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From: Joel Fernandes <jfern@kernel.org>
To: linux-kernel@vger.kernel.org,
	"Paul E . McKenney" <paulmck@kernel.org>,
	Frederic Weisbecker <frederic@kernel.org>,
	Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
	Joel Fernandes <jfern@kernel.org>,
	Josh Triplett <josh@joshtriplett.org>,
	Boqun Feng <boqun@kernel.org>,
	Uladzislau Rezki <urezki@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	Zqiang <qiang.zhang@linux.dev>, Jonathan Corbet <corbet@lwn.net>,
	Shuah Khan <skhan@linuxfoundation.org>,
	Randy Dunlap <rdunlap@infradead.org>
Cc: rcu@vger.kernel.org, Yonghao Zhang <hyz3367@gmail.com>,
	linux-doc@vger.kernel.org
Subject: [PATCH for-v7.5 4/5] doc: Fix stale RCU_GP_WAIT_FQS value in stallwarn.rst
Date: Thu, 12 Nov 2026 19:50:53 -0500	[thread overview]
Message-ID: <20261113005056.2793983-5-jfern@kernel.org> (raw)
In-Reply-To: <20261113005056.2793983-1-jfern@kernel.org>

From: Yonghao Zhang <hyz3367@gmail.com>

The sample "kthread starved" splat in stallwarn.rst shows
RCU_GP_WAIT_FQS(3), which was correct when the example was captured,
but has been stale since commit fea3f222d352 ("rcu: Record ->gp_state
for both phases of grace-period initialization") inserted
RCU_GP_ONOFF (3) and RCU_GP_INIT (4) ahead of it, shifting
RCU_GP_WAIT_FQS from 3 to 5.

Update the sample output to show (5), matching the current tree.h
values and the later "kthread timer wakeup" example in the same file.

Fixes: fea3f222d352 ("rcu: Record ->gp_state for both phases of grace-period initialization")
Signed-off-by: Yonghao Zhang <hyz3367@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Zqiang <qiang.zhang@linux.dev>
Link: https://lore.kernel.org/r/20261014063130.3691735-1-hyz3367@gmail.com
Signed-off-by: Joel Fernandes <jfern@kernel.org>
---
 Documentation/RCU/stallwarn.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/RCU/stallwarn.rst b/Documentation/RCU/stallwarn.rst
index a986358a5c27..118c47506753 100644
--- a/Documentation/RCU/stallwarn.rst
+++ b/Documentation/RCU/stallwarn.rst
@@ -314,7 +314,7 @@ If the relevant grace-period kthread has been unable to run prior to
 the stall warning, as was the case in the "All QSes seen" line above,
 the following additional line is printed::
 
-	rcu_sched kthread starved for 23807 jiffies! g7075 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1 ->cpu=5
+	rcu_sched kthread starved for 23807 jiffies! g7075 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x1 ->cpu=5
 	Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
 
 Starving the grace-period kthreads of CPU time can of course result
-- 
2.54.0


  parent reply	other threads:[~2026-11-13  0:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20261113005056.2793983-1-jfern@kernel.org>
2026-11-13  0:50 ` [PATCH for-v7.5 1/5] doc: Update recent SRCU API additions to whatisRCU.rst Joel Fernandes
2026-11-13  0:50 ` [PATCH for-v7.5 3/5] doc: Document atomic SRCU in Design/Requirements/Requirements.rst Joel Fernandes
2026-11-13  0:50 ` Joel Fernandes [this message]
2026-11-13  0:50 ` [PATCH for-v7.5 5/5] doc: Document additional RCU task-stall dump information Joel Fernandes

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