Messages in this thread | | | Date | Sun, 16 Jul 2017 22:59:42 -0700 | From | Tony Lindgren <> | Subject | Re: Droid 4 boot failure due to 422580c3cea7 (mm/oom_kill.c: add tracepoints for oom reaper-related events) |
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* Roman Gushchin <guro@fb.com> [170716 05:55]: > On Fri, Jul 14, 2017 at 07:23:43PM +0200, Sebastian Reichel wrote: > > Hi, > > > > On Fri, Jul 14, 2017 at 02:12:21PM +0000, Roman Gushchin wrote: > > > > On 14 Jul 2017, at 14:43, Sebastian Reichel <sebastian.reichel@collabora.co.uk> wrote: > > > > I just bisected another issue breaking boot on Droid 4. My > > > > bisect points to 422580c3cea7 (mm/oom_kill.c: add tracepoints > > > > for oom reaper-related events). It do not see any message > > > > printed to UART (with earlyprintk) once that commit is part > > > > of my image. Kernel config is below. > > > > > This is really interesting, because this patch adds few > > > tracepoints and all of them are called from the oom code, which is > > > hopefully not a part of the boot process. > > > > > > Can you, please, confirm, that it can be reproduced with some > > > confidence? If so, can you, please, eliminate the tracepoints > > > calls and try to reproduce the boot failure? > > > > I can boot 9967468c0a10 ("Merge branch 'akpm' (patches from > > Andrew)") after adding > > > > - http://git.kernel.org/tip/19d39a3810e7032f311ef83effdac40339b9d022 > > (another issue, that breaks Droid 4 boot) > > - a git revert of 422580c3cea7 > > > > OTOH there are strange problems. Using da16dd9785f8 + above > > two commits also works. Using b5e16170f59b + above commits > > does not work and bisection ended up in the merge commit. > > Hi, Sebastian! > > As commit 422580c3cea7 hasn't added any code, which is executed > during the boot process, I could imagine only two options: > 1) Added code/data occasionally broke some alignment/size contraints. > 2) There is another instable bug, which compromised bisect results. > > Unfortunately, I can't help you with reproducing, because I haven't > necessary hardware. > > Can you, please, try some older known to be good revision with > the 422580c3cea7 patch applied?
Sebastian, for me droid 4 boots just fine with v4.13-rc1 + 19d39a3810e if that helps. So that's with commit 422580c3cea7.
Regards,
Tony
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