>>
>> - /*
>> - * It takes 3.4 seconds to remove 80GiB ramdisk.
>> - * So, we need cond_resched to avoid stalling the CPU.
>> - */
>> - cond_resched();
>> + xa_for_each(&brd->brd_pages, idx, page) {
>> + __free_page(page);
>> + cond_resched_rcu();
>
> This should be a regular cond_resched(). The body of the loop is run
> without the RCU read lock held. Surprised none of the bots have noticed
> an unlock-underflow. Perhaps they don't test brd ;-)
>
> With that fixed,
>
> Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
This patch is already queued up for 6.5 in Jens's tree.
I will send this as a fix soon. Thanks.
