Re: [PATCH v8 11/12] zram: fix crashes with cpu hotplug multistate

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On Fri, Oct 15, 2021 at 04:36:11PM +0800, Ming Lei wrote:
> On Thu, Oct 14, 2021 at 05:22:40PM -0700, Luis Chamberlain wrote:
> > On Fri, Oct 15, 2021 at 07:52:04AM +0800, Ming Lei wrote:
> ...
> > > 
> > > We need to understand the exact reason why there is still cpuhp node
> > > left, can you share us the exact steps for reproducing the issue?
> > > Otherwise we may have to trace and narrow down the reason.
> > 
> > See my commit log for my own fix for this issue.
> 
> OK, thanks!
> 
> I can reproduce the issue, and the reason is that reset_store fails
> zram_remove() when unloading module, then the warning is caused.
> 
> The top 3 patches in the following tree can fix the issue:
> 
> https://github.com/ming1/linux/commits/my_v5.15-blk-dev

At a quick glance, those look sane to me, nice work.

greg k-h



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