Commit 0e247386 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

Merge branches 'doc.2019.12.10a', 'exp.2019.12.09a', 'fixes.2020.01.24a',... 

Merge branches 'doc.2019.12.10a', 'exp.2019.12.09a', 'fixes.2020.01.24a', 'kfree_rcu.2020.01.24a', 'list.2020.01.10a', 'preempt.2020.01.24a' and 'torture.2019.12.09a' into HEAD

doc.2019.12.10a: Documentations updates
exp.2019.12.09a: Expedited grace-period updates
fixes.2020.01.24a: Miscellaneous fixes
kfree_rcu.2020.01.24a: Batch kfree_rcu() work
list.2020.01.10a: RCU-protected-list updates
preempt.2020.01.24a: Preemptible RCU updates
torture.2019.12.09a: Torture-test updates
parents 6e6eca2e df1e849a f6105fc2 189a6883 afa47fdf 5b14557b b22eb7ce

.mailmap

+4 −0
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@@ -207,6 +207,10 @@ Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> 
Patrick Mochel <mochel@digitalimplant.org>

Patrick Mochel <mochel@digitalimplant.org>

Paul Burton <paulburton@kernel.org> <paul.burton@imgtec.com>

Paul Burton <paulburton@kernel.org> <paul.burton@imgtec.com>

Paul Burton <paulburton@kernel.org> <paul.burton@mips.com>

Paul Burton <paulburton@kernel.org> <paul.burton@mips.com>

Paul E. McKenney <paulmck@kernel.org> <paulmck@linux.ibm.com>

Paul E. McKenney <paulmck@kernel.org> <paulmck@linux.vnet.ibm.com>

Paul E. McKenney <paulmck@kernel.org> <paul.mckenney@linaro.org>

Paul E. McKenney <paulmck@kernel.org> <paulmck@us.ibm.com>

Peter A Jonsson <pj@ludd.ltu.se>

Peter A Jonsson <pj@ludd.ltu.se>

Peter Oruba <peter@oruba.de>

Peter Oruba <peter@oruba.de>

Peter Oruba <peter.oruba@amd.com>

Peter Oruba <peter.oruba@amd.com>

Documentation/RCU/stallwarn.txt

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@@ -225,18 +225,13 @@ an estimate of the total number of RCU callbacks queued across all CPUs 
In kernels with CONFIG_RCU_FAST_NO_HZ, more information is printed

In kernels with CONFIG_RCU_FAST_NO_HZ, more information is printed

for each CPU:

for each CPU:





	0: (64628 ticks this GP) idle=dd5/3fffffffffffffff/0 softirq=82/543 last_accelerate: a345/d342 Nonlazy posted: ..D

	0: (64628 ticks this GP) idle=dd5/3fffffffffffffff/0 softirq=82/543 last_accelerate: a345/d342 dyntick_enabled: 1





The "last_accelerate:" prints the low-order 16 bits (in hex) of the

The "last_accelerate:" prints the low-order 16 bits (in hex) of the

jiffies counter when this CPU last invoked rcu_try_advance_all_cbs()

jiffies counter when this CPU last invoked rcu_try_advance_all_cbs()

from rcu_needs_cpu() or last invoked rcu_accelerate_cbs() from

from rcu_needs_cpu() or last invoked rcu_accelerate_cbs() from

rcu_prepare_for_idle().  The "Nonlazy posted:" indicates lazy-callback

rcu_prepare_for_idle(). "dyntick_enabled: 1" indicates that dyntick-idle

status, so that an "l" indicates that all callbacks were lazy at the start

processing is enabled.

of the last idle period and an "L" indicates that there are currently

no non-lazy callbacks (in both cases, "." is printed otherwise, as

shown above) and "D" indicates that dyntick-idle processing is enabled

("." is printed otherwise, for example, if disabled via the "nohz="

kernel boot parameter).





If the grace period ends just as the stall warning starts printing,

If the grace period ends just as the stall warning starts printing,

there will be a spurious stall-warning message, which will include

there will be a spurious stall-warning message, which will include

Documentation/admin-guide/kernel-parameters.txt

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@@ -3978,6 +3978,19 @@ 
			test until boot completes in order to avoid

			test until boot completes in order to avoid

			interference.

			interference.





	rcuperf.kfree_rcu_test= [KNL]

			Set to measure performance of kfree_rcu() flooding.



	rcuperf.kfree_nthreads= [KNL]

			The number of threads running loops of kfree_rcu().



	rcuperf.kfree_alloc_num= [KNL]

			Number of allocations and frees done in an iteration.



	rcuperf.kfree_loops= [KNL]

			Number of loops doing rcuperf.kfree_alloc_num number

			of allocations and frees.



	rcuperf.nreaders= [KNL]

	rcuperf.nreaders= [KNL]

			Set number of RCU readers.  The value -1 selects

			Set number of RCU readers.  The value -1 selects

			N, where N is the number of CPUs.  A value

			N, where N is the number of CPUs.  A value

arch/powerpc/include/asm/barrier.h

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@@ -18,8 +18,6 @@ 
 * mb() prevents loads and stores being reordered across this point.

 * mb() prevents loads and stores being reordered across this point.

 * rmb() prevents loads being reordered across this point.

 * rmb() prevents loads being reordered across this point.

 * wmb() prevents stores being reordered across this point.

 * wmb() prevents stores being reordered across this point.

 * read_barrier_depends() prevents data-dependent loads being reordered

 *	across this point (nop on PPC).

 *

 *

 * *mb() variants without smp_ prefix must order all types of memory

 * *mb() variants without smp_ prefix must order all types of memory

 * operations with one another. sync is the only instruction sufficient

 * operations with one another. sync is the only instruction sufficient

drivers/net/wireless/mediatek/mt76/agg-rx.c

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@@ -281,7 +281,7 @@ void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tidno) 
{

{

	struct mt76_rx_tid *tid = NULL;

	struct mt76_rx_tid *tid = NULL;





	rcu_swap_protected(wcid->aggr[tidno], tid,

	tid = rcu_replace_pointer(wcid->aggr[tidno], tid,

				  lockdep_is_held(&dev->mutex));

				  lockdep_is_held(&dev->mutex));

	if (tid) {

	if (tid) {

		mt76_rx_aggr_shutdown(dev, tid);

		mt76_rx_aggr_shutdown(dev, tid);