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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-01-25 12:00:40 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-01-25 12:00:40 -0800 |
| commit | 59d8cc6b2e375ff486b030da6703b1d481e186e6 (patch) | |
| tree | 35d3774041670a69e5d894a68c7c3bc18b5368eb /kernel | |
| parent | 0e247386d9ed5ab8b7dad010cf4b183efeb1e47d (diff) | |
| download | lwn-59d8cc6b2e375ff486b030da6703b1d481e186e6.tar.gz lwn-59d8cc6b2e375ff486b030da6703b1d481e186e6.zip | |
rcu: Forgive slow expedited grace periods at boot time
Boot-time processing often loops in the kernel longer than one might
prefer, which can prevent expedited grace periods from completing in
a timely manner. This in turn triggers a splat In nohz_full CPUs One
could argue that long-looping code should be fixed, but on the other hand,
boot time is a bit special.
This commit therefore removes the splat. Later commits will add the
splat back in, but in a way that removes false positives.
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcu/tree_exp.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 6935a9e2b094..dcbd75791f39 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -508,7 +508,6 @@ static void synchronize_rcu_expedited_wait(void) tick_dep_set_cpu(cpu, TICK_DEP_BIT_RCU_EXP); } } - WARN_ON_ONCE(1); } for (;;) { |