linux/kernel/rcu
Paul E. McKenney d96c52fe49 rcu: Add polled expedited grace-period primitives
This commit adds expedited grace-period functionality to RCU's polled
grace-period API, adding start_poll_synchronize_rcu_expedited() and
cond_synchronize_rcu_expedited(), which are similar to the existing
start_poll_synchronize_rcu() and cond_synchronize_rcu() functions,
respectively.

Note that although start_poll_synchronize_rcu_expedited() can be invoked
very early, the resulting expedited grace periods are not guaranteed
to start until after workqueues are fully initialized.  On the other
hand, both synchronize_rcu() and synchronize_rcu_expedited() can also
be invoked very early, and the resulting grace periods will be taken
into account as they occur.

[ paulmck: Apply feedback from Neeraj Upadhyay. ]

Link: https://lore.kernel.org/all/20220121142454.1994916-1-bfoster@redhat.com/
Link: https://docs.google.com/document/d/1RNKWW9jQyfjxw2E8dsXVTdvZYh0HnYeSHDKog9jhdN8/edit?usp=sharing
Cc: Brian Foster <bfoster@redhat.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Ian Kent <raven@themaw.net>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-07-21 17:41:56 -07:00
..
Kconfig Merge branch 'exp.2022.05.11a' into HEAD 2022-05-11 11:49:35 -07:00
Kconfig.debug Merge branch 'exp.2022.05.11a' into HEAD 2022-05-11 11:49:35 -07:00
Makefile rcuperf: Change rcuperf to rcuscale 2020-08-24 18:39:24 -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
rcu.h rcu: Provide a get_completed_synchronize_rcu() function 2022-06-20 09:21:51 -07:00
rcuscale.c rcuscale: Allow rcuscale without RCU Tasks Rude/Trace 2022-04-20 16:53:19 -07:00
rcutorture.c rcutorture: Verify that polled GP API sees synchronous grace periods 2022-07-21 17:41:56 -07:00
refscale.c refscale: Allow refscale without RCU Tasks Rude/Trace 2022-04-20 16:53:19 -07:00
srcutiny.c srcu: Prevent redundant __srcu_read_unlock() wakeup 2021-11-30 17:28:16 -08:00
srcutree.c srcu: Drop needless initialization of sdp in srcu_gp_start() 2022-05-03 10:20:57 -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: Handle sparse cpu_possible_mask in rcu_tasks_invoke_cbs() 2022-04-11 17:06:43 -07:00
tiny.c rcu: Make Tiny RCU grace periods visible to polled APIs 2022-07-21 17:41:56 -07:00
tree_exp.h rcu: Add polled expedited grace-period primitives 2022-07-21 17:41:56 -07:00
tree_nocb.h rcu/nocb: Initialize nocb kthreads only for boot CPU prior SMP initialization 2022-04-11 17:05:58 -07:00
tree_plugin.h Merge branches 'docs.2022.04.20a', 'fixes.2022.04.20a', 'nocb.2022.04.11b', 'rcu-tasks.2022.04.11b', 'srcu.2022.05.03a', 'torture.2022.04.11b', 'torture-tasks.2022.04.20a' and 'torturescript.2022.04.20a' into HEAD 2022-05-03 10:21:40 -07:00
tree_stall.h printk changes for 5.19 2022-05-25 10:32:08 -07:00
tree.c rcu: Add polled expedited grace-period primitives 2022-07-21 17:41:56 -07:00
tree.h rcu: Add polled expedited grace-period primitives 2022-07-21 17:41:56 -07:00
update.c rcu: Provide a get_completed_synchronize_rcu() function 2022-06-20 09:21:51 -07:00