Hi, I believe I have encountered a bug in kernel 3.6-rc3. It starts with the assertion in mm/slab.c:2629 failing, and then the system hangs. I can reproduce this bug by running a large compilation (compiling the kernel for instance). Here's what I see in netconsole: > ------------[ cut here ]------------ > kernel BUG at mm/slab.c:2629! > invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC I'm attaching netconsole logs I got with kernel 3.6-rc1, which contain a little more details after the crash, but for some reason netconsole didn't capture the full stack trace of the assertion. I caught a glimpse at the console and I saw RIP was at cache_alloc_refill. I'd be happy to provide further information or perform testing to help solve this issue. Regards, Haggai Eran