From: "Maciej W. Rozycki" <macro@linux-mips.org>
To: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Ralf Baechle <ralf@linux-mips.org>,
David Daney <david.daney@cavium.com>,
linux-mips@linux-mips.org, linux-kernel@vger.kernel.org,
Hemmo Nieminen <hemmo.nieminen@iki.fi>,
stable@vger.kernel.org
Subject: Re: [PATCH v2 2/2] MIPS: fix kernel lockup or crash after CPU offline/online
Date: Fri, 30 Jan 2015 09:25:14 +0000 (GMT) [thread overview]
Message-ID: <alpine.LFD.2.11.1501300347170.28301@eddie.linux-mips.org> (raw)
In-Reply-To: <1421355719-17576-2-git-send-email-aaro.koskinen@iki.fi>
On Thu, 15 Jan 2015, Aaro Koskinen wrote:
> As printk() invocation can cause e.g. a TLB miss, printk() cannot be
> called before the exception handlers have been properly initialized.
> This can happen e.g. when netconsole has been loaded as a kernel module
> and the TLB table has been cleared when a CPU was offline.
Hmm, why can a call to `printk' cause a TLB miss, what's so special about
this function? Does it use kernel mapped addresses for any purpose such
as `vmalloc'?
Maciej
next prev parent reply other threads:[~2015-01-30 9:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-15 21:01 [PATCH v2 1/2] MIPS: OCTEON: fix kernel crash when offlining a CPU Aaro Koskinen
2015-01-15 21:01 ` [PATCH v2 2/2] MIPS: fix kernel lockup or crash after CPU offline/online Aaro Koskinen
2015-01-30 9:25 ` Maciej W. Rozycki [this message]
2015-01-30 10:22 ` James Hogan
2015-01-30 12:47 ` Maciej W. Rozycki
2015-01-30 14:59 ` James Hogan
2015-01-30 17:55 ` Aaro Koskinen
2015-01-30 18:23 ` James Hogan
2015-01-30 18:53 ` Maciej W. Rozycki
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