[Regression 5.7-rc1] Random hangs on 32-bit PowerPC (PowerBook6,7)

[Christophe Leroy]

Hi,

Le 18/05/2020 à 13:20, Rui Salvaterra a écrit :
> [Resending since I messed up the subject, sorry]
> 
> Hi, everyone,
> 
> Something went wrong between Linux 5.6 and 5.7-rc1. This is an iBook
> G4 laptop with 1.5 GiB of RAM running the Debian powerpc port. I
> haven't bisected yet, since it's going to take quite a bit of time, so
> I'm sending this mostly as a heads-up (and to see if anybody has any
> clues about the possible cause). I'm using the following reproducer:
> 
> stress-ng --cpu 8 --io 8 --vm 8 --vm-bytes 1G --fork 8 --timeout 10m
> 
> On Linux 5.7-rc1, this completely hangs the machine in about 30
> seconds. Linux 5.6 survives the test. Let me know if I can provide any
> additional info, otherwise I'll just bite the bullet and start
> bisecting.
> 

Can you provide your .config, tell which GCC version you are using, and 
tell a bit more about your config: amount of RAM, is there swap, etc ...