Re: sched/debug: Dump end of stack when detected corrupted

[John Paul Adrian Glaubitz]

Hi Feng,

> -	if (task_stack_end_corrupted(prev))
> +	if (task_stack_end_corrupted(prev)) {
> +		unsigned long *ptr = end_of_stack(prev);
> +
> +		/* Dump 16 ulong words around the corruption point */
> +#ifdef CONFIG_STACK_GROWSUP
> +		ptr -= 15;
> +#endif
> +		print_hex_dump(KERN_ERR, "Corrupted Stack: ",
> +			DUMP_PREFIX_ADDRESS, 16, 1, ptr, 16 * sizeof(*ptr), 1);
> +

I would recommend determining the buffer element size with sizeof(unsigned long) for
better readability and using "true" instead of "1" to set the value of the ascii
parameter to print_hex_dump(), see [1]. Otherwise looks good to me.

Reviewed-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>

PS: Please CC me for a potential v3.

Thanks,
Adrian

> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/hexdump.c#n252

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