Paul E. McKenney 486e259340 rcu: Avoid waking up CPUs having only kfree_rcu() callbacks ... When CONFIG_RCU_FAST_NO_HZ is enabled, RCU will allow a given CPU to enter dyntick-idle mode even if it still has RCU callbacks queued. RCU avoids system hangs in this case by scheduling a timer for several jiffies in the future. However, if all of the callbacks on that CPU are from kfree_rcu(), there is no reason to wake the CPU up, as it is not a problem to defer freeing of memory. This commit therefore tracks the number of callbacks on a given CPU that are from kfree_rcu(), and avoids scheduling the timer if all of a given CPU's callbacks are from kfree_rcu(). Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>		2012-02-21 09:03:25 -08:00
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acpi	Merge branches 'atomicio-apei', 'hotplug', 'sony-nvs-nosave' and 'thermal-netlink' into release	2012-01-23 19:47:06 -05:00
asm-generic	lib: add NO_GENERIC_PCI_IOPORT_MAP	2012-01-31 23:19:47 +02:00
crypto	…
drm	drm: Fix authentication kernel crash	2012-01-25 09:27:45 +00:00
keys	…
linux	rcu: Avoid waking up CPUs having only kfree_rcu() callbacks	2012-02-21 09:03:25 -08:00
math-emu	…
media	…
misc	…
mtd	…
net	netprio_cgroup: fix wrong memory access when NETPRIO_CGROUP=m	2012-02-10 15:08:57 -05:00
pcmcia	…
rdma	…
rxrpc	…
scsi	…
sound	Merge branch 'fix/asoc' into for-linus	2012-01-31 15:13:14 +01:00
target	target: Change target_submit_cmd() to return void	2012-02-07 06:41:04 +00:00
trace	rcu: Avoid waking up CPUs having only kfree_rcu() callbacks	2012-02-21 09:03:25 -08:00
video	fbdev fixes for 3.3	2012-02-07 15:54:02 -08:00
xen	…
Kbuild	…