On Tue, Oct 03, 2023 at 05:35:31PM -0700, Paul E. McKenney wrote: > On Wed, Oct 04, 2023 at 01:28:58AM +0200, Frederic Weisbecker wrote: > > Hi, > > > > This contains a fix for "SRCU: kworker hung in synchronize_srcu": > > > > http://lore.kernel.org/CANZk6aR+CqZaqmMWrC2eRRPY12qAZnDZLwLnHZbNi=xXMB401g@xxxxxxxxxxxxxx > > > > And a few cleanups. > > > > Passed 50 hours of SRCU-P and SRCU-N. > > > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > > srcu/fixes > > > > HEAD: 7ea5adc5673b42ef06e811dca75e43d558cc87e0 > > > > Thanks, > > Frederic > > Very good, and a big "Thank You!!!" to all of you! > > I queued this series for testing purposes, and have started a bunch of > SRCU-P and SRCU-N tests on one set of systems, and a single SRCU-P and > SRCU-N on another system, but with both scenarios resized to 40 CPU each. > > While that is in flight, a few questions: > > o Please check the Co-developed-by rules. Last I knew, it was > necessary to have a Signed-off-by after each Co-developed-by. > > o Is it possible to get a Tested-by from the original reporter? > Or is this not reproducible? > > o Is it possible to convince rcutorture to find this sort of > bug? Seems like it should be, but easy to say... And one other thing... o What other bugs like this one are hiding elsewhere in RCU? > o Frederic, would you like to include this in your upcoming > pull request? Or does it need more time? Thanx, Paul > > --- > > > > Frederic Weisbecker (5): > > srcu: Fix callbacks acceleration mishandling > > srcu: Only accelerate on enqueue time > > srcu: Remove superfluous callbacks advancing from srcu_start_gp() > > srcu: No need to advance/accelerate if no callback enqueued > > srcu: Explain why callbacks invocations can't run concurrently > > > > > > kernel/rcu/srcutree.c | 55 ++++++++++++++++++++++++++++++++++++--------------- > > 1 file changed, 39 insertions(+), 16 deletions(-)
