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SubjectRe: [PATCH 21/31] blk-throttle: implement sq_to_tg(), sq_to_td() and throtl_log()
On Mon, May 06, 2013 at 01:36:44PM -0400, Vivek Goyal wrote:
> 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.

Will update.

Thanks.

--
tejun


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