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authorOleg Nesterov <oleg@tv-sign.ru>2006-01-10 17:24:53 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 08:49:47 -0800
commita9c828155ae8d1a1576f9648cc4d9677aea53f89 (patch)
tree7b087188579ff897332a767af1ff695ab5bc116f /kernel/rcupdate.c
parent69a0b3157983925f14fe0bdc49622d5389538d8d (diff)
[PATCH] rcu: fix hotplug-cpu ->donelist leak
Pointed out by Srivatsa Vaddagiri <vatsa@in.ibm.com>. rcu_do_batch() stops after processing maxbatch callbacks on ->donelist leaving rcu_tasklet in TASKLET_STATE_SCHED state. If CPU_DEAD event happens remaining ->donelist entries are lost, rcu_offline_cpu() kills this tasklet. With this patch ->donelist migrates along with ->curlist and ->nxtlist to the current cpu. Compile tested. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Paul E. McKenney <paulmck@us.ibm.com> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/rcupdate.c')
-rw-r--r--kernel/rcupdate.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index e18f9190eafa..0cf8146bd585 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -343,8 +343,9 @@ static void __rcu_offline_cpu(struct rcu_data *this_rdp,
spin_unlock_bh(&rcp->lock);
rcu_move_batch(this_rdp, rdp->curlist, rdp->curtail);
rcu_move_batch(this_rdp, rdp->nxtlist, rdp->nxttail);
-
+ rcu_move_batch(this_rdp, rdp->donelist, rdp->donetail);
}
+
static void rcu_offline_cpu(int cpu)
{
struct rcu_data *this_rdp = &get_cpu_var(rcu_data);

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