Re: 6.18.13 iwlwifi deadlock allocating cma while work-item is active.

[Tejun Heo]

On Tue, Mar 10, 2026 at 09:47:59AM -1000, Tejun Heo wrote:
> Hello,
> 
> On Tue, Mar 10, 2026 at 12:18:49PM -0700, Ben Greear wrote:
> ...
> > But could this work-item (re)initialization also explain work-queue system going
> > weird?  Just using kthreads, which 'fixes' the problem for me,
> > really shouldn't make a difference to the code below, so probably
> > it is not related?
> 
> Oh, re-initing can deifnitely corrupt things. Workqueue shares work list
> across all work items sharing the pool, so the blast radius can be bigger.
> ie. It'd be *possible* for kthread_worker to get lucky.

BTW, if you enable CONFIG_DEBUG_OBJECTS_WORK, re-init should trigger a dump.

Thanks.

-- 
tejun