rcu: Fix cpustart tracepoint gp_seq number

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The "cpustart" trace event shows a stale gp_seq. This is because it uses
rdp->gp_seq, which is updated only at the end of the __note_gp_changes()
function. This commit therefore instead uses rnp->gp_seq.

An alternative fix would be to update rdp->gp_seq earlier, but this would
break RCU's detection of the beginning of a new-to-this-CPU grace period.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Joel Fernandes (Google) 2018-05-13 20:15:41 -07:00 • committed by Paul E. McKenney

parent 5b55072f22

commit 5ca0905f67

1 changed files with 1 additions and 1 deletions

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kernel/rcu/tree.c

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