linux-kernel - Re: Hang on "echo b > /proc/sysrq-trigger"

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Message-ID: <CAKaWdxafKU6+s-1-5jqw=JzvUE7ntYUh=T3JOooDWVoiHgq9NA@mail.gmail.com>
Date:	Mon, 19 Mar 2012 19:45:10 +1300
From:	Keith Chew <keith.chew@...il.com>
To:	Jon Masters <jonathan@...masters.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Hang on "echo b > /proc/sysrq-trigger"

Hi Jon

> I've just been reviewing LKML for the past month…was there ever any followup?
> Perhaps it's worth discussing a patch to change the below delay?
>

I was about to prepare a patch for this change last Friday, but the
system hanged on Saturday, after a few weeks of smooth reboots. The
other unit with reboot=p (as Eric suggested to be the most reliable
way of rebooting) is still going without any issues, so maybe that is
the best workaround for now.

I have now put the first unit in reboot=p, and will keep monitoring
them. I am open to any other suggestions if anyone has any tweaks they
think will help with the KBD reboot.

Regards
Keith
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