From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Michael Ellerman <michael@ellerman.id.au>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: Re: powerpc/powernv: Call OPAL sync before kexec'ing
Date: Thu, 16 Jan 2014 12:02:52 +1100 [thread overview]
Message-ID: <1389834172.6933.99.camel@pasglop> (raw)
In-Reply-To: <1389833903.31288.1.camel@concordia>
On Thu, 2014-01-16 at 11:58 +1100, Michael Ellerman wrote:
> On Wed, 2014-01-15 at 17:02 +1100, Benjamin Herrenschmidt wrote:
> > From: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
> >
> > Its possible that OPAL may be writing to host memory during
> > kexec (like dump retrieve scenario). In this situation we might
> > end up corrupting host memory.
>
> Are we happy with that happening during kdump? (which doesn't call any of the
> shutdown paths)
Obviously not ... There's a problem there. Not sure what the right fix
is. Might need some ifdef KDUMP to take over in the new driver.
Ben.
prev parent reply other threads:[~2014-01-16 1:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 6:02 powerpc/powernv: Call OPAL sync before kexec'ing Benjamin Herrenschmidt
2014-01-16 0:58 ` Michael Ellerman
2014-01-16 1:02 ` Benjamin Herrenschmidt [this message]
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