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.
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