Re: [PATCH RESEND 0/2] blk-mq: fix lockdep warning between sysfs_lock and cpu hotplug lock

[Reinette Chatre <reinette.chatre@intel.com>]

On 12/6/24 3:16 AM, Ming Lei wrote:
> Hello,
> 
> The 1st patch is one prep patch.
> 
> The 2nd one fixes lockdep warning triggered by dependency between
> q->sysfs_lock and cpuhotplug_lock.
> 
> 
> Ming Lei (2):
>   blk-mq: register cpuhp callback after hctx is added to xarray table
>   blk-mq: move cpuhp callback registering out of q->sysfs_lock
> 
>  block/blk-mq.c | 108 ++++++++++++++++++++++++++++++++++++++++++-------
>  1 file changed, 94 insertions(+), 14 deletions(-)
> 

Thank you very much Ming.

While this is a block layer change my focus was on testing resctrl.
With this change using resctrl no longer triggers the lockdep warning
and all else looks good from resctrl side. Thanks again.

Tested-by: Reinette Chatre <reinette.chatre@intel.com> # resctrl impact

Reinette