On Thu, Jul 18, 2019 at 02:14:05PM -0700, David Miller wrote: > From: "Dmitry V. Levin" <ldv@xxxxxxxxxxxx> > Date: Thu, 18 Jul 2019 00:59:56 +0300 > > > So this ended up as commit 7b9afb86b6328f10dc2cad9223d7def12d60e505 > > (thanks to Anatoly for bisecting) and introduced a regression: > > futex.test from the strace test suite now causes an Oops on sparc64 > > in futex syscall. > > > > Here is a heavily stripped down reproducer: > > Does not reproduce for me on a T4-2 machine. > > So this problem might depend on the type of system you are on, > I suspect it's one of those "pre-Niagara vs. Niagara and later" > situations because that's the dividing line between two set of > wildly different TLB and cache management methods. > > What kind of machine are you on? FYI, I'm pretty sure I tested this on Guenthers build test qemu setup in the end, which further speaks for the different machines issue.
