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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1389834172.6933.99.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=michael@ellerman.id.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).