Re: [tip: locking/urgent] futex: Allow to resize the private local hash

[Calvin Owens]

On Saturday 06/21 at 23:01 +0200, Sebastian Andrzej Siewior wrote:
> On 2025-06-21 00:24:14 [-0700], Calvin Owens wrote:
> > 
> > I went back to the original GCC config, and set up yocto to log what it
> > was doing over /dev/kmsg so maybe we can isolate the trigger.
> > 
> > I got a novel oops this time:
> 
> I think I got it:
> 
> Could you please try this:

That did it!

Tested-By: Calvin Owens <calvin@xxxxxxxxxx>

This was a fun little diversion, thanks :)

> diff --git a/include/linux/futex.h b/include/linux/futex.h
> index 005b040c4791b..b37193653e6b5 100644
> --- a/include/linux/futex.h
> +++ b/include/linux/futex.h
> @@ -89,6 +89,7 @@ void futex_hash_free(struct mm_struct *mm);
>  static inline void futex_mm_init(struct mm_struct *mm)
>  {
>  	RCU_INIT_POINTER(mm->futex_phash, NULL);
> +	mm->futex_phash_new = NULL;
>  	mutex_init(&mm->futex_hash_lock);
>  }
>  
> 
> Sebastian