On Thu, May 15, 2014 at 04:24:12PM -0700, Andrew Morton wrote: > 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!
Sounds like something I might do... ;-) I intend to push this for the upcoming merge window, in case it matters. > 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 I defer to Rik for this one. > http://ozlabs.org/~akpm/mmots/broken-out/sysrqrcu-suppress-rcu-stall-warnings-while-sysrq-runs.patch The "[paul...@linux.vnet.ibm.com: fix TINY_RCU build error]" should be removed, since it goes with the patch I queued. Not that it matters that much, I suppose. Thanx, Paul > 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/
