: Save boot defined domain flags
>>>
>>>      HK_TYPE_DOMAIN will soon integrate not only boot defined isolcpus= CPUs
>>>      but also cpuset isolated partitions.
>>>
>>>      Housekeeping still needs a way to record what was initially passed
>>>      to isolcpus= in order to keep these CPUs isolated after a cpuset
>>>      isolated partition is modified or destroyed while containing some of
>>>      them.
>>>
>>>      Create a new HK_TYPE_DOMAIN_BOOT to keep track of those.
>>>
>>>      Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
>>>      Reviewed-by: Phil Auld <pauld@xxxxxxxxxx>
>>>      Reviewed-by: Waiman Long <longman@xxxxxxxxxx>
>>>      Cc: Ingo Molnar <mingo@xxxxxxxxxx>
>>>      Cc: Marco Crivellari <marco.crivellari@xxxxxxxx>
>>>      Cc: Michal Hocko <mhocko@xxxxxxxx>
>>>      Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
>>>      Cc: Tejun Heo <tj@xxxxxxxxxx>
>>>      Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
>>>      Cc: Vlastimil Babka <vbabka@xxxxxxx>
>>>      Cc: Waiman Long <longman@xxxxxxxxxx>
>>>
>> 
>> Also dropped from here, thanks.  My fault, I should have only backported
>> this to 7.0.y as the commit itself said to.
>> 
>> greg k-h
>
>
>Now I really wonder why I didn't hit this build error with that patch included in 6.12.90-rc1...
>Because I hit it in 6.18.32-rc!
>
>Let me check my .config ...
>
>Beste Grüße,
>Peter Schneider

Hello,

I thought that 'CONFIG_SCHED_CLASS_EXT' is what you found,
and it is depends include 'DEBUG_INFO_BTF' which depend pahole (maybe missed).

BRs
Wentao Guan