sched_ext: Include remaining task time slice in error state dump

Report the remaining time slice when dumping task information during an
error exit.

This information can be useful for tracking incorrect or excessively
long time slices in schedulers that implement dynamic time slice logic.

Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Author: arighi

kernel/sched/ext.c

@@ -5218,9 +5218,9 @@ static void scx_dump_task(struct seq_buf *s, struct scx_dump_ctx *dctx,
 		  scx_get_task_state(p), p->scx.flags & ~SCX_TASK_STATE_MASK,
 		  p->scx.dsq_flags, ops_state & SCX_OPSS_STATE_MASK,
 		  ops_state >> SCX_OPSS_QSEQ_SHIFT);
-	dump_line(s, "      sticky/holding_cpu=%d/%d dsq_id=%s dsq_vtime=%llu",
+	dump_line(s, "      sticky/holding_cpu=%d/%d dsq_id=%s dsq_vtime=%llu slice=%llu",
 		  p->scx.sticky_cpu, p->scx.holding_cpu, dsq_id_buf,
-		  p->scx.dsq_vtime);
+		  p->scx.dsq_vtime, p->scx.slice);
 	dump_line(s, "      cpus=%*pb", cpumask_pr_args(p->cpus_ptr));
 
 	if (SCX_HAS_OP(dump_task)) {