CFQ_CFQQ_FLAG_slice_new, /* no requests dispatched in slice */
CFQ_CFQQ_FLAG_sync, /* synchronous queue */
CFQ_CFQQ_FLAG_coop, /* has done a coop jump of the queue */
+ CFQ_CFQQ_FLAG_coop_preempt, /* coop preempt */
};
#define CFQ_CFQQ_FNS(name) \
CFQ_CFQQ_FNS(slice_new);
CFQ_CFQQ_FNS(sync);
CFQ_CFQQ_FNS(coop);
+CFQ_CFQQ_FNS(coop_preempt);
#undef CFQ_CFQQ_FNS
#define cfq_log_cfqq(cfqd, cfqq, fmt, args...) \
{
if (!cfqq) {
cfqq = cfq_get_next_queue(cfqd);
- if (cfqq)
+ if (cfqq && !cfq_cfqq_coop_preempt(cfqq))
cfq_clear_cfqq_coop(cfqq);
}
+ if (cfqq)
+ cfq_clear_cfqq_coop_preempt(cfqq);
+
__cfq_set_active_queue(cfqd, cfqq);
return cfqq;
}
* if this request is as-good as one we would expect from the
* current cfqq, let it preempt
*/
- if (cfq_rq_close(cfqd, rq))
+ if (cfq_rq_close(cfqd, rq) && (!cfq_cfqq_coop(new_cfqq) ||
+ cfqd->busy_queues == 1)) {
+ /*
+ * Mark new queue coop_preempt, so its coop flag will not be
+ * cleared when new queue gets scheduled at the very first time
+ */
+ cfq_mark_cfqq_coop_preempt(new_cfqq);
+ cfq_mark_cfqq_coop(new_cfqq);
return true;
+ }
return false;
}