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authorEero Nurkkala <ext-eero.nurkkala@nokia.com>2009-10-07 08:54:26 (GMT)
committerThomas Gleixner <tglx@linutronix.de>2009-10-07 11:05:05 (GMT)
commitfdc6f192e7e1ae80565af23cc33dc88e3dcdf184 (patch)
tree431a47d5fe9b737cc5dd5fe40e178d06f7d579ed /scripts/diffconfig
parent0eca52a92735f43462165efe00a7e394345fb38e (diff)
downloadlinux-fsl-qoriq-fdc6f192e7e1ae80565af23cc33dc88e3dcdf184.tar.xz
NOHZ: update idle state also when NOHZ is inactive
Commit f2e21c9610991e95621a81407cdbab881226419b had unfortunate side effects with cpufreq governors on some systems. If the system did not switch into NOHZ mode ts->inidle is not set when tick_nohz_stop_sched_tick() is called from the idle routine. Therefor all subsequent calls from irq_exit() to tick_nohz_stop_sched_tick() fail to call tick_nohz_start_idle(). This results in bogus idle accounting information which is passed to cpufreq governors. Set the inidle flag unconditionally of the NOHZ active state to keep the idle time accounting correct in any case. [ tglx: Added comment and tweaked the changelog ] Reported-by: Steven Noonan <steven@uplinklabs.net> Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com> Cc: Rik van Riel <riel@redhat.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Greg KH <greg@kroah.com> Cc: Steven Noonan <steven@uplinklabs.net> Cc: stable@kernel.org LKML-Reference: <1254907901.30157.93.camel@eenurkka-desktop> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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