> On Jan 21, 2020, at 12:09 AM, Paul E. McKenney <paulmck@xxxxxxxxxx> wrote: > > This is what you get when a grace period has been requested, but does > not start within 21 seconds or so. The "->state: 0x1ffff" is a new one > on me -- that normally happens only before RCU's grace-period kthread > has been spawned. But by 97 seconds after boot, it should definitely > already be up and running. > > Is the system responsive at this point? Yes, it works fine. > > Except... Why is it taking 96 seconds for the system to get to the point > where it prints "Dentry cache hash table entries:"? That happens at 0.139 > seconds on my laptop. And at about the same time on a much larger system. > > I could easily imagine that all sorts of things would break when boot > takes that long. I suppose the kernel has CONFIG_EFI_PGT_DUMP=y, so it takes a while to run just before rcu_check_gp_start_stall().
