Re: [PATCH 2/4] Add pgcollapse controls to task_struct

[Oleg Nesterov]

On 10/23, Alex Thorlton wrote:
>
> --- a/include/linux/sched.h
> +++ b/include/linux/sched.h
> @@ -1661,6 +1661,18 @@ struct task_struct {
>  	unsigned int	sequential_io;
>  	unsigned int	sequential_io_avg;
>  #endif
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> +	struct callback_head pgcollapse_work;
> +	/* default scan 8*512 pte (or vmas) every 30 second */
> +	unsigned int pgcollapse_pages_to_scan;
> +	unsigned int pgcollapse_pages_collapsed;
> +	unsigned int pgcollapse_full_scans;
> +	unsigned int pgcollapse_scan_sleep_millisecs;
> +	/* during fragmentation poll the hugepage allocator once every minute */
> +	unsigned int pgcollapse_alloc_sleep_millisecs;
> +	unsigned long pgcollapse_last_scan;
> +	unsigned long pgcollapse_scan_address;
> +#endif

Shouldn't this all live in mm_struct?

Except pgcollapse_work can't, exit_mm() called before exit_mm(). Probably
it can be allocated.

Oleg.

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