On Wed, Nov 7, 2018 at 9:17 AM Linus Torvalds <torva...@linux-foundation.org> wrote: > > On Wed, Nov 7, 2018 at 9:10 AM Olof Johansson <o...@lixom.net> wrote: > > > > ARM: SoC fixes > > Pulled. > > > I was a bit too trigger happy to enable PREEMPT on multi_v7_defconfig, > > and it ended up regressing at least BeagleBone XM boards. > > Odd. Did it hit some "may_sleep()" test in a driver that is hidden by > preempt being off? Otherwise I don't see how/why preempt should fail > in a board-specific manner..
The board hangs early during boot and the usual way of collecting early console doesn't seem to work when attempted (I haven't tried personally). It's one of the major non-SMP platforms covered by tests. I'd be surprised if it turns out to be truly _board_ specific (and rather specific to OMAP3), but we don't have enough data yet. Chances are it either shuffles some timing around or indeed hits a may_sleep() test somewhere. (I just realized I might have missed to attribute Guillaume in the revert patch. Sorry about that). -Olof -Olof