linux-stable/kernel/rcu
Paul E. McKenney 6c502b14ba rcu: Add full-sized polling for start_poll_expedited()
The start_poll_synchronize_rcu_expedited() API compresses the combined
expedited and normal grace-period states into a single unsigned long,
which conserves storage, but can miss grace periods in certain cases
involving overlapping normal and expedited grace periods.  Missing the
occasional grace period is usually not a problem, but there are use
cases that care about each and every grace period.

This commit therefore adds yet another member of the
full-state RCU grace-period polling API, which is the
start_poll_synchronize_rcu_expedited_full() function.  This uses up to
three times the storage (rcu_gp_oldstate structure instead of unsigned
long), but is guaranteed not to miss grace periods.

[ paulmck: Apply feedback from kernel test robot and Julia Lawall. ]

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-08-31 05:08:08 -07:00
..
Kconfig Merge branch 'ctxt.2022.07.05a' into HEAD 2022-07-21 17:46:18 -07:00
Kconfig.debug Char / Misc driver changes for 6.0-rc1 2022-08-04 11:05:48 -07:00
Makefile
rcu.h Merge branch 'ctxt.2022.07.05a' into HEAD 2022-07-21 17:46:18 -07:00
rcu_segcblist.c rcu: Clarify fill-the-gap comment in rcu_segcblist_advance() 2022-04-11 17:28:48 -07:00
rcu_segcblist.h rcu: Mark writes to the rcu_segcblist structure's ->flags field 2022-02-14 10:36:58 -08:00
rcuscale.c rcuscale: Fix smp_processor_id()-in-preemptible warnings 2022-06-21 15:57:04 -07:00
rcutorture.c rcu: Add full-sized polling for start_poll_expedited() 2022-08-31 05:08:08 -07:00
refscale.c refscale: Convert test_lock spinlock to raw_spinlock 2022-06-21 15:57:04 -07:00
srcutiny.c srcu: Prevent redundant __srcu_read_unlock() wakeup 2021-11-30 17:28:16 -08:00
srcutree.c srcu: Make expedited RCU grace periods block even less frequently 2022-07-19 11:39:59 -07:00
sync.c rcu_sync: Fix comment to properly reflect rcu_sync_exit() behavior 2022-04-20 16:51:11 -07:00
tasks.h rcu-tasks: Use delayed_work to delay rcu_tasks_verify_self_tests() 2022-06-21 15:49:38 -07:00
tiny.c rcu: Add full-sized polling for get_completed*() and poll_state*() 2022-08-31 05:08:07 -07:00
tree.c rcu: Add full-sized polling for start_poll() 2022-08-31 05:08:08 -07:00
tree.h Merge branch 'ctxt.2022.07.05a' into HEAD 2022-07-21 17:46:18 -07:00
tree_exp.h rcu: Add full-sized polling for start_poll_expedited() 2022-08-31 05:08:08 -07:00
tree_nocb.h rcu/nocb: Avoid polling when my_rdp->nocb_head_rdp list is empty 2022-07-19 11:43:55 -07:00
tree_plugin.h Merge branch 'ctxt.2022.07.05a' into HEAD 2022-07-21 17:46:18 -07:00
tree_stall.h RCU pull request for v5.20 (or whatever) 2022-08-02 19:12:45 -07:00
update.c Merge branch 'ctxt.2022.07.05a' into HEAD 2022-07-21 17:46:18 -07:00