Christian Brauner <christian@xxxxxxxxxx> writes: > On Mon, Jul 15, 2019 at 03:56:04PM +0200, Christian Borntraeger wrote: >> I think Vasily already has a clone3 patch for s390x with 435. > > A quick follow-up on this. Helge and Michael have asked whether there > are any tests for clone3. Yes, there will be and I try to have them > ready by the end of the this or next week for review. In the meantime I > hope the following minimalistic test program that just verifies very > very basic functionality (It's not pretty.) will help you test: Hi Christian, Thanks for the test. This actually oopses on powerpc, it hits the BUG_ON in CHECK_FULL_REGS in process.c around line 1633: } else { /* user thread */ struct pt_regs *regs = current_pt_regs(); CHECK_FULL_REGS(regs); *childregs = *regs; if (usp) So I'll have to dig into how we fix that before we wire up clone3. Turns out testing is good! :) cheers