On Wed, Dec 13, 2017 at 10:52:56AM +0800, Dave Young wrote: > Hi, > > Kexec reboot and kdump has broken on my laptop for long time with > 4.15.0-rc1+ kernels. With the patch below an early panic been fixed: > https://patchwork.kernel.org/patch/10084289/ > > But still can not get a successful reboot, it looked like graphic > issue, but after bisecting the kernel, I got below: > > [dyoung at dhcp-*-* linux]$ git bisect good > There are only 'skip'ped commits left to test. > The first bad commit could be any of: > 2db1f959d9dc16035f2eb44ed5fdb2789b754d6a > 4900be83602b6be07366d3e69f756c1959f4169a > We cannot bisect more! > > These two commits can no be reverted because of code conflicts, thus > I reverted the whole series from Thomas (below commits), with those > x86/vector changes reverted, kexec reboot works fine. > > Could you help to take a look, any thoughts? I can do the test > if you have some debug patch to try. Is it possible that the "second" kernel runs on non-zero CPU? If yes, what if some irqs are only delivered to cpu0? (use cpumask_of(0) directly) Thanks, Yu
