* Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx> [210521 08:45]: > On 21/05/2021 10:39, Tony Lindgren wrote: > > * Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx> [210521 07:05]: > > > On 21/05/2021 08:36, Tony Lindgren wrote: > > > > * Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx> [210520 08:27]: > > > > > Hi, > > > > > > > > > > I've noticed that the v5.13 rcs crash randomly (but quite often) on dra76 evm > > > > > (I haven't tested other boards). Anyone else seen this problem? > > > > > > > > I have not seen this so far and beagle-x15 is behaving for me. > > > > > > > > Does it always happen on boot? > > > > > > No, but quite often. I can't really say how often, as it's annoyingly random. > > > I tried to bisect, but that proved to be difficult as sometimes I get multiple (5+) > > > successful boots before the crash. > > > > > > I tested with x15, same issue (below). So... Something in my kernel config? Or compiler? > > > Looks like the crash happens always very soon after (or during) probing palmas. > > > > After about 10 reboots with your .config I'm seeing it now too on > > beagle-x15. So far no luck reproducing it with omap2plus_defconfig. > > I think I have an easy way to see if a kernel is good or bad, by printing > stack_not_used(current) in the first call to omap_i2c_xfer_irq(). There's a > huge drop between v5.12 and v5.13-rc1. > > And interestingly, sometimes a simple printk seems to use hundreds of bytes > of stack (i.e. compare stack usage before and after the print). But not > always. So maybe the issue is somehow related to printk. > > I'm bisecting. OK sounds good to me. Thanks, Tony
