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Paul E. McKenney a26ac2455f rcu: move TREE_RCU from softirq to kthread 
If RCU priority boosting is to be meaningful, callback invocation must
be boosted in addition to preempted RCU readers.  Otherwise, in presence
of CPU real-time threads, the grace period ends, but the callbacks don't
get invoked.  If the callbacks don't get invoked, the associated memory
doesn't get freed, so the system is still subject to OOM.

But it is not reasonable to priority-boost RCU_SOFTIRQ, so this commit
moves the callback invocations to a kthread, which can be boosted easily.

Also add comments and properly synchronized all accesses to
rcu_cpu_kthread_task, as suggested by Lai Jiangshan.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
 		2011-05-05 23:16:54 -07:00
..
Documentation perf evlist: New command to list the names of events present in a perf.data file 2011-03-15 11:10:48 -03:00
arch [S390] perf: add DWARF register lookup for s390 2011-01-05 12:47:31 +01:00
bench perf tool: Fix gcc 4.6.0 issues 2011-02-07 12:41:41 -02:00
python perf evlist: Store pointer to the cpu and thread maps 2011-01-31 12:40:52 -02:00
scripts perf script: Finish the rename from trace to script 2010-12-25 11:29:02 -02:00
util rcu: move TREE_RCU from softirq to kthread 2011-05-05 23:16:54 -07:00
.gitignore perf tools: Makefile: Remove various and sundry cruft 2011-02-18 07:43:06 -02:00
CREDITS perf_counter tools: Add CREDITS file for Git contributors 2009-06-24 19:54:29 +02:00
MANIFEST perf packaging: add memcpy to perf MANIFEST 2010-11-30 23:00:10 -02:00
Makefile perf tools: Fix NO_NEWT=1 python build error 2011-03-29 16:46:57 -03:00
builtin-annotate.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-bench.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-buildid-cache.c perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
builtin-buildid-list.c Merge commit 'v2.6.37-rc8' into perf/core 2011-01-04 08:08:54 +01:00
builtin-diff.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-evlist.c perf evlist: New command to list the names of events present in a perf.data file 2011-03-15 11:10:48 -03:00
builtin-help.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-inject.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-kmem.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-kvm.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-list.c perf list: Allow filtering list of events 2011-02-17 15:38:58 -02:00
builtin-lock.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-probe.c perf probe: Use %td for pointer arithmetic result 2011-01-31 19:45:38 -02:00
builtin-record.c perf evsel: Fix use of inherit 2011-04-15 12:52:28 -03:00
builtin-report.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-sched.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-script.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-stat.c perf evsel: Fix use of inherit 2011-04-15 12:52:28 -03:00
builtin-test.c perf evsel: Fix use of inherit 2011-04-15 12:52:28 -03:00
builtin-timechart.c perf session: Pass evsel in event_ops->sample() 2011-03-23 19:28:58 -03:00
builtin-top.c perf evsel: Fix use of inherit 2011-04-15 12:52:28 -03:00
builtin.h perf evlist: New command to list the names of events present in a perf.data file 2011-03-15 11:10:48 -03:00
command-list.txt perf evlist: New command to list the names of events present in a perf.data file 2011-03-15 11:10:48 -03:00
design.txt perf: Fix few typos + cosmetics 2010-01-13 17:39:44 +01:00
feature-tests.mak perf tools: Remove hardcoded include paths for elfutils 2010-11-19 16:38:04 -02:00
perf-archive.sh perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
perf.c perf evlist: New command to list the names of events present in a perf.data file 2011-03-15 11:10:48 -03:00
perf.h perf record: Move perf_mmap__write_tail to perf.h 2011-01-22 19:56:29 -02:00