On Wed, 2011-06-01 at 15:58 +0200, Arne Jansen wrote: > git bisect blames this commit for a problem I have with v3.0-rc1: > If I printk large amounts of data, the machine locks up. > As the commit does not revert cleanly on top of 3.0, I haven't been > able to double check. > The test I use is simple, just add something like > > for (i=0; i < 10000; ++i) printk("test %d\n", i); > > and trigger it, in most cases I can see the first 10 printks before > I have to power cycle the machine (sysrq-b does not work anymore). > Attached my .config. I've made me a module that does the above, I've also changed my .config to match yours (smp=y, sched-cgroup=y, autogroup=n, preempt=n, no_hz=y), but sadly I cannot reproduce, I get all 10k prints on my serial line. Even without serial line it works (somehow booting without visible console is scary as hell :) Which makes me ask, how are you observing your console? Because those 10k lines aren't even near the amount of crap a regular boot spews out on this box, although I guess the tight loop might generate it slightly faster than a regular boot does. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html