Hi, On Tue, 6 Aug 2002 20:33:09 +0200 Erich Focht <efocht@ess.nec.de> wrote: > The patch looks fine. Before applying it to 2.5.29 my BigSur ended up > with no tasks beeing scheduled to cpu#1 and no migration_task and > ksoftirqd for the same cpu. > > But the system came up. After applying it > the system hangs in the boot sequence right after "Freeing unused > kernel memory". But CPU#1 was woken up correctly. Sorry, have no kdb > to be able to tell you more... > > Does anybody else have these problems? ksoftirqd and migration_thread are spawned in cpu_up() in kernel/cpu.c. But, cpu_up() wasn't called because the cpu had already been running at that time (see arch/ia64/kernel/smpboot.c and init/main.c.) I tried to change init/main.c to call cpu_up() for APs, and I made sure that the kernel caused the system hangs as you reported. This means that 2.5.29 kernel is not stable on SMP regardless of CPU Hot Plug patch applying. I found that kudzu(1) and shutdown of ethernet may cause system hangs but I'm not sure why. Regards, Kimi -- Kimio Suganuma <k-suganuma@mvj.biglobe.ne.jp>Received on Wed Aug 07 21:20:28 2002
This archive was generated by hypermail 2.1.8 : 2005-08-02 09:20:09 EST