* tip-bot for Paul E. McKenney <paul.mckenney@xxxxxxxxxx> wrote: > Commit-ID: b24efdfdf679cf9b05947c531971905fc727dd40 > Gitweb: http://git.kernel.org/tip/b24efdfdf679cf9b05947c531971905fc727dd40 > Author: Paul E. McKenney <paul.mckenney@xxxxxxxxxx> > AuthorDate: Wed, 12 Jan 2011 14:18:11 -0800 > Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> > CommitDate: Fri, 14 Jan 2011 04:58:08 -0800 > > rcu: avoid pointless blocked-task warnings > > If the RCU callback-processing kthread has nothing to do, it parks in > a wait_event(). If RCU remains idle for more than two minutes, the > kernel complains about this. This commit changes from wait_event() > to wait_event_interruptible() to prevent the kernel from complaining > just because RCU is idle. Btw., a sidenote, it's not just about the blocked-tasks lockup detector warning, uninterruptible sleeps will also artificially inflate the load average of the box, +1.0 per such task. So it's definitely a bug to sleep for a very long time uninterruptible. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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