From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Ott Date: Mon, 03 Feb 2014 13:17:26 +0000 Subject: Re: linux-3.10+: unable to boot 31bit builds Message-Id: In-Reply-To: <201401221330.30404.vapier@gentoo.org> References: <201401221330.30404.vapier@gentoo.org> To: linux-s390@vger.kernel.org List-ID: Hello, On Tue, 21 Jan 2014, Heiko Carstens wrote: > On Tue, Jan 21, 2014 at 12:22:52PM +0100, Heiko Carstens wrote: > > On Tue, Jan 21, 2014 at 04:57:39AM -0500, Mike Frysinger wrote: > > > hmm, doesn't seem to work for me. don't get a crash, just a "virtual machine > > > is placed in CP mode due to a SIGP initial C". whatever that means :). > > > > Ah, that probably happened because the kernel failed to mount the > > root file system and killed all CPUs before printing a nice error message. > > Ok, that's not correct. Just bisected it down to: > > commit 14556b33f2a5d6a3bc75cd33b709452a31555b25 > Author: Sebastian Ott > Date: Sat Apr 13 13:03:54 2013 +0200 > > s390/css: introduce cio_register_early_subchannels > > Use cio_register_early_subchannels to register early subchannels > which are already in use. Call this function before we do the > actual subchannel scanning loop. This helps us to get rid of some > more special cases regarding the console subchannel. > > Reviewed-by: Peter Oberparleiter > Signed-off-by: Sebastian Ott > Signed-off-by: Martin Schwidefsky > > For some non-obvious reason this kills 31 bit with your config under z/VM. > The patch to address this is scheduled for upstream inclusion. Thanks to both of you for reporting/debugging this! Regards, Sebastian