summaryrefslogtreecommitdiff
path: root/kernel/rcu/tree.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2020-03-30 15:52:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-03-30 15:52:00 -0700
commit7c4fa150714fb319d4e2bb2303ebbd7307b0fb6d (patch)
tree6bd36b1721ae89f410ecd002d9a80e048a76653d /kernel/rcu/tree.h
parentd937a6dfc9428f470c3ce4d459c390944ddef538 (diff)
parentbaf5fe761846815164753d1bd0638fd3696db8fd (diff)
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar: "The main changes in this cycle were: - Make kfree_rcu() use kfree_bulk() for added performance - RCU updates - Callback-overload handling updates - Tasks-RCU KCSAN and sparse updates - Locking torture test and RCU torture test updates - Documentation updates - Miscellaneous fixes" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (74 commits) rcu: Make rcu_barrier() account for offline no-CBs CPUs rcu: Mark rcu_state.gp_seq to detect concurrent writes Documentation/memory-barriers: Fix typos doc: Add rcutorture scripting to torture.txt doc/RCU/rcu: Use https instead of http if possible doc/RCU/rcu: Use absolute paths for non-rst files doc/RCU/rcu: Use ':ref:' for links to other docs doc/RCU/listRCU: Update example function name doc/RCU/listRCU: Fix typos in a example code snippets doc/RCU/Design: Remove remaining HTML tags in ReST files doc: Add some more RCU list patterns in the kernel rcutorture: Set KCSAN Kconfig options to detect more data races rcutorture: Manually clean up after rcu_barrier() failure rcutorture: Make rcu_torture_barrier_cbs() post from corresponding CPU rcuperf: Measure memory footprint during kfree_rcu() test rcutorture: Annotation lockless accesses to rcu_torture_current rcutorture: Add READ_ONCE() to rcu_torture_count and rcu_torture_batch rcutorture: Fix stray access to rcu_fwd_cb_nodelay rcutorture: Fix rcu_torture_one_read()/rcu_torture_writer() data race rcutorture: Make kvm-find-errors.sh abort on bad directory ...
Diffstat (limited to 'kernel/rcu/tree.h')
-rw-r--r--kernel/rcu/tree.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 0c87e4c161c2f..9dc2ec021da52 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -68,6 +68,8 @@ struct rcu_node {
/* Online CPUs for next expedited GP. */
/* Any CPU that has ever been online will */
/* have its bit set. */
+ unsigned long cbovldmask;
+ /* CPUs experiencing callback overload. */
unsigned long ffmask; /* Fully functional CPUs. */
unsigned long grpmask; /* Mask to apply to parent qsmask. */
/* Only one bit will be set in this mask. */
@@ -321,6 +323,8 @@ struct rcu_state {
atomic_t expedited_need_qs; /* # CPUs left to check in. */
struct swait_queue_head expedited_wq; /* Wait for check-ins. */
int ncpus_snap; /* # CPUs seen last time. */
+ u8 cbovld; /* Callback overload now? */
+ u8 cbovldnext; /* ^ ^ next time? */
unsigned long jiffies_force_qs; /* Time at which to invoke */
/* force_quiescent_state(). */