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From: Tejun Heo <tj@kernel.org>
To: David Vernet <void@manifault.com>,
	Andrea Righi <andrea.righi@linux.dev>,
	Changwoo Min <changwoo@igalia.com>
Cc: Dan Schatzberg <schatzberg.dan@gmail.com>,
	Emil Tsalapatis <etsal@meta.com>,
	sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org,
	Tejun Heo <tj@kernel.org>, Andrea Righi <arighi@nvidia.com>
Subject: [PATCH v2 09/14] sched_ext: Make handle_lockup() propagate scx_verror() result
Date: Mon, 10 Nov 2025 10:56:31 -1000	[thread overview]
Message-ID: <20251110205636.405592-10-tj@kernel.org> (raw)
In-Reply-To: <20251110205636.405592-1-tj@kernel.org>

handle_lockup() currently calls scx_verror() but ignores its return value,
always returning true when the scheduler is enabled. Make it capture and return
the result from scx_verror(). This prepares for hardlockup handling.

Cc: Dan Schatzberg <schatzberg.dan@gmail.com>
Cc: Emil Tsalapatis <etsal@meta.com>
Reviewed-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---
 kernel/sched/ext.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index d9572bf99b5b..566ef100e2be 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -3655,6 +3655,7 @@ static __printf(1, 2) bool handle_lockup(const char *fmt, ...)
 {
 	struct scx_sched *sch;
 	va_list args;
+	bool ret;
 
 	guard(rcu)();
 
@@ -3666,9 +3667,9 @@ static __printf(1, 2) bool handle_lockup(const char *fmt, ...)
 	case SCX_ENABLING:
 	case SCX_ENABLED:
 		va_start(args, fmt);
-		scx_verror(sch, fmt, args);
+		ret = scx_verror(sch, fmt, args);
 		va_end(args);
-		return true;
+		return ret;
 	default:
 		return false;
 	}
-- 
2.51.2


  parent reply	other threads:[~2025-11-10 20:56 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-10 20:56 [PATCHSET v2 sched_ext/for-6.19] sched_ext: Improve bypass mode scalability Tejun Heo
2025-11-10 20:56 ` [PATCH v2 01/14] sched_ext: Don't set ddsp_dsq_id during select_cpu in bypass mode Tejun Heo
2025-11-10 21:21   ` Emil Tsalapatis
2025-11-10 21:56   ` Tejun Heo
2025-11-10 20:56 ` [PATCH v2 02/14] sched_ext: Make slice values tunable and use shorter slice " Tejun Heo
2025-11-10 21:56   ` Emil Tsalapatis
2025-11-11 17:43   ` [PATCH v3 02/14] sched_ext: Use " Tejun Heo
2025-11-11 18:07     ` Andrea Righi
2025-11-10 20:56 ` [PATCH v2 03/14] sched_ext: Refactor do_enqueue_task() local and global DSQ paths Tejun Heo
2025-11-10 22:06   ` Emil Tsalapatis
2025-11-10 20:56 ` [PATCH v2 04/14] sched_ext: Use per-CPU DSQs instead of per-node global DSQs in bypass mode Tejun Heo
2025-11-10 21:43   ` Emil Tsalapatis
2025-11-10 21:59     ` Tejun Heo
2025-11-10 23:26       ` Emil Tsalapatis
2025-11-10 20:56 ` [PATCH v2 05/14] sched_ext: Simplify breather mechanism with scx_aborting flag Tejun Heo
2025-11-11 16:34   ` Emil Tsalapatis
2025-11-10 20:56 ` [PATCH v2 06/14] sched_ext: Exit dispatch and move operations immediately when aborting Tejun Heo
2025-11-10 20:56 ` [PATCH v2 07/14] sched_ext: Make scx_exit() and scx_vexit() return bool Tejun Heo
2025-11-10 20:56 ` [PATCH v2 08/14] sched_ext: Refactor lockup handlers into handle_lockup() Tejun Heo
2025-11-10 20:56 ` Tejun Heo [this message]
2025-11-10 20:56 ` [PATCH v2 10/14] sched_ext: Hook up hardlockup detector Tejun Heo
2025-11-11 18:33   ` [PATCH UPDATED " Tejun Heo
2025-11-11 18:39     ` Tejun Heo
2025-11-10 20:56 ` [PATCH v2 11/14] sched_ext: Add scx_cpu0 example scheduler Tejun Heo
2025-11-10 20:56 ` [PATCH v2 12/14] sched_ext: Factor out scx_dsq_list_node cursor initialization into INIT_DSQ_LIST_CURSOR Tejun Heo
2025-11-10 23:56   ` Emil Tsalapatis
2025-11-10 20:56 ` [PATCH v2 13/14] sched_ext: Factor out abbreviated dispatch dequeue into dispatch_dequeue_locked() Tejun Heo
2025-11-10 20:56 ` [PATCH v2 14/14] sched_ext: Implement load balancer for bypass mode Tejun Heo

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