From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Frank Rowand <frowand.list@gmail.com>,
Finn Thain <fthain@telegraphics.com.au>
Cc: Stan Johnson <userm57@yahoo.com>,
Rob Herring <robh+dt@kernel.org>,
Chintan Pandya <cpandya@codeaurora.org>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: v4.17 regression: PowerMac G3 won't boot, was Re: [PATCH v5 1/3] of: cache phandle nodes to reduce cost of of_find_node_by_phandle()
Date: Fri, 31 Aug 2018 14:58:41 +1000 [thread overview]
Message-ID: <d9e53e48794c2eade19309b73febd492e3c5eeeb.camel@kernel.crashing.org> (raw)
In-Reply-To: <0ad5dbfd-08f3-b97d-34b9-70fc9a729921@gmail.com>
On Thu, 2018-08-30 at 21:36 -0700, Frank Rowand wrote:
> > No idea whether that's relevant; I haven't done any further investigation.
> > Complete dmesg output is attached. Please let me know if there's any more
> > information you need to help find the bug.
> >
> > Thanks.
>
> I don't have any useful answers yet, but I am following the thread and have
> also quickly scanned the two commits for any obvious cause. I will look
> into this some more, but have a few other tasks that I need to complete
> first.
>
> A long shot, but something to consider, is that I failed to cover the
> cases of dynamic devicetree updates (removing nodes that contain a
> phandle) in ways other than overlays. Michael Ellerman has reported
> such a problem for powerpc/mobility with of_detach_node(). A patch to
> fix that is one of the tasks I need to complete.
The only thing I can think of is booting via the BootX bootloader on
those ancient macs results in a DT with no phandles. I didn't see an
obvious reason why that would cause that patch to break though.
Cheers,
Ben.
next prev parent reply other threads:[~2018-08-31 4:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1520208889-3908-1-git-send-email-frowand.list@gmail.com>
[not found] ` <1520208889-3908-2-git-send-email-frowand.list@gmail.com>
2018-08-30 0:44 ` v4.17 regression: PowerMac G3 won't boot, was Re: [PATCH v5 1/3] of: cache phandle nodes to reduce cost of of_find_node_by_phandle() Finn Thain
2018-08-30 1:05 ` Rob Herring
2018-08-31 2:39 ` Mac User
2018-08-31 4:35 ` Benjamin Herrenschmidt
2018-08-31 4:49 ` Benjamin Herrenschmidt
2018-08-31 12:28 ` Mac User
2018-08-31 23:36 ` Finn Thain
2018-09-01 4:54 ` Benjamin Herrenschmidt
2018-09-01 4:53 ` Benjamin Herrenschmidt
2018-08-31 4:49 ` Benjamin Herrenschmidt
2018-08-31 4:36 ` Frank Rowand
2018-08-31 4:58 ` Benjamin Herrenschmidt [this message]
2018-09-09 17:04 ` Benjamin Herrenschmidt
2018-09-09 23:52 ` Frank Rowand
2018-09-10 12:53 ` Rob Herring
2018-09-11 15:53 ` Frank Rowand
[not found] ` <abb0dec2-da3a-2c04-0e9f-28851b22cf75@yahoo.com>
2018-09-12 0:15 ` Finn Thain
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