[ Let's drop random people and bring in Vlastimil ] Vlastimil, it turns out that the "this patch" is entirely a red herring, and the problem comes and goes randomly with just some code layout issues. See http://server.roeck-us.net/qemu/parisc64-6.10.3/ for more detail, particularly you'll see the "log.bad.gz" with the full log. See also https://lore.kernel.org/all/87y15a4p4h.ffs@tglx/ for this thread. I don't think this is really a slub issue, since it only happens on parisc, but maybe you can see what would make parisc different, and what could possibly make it all timing- or layout-dependent. Linus On Sun, 4 Aug 2024 at 11:36, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > With this patch in v6.10.3, all my parisc64 qemu tests get stuck with repeated error messages > > [ 0.000000] ============================================================================= > [ 0.000000] BUG kmem_cache_node (Not tainted): objects 21 > max 16 > [ 0.000000] ----------------------------------------------------------------------------- > > This never stops until the emulation aborts.