Re: Fwd: RCU indicates stalls with iwlwifi, causing boot failures

From: Dave Hansen
Date: Tue Sep 05 2023 - 13:10:40 EST


On 9/1/23 23:59, Hugh Dickins wrote:
> I just took a look at your dmesg in bugzilla: I see lots of page tables
> dumped, including "ESPfix Area", and think you're hitting my screwup: see
>
> https://lore.kernel.org/linux-mm/CABXGCsNi8Tiv5zUPNXr6UJw6qV1VdaBEfGqEAMkkXE3QPvZuAQ@xxxxxxxxxxxxxx/
>
> Please give the patch from the end of that thread a try:

Thanks, Hugh.

I tried a random commit from Linus's tree that didn't boot for me
earlier. Applying your fix allowed me to boot!

I still can't boot Linus's _current_ tree with your patch in it, but
that looks like another failure mode altogether.