linux-kernel - In slow QEMU: task rb_producer:17 blocked for more than 120 seconds.

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Date:	Thu, 6 Sep 2012 17:54:52 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: In slow QEMU: task rb_producer:17 blocked for more than 120 seconds.

Hi Steven,

Two of my test boxes run the slower QEMU VMs and the guest kernels
often trigger warnings like:

[  511.809001] Testing event mm_vmscan_memcg_reclaim_end: [  512.852980] INFO: task rb_producer:17 blocked for more than 120 seconds.
[  513.279212] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

Will it be possible to insert some break into the test thread for
avoiding the warnings?

Thanks,
Fengguang

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