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authorDipankar Sarma <dipankar@in.ibm.com>2008-01-25 21:08:23 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-25 21:08:23 +0100
commitc2d727aa2ff17a1c8e5ed1e5e231bb8579b27e82 (patch)
tree76b570288a72c1337920c5e60682316c554f00ee /kernel/rcuclassic.c
parentc49443c538c1bbf50eda27e4a3711e9fc15176b0 (diff)
Preempt-RCU: Use softirq instead of tasklets for
This patch makes RCU use softirq instead of tasklets. It also adds a memory barrier after raising the softirq inorder to ensure that the cpu sees the most recently updated value of rcu->cur while processing callbacks. The discussion of the related theoretical race pointed out by James Huang can be found here --> http://lkml.org/lkml/2007/11/20/603 Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Reviewed-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcuclassic.c')
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