rcu/nocb: Enable re-awakening under high callback load

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The __call_rcu_nocb_wake() function and its predecessors set
->qlen_last_fqs_check to zero for the first callback and to LONG_MAX / 2
for forced reawakenings.  The former can result in a too-quick reawakening
when there are many callbacks ready to invoke and the latter prevents a
second reawakening.  This commit therefore sets ->qlen_last_fqs_check
to the current number of callbacks in both cases.  While in the area,
this commit also moves both assignments under ->nocb_lock.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

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Paul E. McKenney 2019-05-23 10:43:58 -07:00

parent 0bd55c6936

commit aeeacd9d84

1 changed files with 2 additions and 2 deletions

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kernel/rcu/tree_plugin.h

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