On Tue, 29 Apr 2014 14:06:36 -0400 r...@redhat.com wrote: > From: Rik van Riel <r...@redhat.com> > > Some sysrq handlers can run for a long time, because they dump a lot > of data onto a serial console. Having RCU stall warnings pop up in > the middle of them only makes the problem worse. > > This patch temporarily disables RCU stall warnings while a sysrq > request is handled. > > ... > > drivers/tty/sysrq.c | 3 +++ > include/linux/rcupdate.h | 12 ++++++++++++ > kernel/rcu/update.c | 12 ++++++++++++
OK, what's going on here. Someone (of, I suspect, a Paulish nature) has plucked out the rcu parts of this patch, put them in linux-next and omitted the drivers/tty part. Very tricky! I have done the opposite and have staged two patches against linux-next: http://ozlabs.org/~akpm/mmots/broken-out/sysrq-rcu-ify-__handle_sysrq.patch http://ozlabs.org/~akpm/mmots/broken-out/sysrqrcu-suppress-rcu-stall-warnings-while-sysrq-runs.patch Please check, review, comment, etc. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
