Messages in this thread | | | Date | Sat, 17 Aug 2013 20:17:17 -0700 | From | Josh Triplett <> | Subject | Re: [PATCH tip/core/rcu 01/11] rcu: Expedite grace periods during suspend/resume |
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On Sat, Aug 17, 2013 at 06:37:46PM -0700, Paul E. McKenney wrote: > From: Borislav Petkov <bp@alien8.de> > > CONFIG_RCU_FAST_NO_HZ can increase grace-period durations by up to > a factor of four, which can result in long suspend and resume times. > Thus, this commit temporarily switches to expedited grace periods when > suspending the box and return to normal settings when resuming. > > [ paulmck: This also papers over an audio/irq bug, but hopefully that will > be fixed soon. ] > > Signed-off-by: Borislav Petkov <bp@suse.de> > Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This patch still seems like a hack, and there *ought* to be a better general solution to avoid excessive grace-period latency. Nonetheless, in the absence of such a solution, Reviewed-by: Josh Triplett <josh@joshtriplett.org>
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