Re: [PATCH 21/31] blk-throttle: implement sq_to_tg(), sq_to_td() andthrotl_log()

[Vivek Goyal]

On Wed, May 01, 2013 at 05:39:39PM -0700, Tejun Heo wrote:

[..]
> +#define throtl_log(sq, fmt, args...)	do {				\
> +	struct throtl_grp *__tg = sq_to_tg((sq));			\
> +	struct throtl_data *__td = sq_to_td((sq));			\
>  	char __pbuf[128];						\
>  									\
> -	blkg_path(tg_to_blkg(tg), __pbuf, sizeof(__pbuf));		\
> -	blk_add_trace_msg((tg)->td->queue, "throtl %s " fmt, __pbuf, ##args); \
> +	__pbuf[0] = ' ';						\
> +	__pbuf[1] = '\0';						\
> +	if ((__tg))							\
> +		blkg_path(tg_to_blkg(__tg), __pbuf + 1, sizeof(__pbuf) - 1); \
> +	blk_add_trace_msg(__td->queue, "throtl%s" fmt, __pbuf, ##args); \
						^^

We need one extra space ("throtl%s "), otherwise all the messages
start right after cgroup path. We need a space between cgroup path
and actual message.

Thanks
Vivek
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/