-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Steven Rostedt wrote: > That last change (new Preempt RCU) is highly experimental!!! > We are currently testing it now, although it has been through some > minor tests already, we haven't declared it stable yet. > > This new implementation might shave your cat, eat your dog and > make your children miss the bus and be late for school. > You have been warned! As is said many times on this list > "If it breaks, you get to keep the pieces". So don't come crying > to us if something terrible happens, but please let us know > so that we can try to fix what broke. > > That said, please test it as much as possible. We are happy with > the new implementation, but it's still young, and we want to > shake out the problems so it can be pushed up into mainline. > Luckily, I'm currently catless, dogless and childless, so no harm done :) I'm running this kernel on a Thinkpad T60 (Core2 Duo, x86_64). When I suspended to RAM and then resumed, my syslog window started scrolling the following: Oct 2 19:45:46 localhost kernel: [<ffffffff8020ac90>] mwait_idle+0x0/0x5f Oct 2 19:45:46 localhost kernel: [<ffffffff8020ac05>] cpu_idle+0xc7/0xee Oct 2 19:45:46 localhost kernel: [<ffffffff8021c6f3>] start_secondary+0x2e4/0x2f5 Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: WARNING: at include/linux/rcupreempt.h:91 rcu_enter_nohz() Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: Call Trace: Oct 2 19:45:46 localhost kernel: [<ffffffff80254a0b>] tick_nohz_stop_sched_tick+0x1c6/0x2aa Oct 2 19:45:46 localhost kernel: [<ffffffff8020ac90>] mwait_idle+0x0/0x5f Oct 2 19:45:46 localhost gpm[2095]: *** err [gpm.c(529)]: Oct 2 19:45:46 localhost gpm[2095]: select(): Interrupted system call Oct 2 19:45:46 localhost kernel: [<ffffffff8020ab80>] cpu_idle+0x42/0xee Oct 2 19:45:46 localhost kernel: [<ffffffff8021c6f3>] start_secondary+0x2e4/0x2f5 Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: WARNING: at include/linux/rcupreempt.h:99 rcu_exit_nohz() Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: Call Trace: Oct 2 19:45:46 localhost kernel: [<ffffffff80254b71>] tick_nohz_restart_sched_tick+0x82/0x17d Oct 2 19:45:46 localhost kernel: [<ffffffff8020ac90>] mwait_idle+0x0/0x5f Oct 2 19:45:46 localhost kernel: [<ffffffff8020ac05>] cpu_idle+0xc7/0xee Oct 2 19:45:46 localhost kernel: [<ffffffff8021c6f3>] start_secondary+0x2e4/0x2f5 Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: WARNING: at include/linux/rcupreempt.h:91 rcu_enter_nohz() Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: Call Trace: Oct 2 19:45:46 localhost kernel: [<ffffffff80254a0b>] tick_nohz_stop_sched_tick+0x1c6/0x2aa Oct 2 19:45:46 localhost kernel: [<ffffffff8020ac90>] mwait_idle+0x0/0x5f Oct 2 19:45:46 localhost kernel: [<ffffffff8020ab80>] cpu_idle+0x42/0xee Oct 2 19:45:46 localhost kernel: [<ffffffff8021c6f3>] start_secondary+0x2e4/0x2f5 Oct 2 19:45:46 localhost kernel: Oct 2 19:45:46 localhost kernel: WARNING: at include/linux/rcupreempt.h:99 rcu_exit_nohz() Ad infinitum. Not sure what you're looking for to be cleared in the enter and exit functions, but it doesn't look like it's happening after a resume. Didn't seem to affect the behavior of the kernel, since the network came up and I was able to function normally (or as normally as I can function). Clark -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFHAuoxHyuj/+TTEp0RAtwQAJ41+q49fJXmKB9+WKdphDFc/iUcyACeOgGF 5JV0gQb+fFuCf2MDjMuTyVA= =pSNr -----END PGP SIGNATURE----- - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
