Hello, Following my bug report on debian-powerpc and the following, I'm adding linuxppc-dev to my answer.
Le jeu. 7 nov. 2019 à 11:09, Mathieu Malaterre <ma...@debian.org> a écrit : > On Thu, Nov 7, 2019 at 9:34 AM John Paul Adrian Glaubitz > > The answer here would be git bisect [1]. I would first start downloading > > the current kernel source tarball for 5.3.7 from upstream and build the > > kernel with "make localmodconfig" to see whether it's an upstream or Debian > > problem. > I suspect this is upstream and even before 5.3.7. The original report > by Christian has been discussed on linuxpcc-dev: > <https://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg155248.html> Thanks to you guys I was able to cross-build a kernel (native would have been way to slow) and try to bisect the bug. However, I ended up in another buggy behavior that may or may not be related :-( I tried to localize the bug(s) as best I could. I attach to this the result of 'git bisect log' to see if someone can figure out what's going on. Some of the commits were hand-picked to avoid doing too many 'skip' configurations with the bug described below. As I marked this: *bad*: seems to behave the same as the Debian kernel or git HEAD, that is, crash as reported (or very similar to, at least) by Christian. *good*: either a full boot, or occasionally the kernel dropped me into initramfs complaining about versioning of some symbols - I figured it went far enough so it did not have the bug. The last one in the file is a full boot as I remember it. *skip*: most of them involves hanging just after cpus start (i.e. including 3 messages about kick-up for the extra cpu and one about bringing up being done, then nothing further). Those covers a lot of commits :-( (I used <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git> and my build command was "make ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu- oldconfig && make ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu- -j56 bindeb-pkg", using default values for oldconfig, starting with the config file from Debian at the beginning, cross-gcc is 8.3 from buster, tested on a G5 Quad). Any suggestion, advice, or patch to try welcome :-) Thanks in advance& cordially, -- Romain Dolbeau
ppc64_bisect.log.gz
Description: GNU Zip compressed data
