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author | Ingo Molnar <mingo@kernel.org> | 2018-01-03 14:14:18 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2018-01-03 14:14:18 +0100 |
commit | 475c5ee193fd682c6383b5e418e65e46a477d176 (patch) | |
tree | 43f70a77d919e10237edbbbc3ca7ac8076d27410 /Documentation/RCU/stallwarn.txt | |
parent | Linux 4.15-rc6 (diff) | |
parent | Merge branches 'cond_resched.2017.12.04a', 'dyntick.2017.11.28a', 'fixes.2017... (diff) | |
download | linux-475c5ee193fd682c6383b5e418e65e46a477d176.tar.xz linux-475c5ee193fd682c6383b5e418e65e46a477d176.zip |
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney:
- Updates to use cond_resched() instead of cond_resched_rcu_qs()
where feasible (currently everywhere except in kernel/rcu and
in kernel/torture.c). Also a couple of fixes to avoid sending
IPIs to offline CPUs.
- Updates to simplify RCU's dyntick-idle handling.
- Updates to remove almost all uses of smp_read_barrier_depends()
and read_barrier_depends().
- Miscellaneous fixes.
- Torture-test updates.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/RCU/stallwarn.txt')
-rw-r--r-- | Documentation/RCU/stallwarn.txt | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/Documentation/RCU/stallwarn.txt b/Documentation/RCU/stallwarn.txt index a08f928c8557..4259f95c3261 100644 --- a/Documentation/RCU/stallwarn.txt +++ b/Documentation/RCU/stallwarn.txt @@ -23,12 +23,10 @@ o A CPU looping with preemption disabled. This condition can o A CPU looping with bottom halves disabled. This condition can result in RCU-sched and RCU-bh stalls. -o For !CONFIG_PREEMPT kernels, a CPU looping anywhere in the - kernel without invoking schedule(). Note that cond_resched() - does not necessarily prevent RCU CPU stall warnings. Therefore, - if the looping in the kernel is really expected and desirable - behavior, you might need to replace some of the cond_resched() - calls with calls to cond_resched_rcu_qs(). +o For !CONFIG_PREEMPT kernels, a CPU looping anywhere in the kernel + without invoking schedule(). If the looping in the kernel is + really expected and desirable behavior, you might need to add + some calls to cond_resched(). o Booting Linux using a console connection that is too slow to keep up with the boot-time console-message rate. For example, |