On Mon, 2012-09-24 at 09:37 +0200, Linus Walleij wrote:
- Drilled into the RCU lockup. With some help from Paul McKenney we got a task dump from CPU0 (the CPU that is locking) but not much more - only the swapper thread is running there and we need to dump its stack.
Quite probably unrelated, but I've seen an RCU lockup on vexpress TC2... https://bugs.launchpad.net/linaro-landing-team-arm/+bug/1051993
That was a kernel built from linux-linaro branch at this tag http://git.linaro.org/gitweb?p=kernel/linux-linaro-tracking.git%3Ba=shortlog...
This is 3.6-rc5-ish and includes Linaro's big.LITTLE MP branch http://git.linaro.org/gitweb?p=arm/big.LITTLE/mp.git%3Ba=shortlog%3Bh=refs/h... which has a couple of RCU patches from Paul, amongst other things.