On 01.06.2011 20:44, Peter Zijlstra wrote:
On Wed, 2011-06-01 at 20:09 +0200, Peter Zijlstra wrote:On Wed, 2011-06-01 at 19:20 +0200, Arne Jansen wrote:On 01.06.2011 18:35, Peter Zijlstra wrote: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?They don't go out to the serial line, I only observe them with a tail -f on messages. Default log level doesn't go the console here.Right ok, so I used your exact .config, added a few drivers needed for my hardware and indeed, it doesn't even finish booting and gets stuck someplace. Sadly it looks like even the NMI watchdog is dead,.. /me goes try and make sense of this.Sadly both 0122ec5b02f766c355b3168df53a6c038a24fa0d^1 and 0122ec5b02f766c355b3168df53a6c038a24fa0d itself boot just fine and run the test module without problems.
I can only partially confirm this: 2acca55ed98ad9b9aa25e7e587ebe306c0313dc7 runs fine 0122ec5b02f766c355b3168df53a6c038a24fa0d freezes after line 189 ab2515c4b98f7bc4fa11cad9fa0f811d63a72a26 freezes after line 39
I will have to re-bisect this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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