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From: Mike Galbraith <efault@gmx.de>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-rt-users <linux-rt-users@vger.kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>
Subject: 0087-rcu-Use-a-raw_spinlock_t-for-kfree-batching.patch
Date: Sun, 05 Apr 2020 06:53:43 +0200	[thread overview]
Message-ID: <1586062423.4816.15.camel@gmx.de> (raw)
In-Reply-To: <20200403170443.pzm24672qo4hufcm@linutronix.de>

Hi Sebastian,

Just a heads up wrt $subject...

I had done the same in my 5.6 tree, but then 5.7 came along, and I had
to revisit due to 34c881745549e adding an allocation under that lock
with irqs disabled.  The same commit that added the lock added this.

	local_irq_save(flags);  // For safely calling this_cpu_ptr().

Whacking that instead of converting the lock cures 5.6 and 5.7 woes.

	-Mike

  reply	other threads:[~2020-04-05  4:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-03 17:04 [ANNOUNCE] v5.6.2-rt1 Sebastian Andrzej Siewior
2020-04-05  4:53 ` Mike Galbraith [this message]
2020-04-15 13:34   ` 0087-rcu-Use-a-raw_spinlock_t-for-kfree-batching.patch Sebastian Andrzej Siewior
2020-04-08  7:00 ` [ANNOUNCE] v5.6.2-rt1 Juri Lelli
2020-04-15 11:12   ` Sebastian Andrzej Siewior
2020-04-15 13:37     ` Juri Lelli

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