linux_dsm_epyc7002/kernel/rcu
Paul E. McKenney 260e1e4fd8 rcu: Discard separate per-CPU callback counts
Back when there were multiple flavors of RCU, it was necessary to
separately count lazy and non-lazy callbacks for each CPU.  These counts
were used in CONFIG_RCU_FAST_NO_HZ kernels to determine how long a newly
idle CPU should be allowed to sleep before handling its RCU callbacks.
But now that there is only one flavor, the callback counts for a given
CPU's sole rcu_data structure are the counts for that CPU.

This commit therefore removes the rcu_data structure's ->nonlazy_posted
and ->nonlazy_posted_snap fields, the rcu_idle_count_callbacks_posted()
and rcu_cpu_has_callbacks() functions, repurposes the rcu_data structure's
->all_lazy field to record the laziness state at the beginning of the
latest idle sojourn, and modifies CONFIG_RCU_FAST_NO_HZ RCU CPU stall
warnings accordingly.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
2019-01-25 15:28:30 -08:00
..
Kconfig rcu: Clean up flavor-related definitions and comments in Kconfig 2018-08-30 16:03:32 -07:00
Kconfig.debug rcu: Move RCU debug Kconfig options to kernel/rcu 2017-06-08 18:52:44 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rcu_segcblist.c rcu: Simplify and inline cpu_needs_another_gp() 2018-05-15 10:30:59 -07:00
rcu_segcblist.h rcu: Simplify and inline cpu_needs_another_gp() 2018-05-15 10:30:59 -07:00
rcu.h rcu: Eliminate RCU_BH_FLAVOR and RCU_SCHED_FLAVOR 2019-01-25 15:28:25 -08:00
rcuperf.c Merge branches 'doc.2018.08.30a', 'dynticks.2018.08.30b', 'srcu.2018.08.30b' and 'torture.2018.08.29a' into HEAD 2018-08-30 16:12:53 -07:00
rcutorture.c rcutorture: Don't do busted forward-progress testing 2018-12-01 12:45:42 -08:00
srcutiny.c srcu: Use "ssp" instead of "sp" for srcu_struct pointer 2018-11-27 09:24:17 -08:00
srcutree.c srcu: Use "ssp" instead of "sp" for srcu_struct pointer 2018-11-27 09:24:17 -08:00
sync.c Merge branches 'bug.2018.11.12a', 'consolidate.2018.12.01a', 'doc.2018.11.12a', 'fixes.2018.11.12a', 'initrd.2018.11.08b', 'sil.2018.11.12a' and 'srcu.2018.11.27a' into HEAD 2018-12-01 12:43:16 -08:00
tiny.c Merge branches 'doc.2018.08.30a', 'dynticks.2018.08.30b', 'srcu.2018.08.30b' and 'torture.2018.08.29a' into HEAD 2018-08-30 16:12:53 -07:00
tree_exp.h rcu: Inline _synchronize_rcu_expedited() into synchronize_rcu_expedited() 2019-01-25 15:28:29 -08:00
tree_plugin.h rcu: Discard separate per-CPU callback counts 2019-01-25 15:28:30 -08:00
tree.c rcu: Discard separate per-CPU callback counts 2019-01-25 15:28:30 -08:00
tree.h rcu: Discard separate per-CPU callback counts 2019-01-25 15:28:30 -08:00
update.c Merge branches 'bug.2018.11.12a', 'consolidate.2018.12.01a', 'doc.2018.11.12a', 'fixes.2018.11.12a', 'initrd.2018.11.08b', 'sil.2018.11.12a' and 'srcu.2018.11.27a' into HEAD 2018-12-01 12:43:16 -08:00