On Friday 14 February 2020 08:42:57 John Ogness wrote: > On 2020-02-14, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > > On 2020-02-12 12:10:23 [+0000], Sebastien Fabre wrote: > >> Since kernel v5.0, PREEMPT_RT patches contain printk > >> re-implementation. This re-implementation removes some log symbols > >> in VMCOREINFO and crash tool cannot retrieve kernel logs (because > >> symbols no more exist). Is this impact on crash expected? If so, > >> how can we retrieve a functional crash tool with kernel v5.0 (and > >> following) ? > > > > It is known, yes. I'm aware of crash and the gdb scritps should also > > suffer from this. > > Perhaps this should be listed under the "Known issues" of the > PREEMPT_RT release announcements. > > John Ogness I would like to agree, as I think that explains why an attempt to build 5+ in this preempt-rt flavor, on an rpi4, for an rpi4 has been a no boot failure. Plus it appears I'd have to replace the bootloader because raspian puts the overlays in a /boot/overlays subdir whereas you are putting them in /boot (I think, I haven't found the .config magic twanger that puts them in the overlays subdir.) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>
