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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Wander Lairson Costa <wander@redhat.com>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>,
	Przemek Kitszel <przemyslaw.kitszel@intel.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Clark Williams <clrkwllms@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Simon Horman <horms@kernel.org>,
	Jacob Keller <jacob.e.keller@intel.com>,
	"moderated list:INTEL ETHERNET DRIVERS" <intel-wired-lan@lists.osuosl.org>,
	"open list:NETWORKING DRIVERS" <netdev@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:Real-time Linux (PREEMPT_RT):Keyword:PREEMPT_RT" <linux-rt-devel@lists.linux.dev>,
	tglx@linutronix.de
Subject: Re: [PATCH v2 1/4] Revert "igb: Disable threaded IRQ for
 igb_msix_other"
Message-ID: <20241108072003.jJDpdq9u@linutronix.de>
References: <20241106111427.7272-1-wander@redhat.com>
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In-Reply-To: <20241106111427.7272-1-wander@redhat.com>

On 2024-11-06 08:14:26 [-0300], Wander Lairson Costa wrote:
> This reverts commit 338c4d3902feb5be49bfda530a72c7ab860e2c9f.
> 
> Sebastian noticed the ISR indirectly acquires spin_locks, which are
> sleeping locks under PREEMPT_RT, which leads to kernel splats.
> 
> Fixes: 338c4d3902feb ("igb: Disable threaded IRQ for igb_msix_other")
> Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Signed-off-by: Wander Lairson Costa <wander@redhat.com>

Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

This is the only patch.

Sebastian