* [GIT PULL tip/core/rcu] RCU commits for v5.9
@ 2020-07-14 17:27 Paul E. McKenney
2020-07-14 18:14 ` Sebastian Andrzej Siewior
2020-07-30 22:20 ` Ingo Molnar
0 siblings, 2 replies; 11+ messages in thread
From: Paul E. McKenney @ 2020-07-14 17:27 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, rcu, arnd, bigeasy, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, paulmck, peter.enderborg, rdunlap,
richard.weiyang, urezki, zou_wei, tglx
Hello, Ingo!
This pull request contains the following changes:
1. Documentation updates.
https://lore.kernel.org/lkml/20200623000923.GA25047@paulmck-ThinkPad-P72
2. Miscellaneous fixes.
https://lore.kernel.org/lkml/20200623002128.GA25456@paulmck-ThinkPad-P72
3. kfree_rcu updates.
https://lore.kernel.org/lkml/20200624201200.GA28901@paulmck-ThinkPad-P72
4. RCU tasks updates.
https://lore.kernel.org/lkml/20200623002423.GA25869@paulmck-ThinkPad-P72
5. Read-side scalability tests.
https://lore.kernel.org/lkml/20200623002941.GA26089@paulmck-ThinkPad-P72
6. SRCU updates.
https://lore.kernel.org/lkml/20200623003310.GA26539@paulmck-ThinkPad-P72
7. Torture-test updates.
https://lore.kernel.org/lkml/20200623003731.GA26717@paulmck-ThinkPad-P72
All of these have been subjected to the kbuild test robot and -next
testing, and are available in the git repository based on v5.8-rc3 at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo
for you to fetch changes up to 13625c0a4074d3bab61b1dc70a828b574255f339:
Merge branches 'doc.2020.06.29a', 'fixes.2020.06.29a', 'kfree_rcu.2020.06.29a', 'rcu-tasks.2020.06.29a', 'scale.2020.06.29a', 'srcu.2020.06.29a' and 'torture.2020.06.29a' into HEAD (2020-06-29 12:03:15 -0700)
----------------------------------------------------------------
Arnd Bergmann (1):
refperf: Work around 64-bit division
Ethon Paul (1):
srcu: Fix a typo in comment "amoritized"->"amortized"
Frederic Weisbecker (1):
tick/nohz: Narrow down noise while setting current task's tick dependency
Joel Fernandes (Google) (5):
rcu/tree: Keep kfree_rcu() awake during lock contention
rcu/tree: Skip entry into the page allocator for PREEMPT_RT
rcu/tree: Make debug_objects logic independent of rcu_head
rcuperf: Remove useless while loops around wait_event
refperf: Add a test to measure performance of read-side synchronization
Jules Irenge (2):
rcu: Replace 1 with true
rcu/rcutorture: Replace 0 with false
Lihao Liang (1):
rcu: Update comment from rsp->rcu_gp_seq to rsp->gp_seq
Madhuparna Bhowmik (1):
trace: events: rcu: Change description of rcu_dyntick trace event
Marco Elver (1):
torture: Pass --kmake-arg to all make invocations
Mauro Carvalho Chehab (10):
docs: RCU: Convert checklist.txt to ReST
docs: RCU: Convert lockdep-splat.txt to ReST
docs: RCU: Convert lockdep.txt to ReST
docs: RCU: Convert rculist_nulls.txt to ReST
docs: RCU: Convert torture.txt to ReST
docs: RCU: Convert rcuref.txt to ReST
docs: RCU: Convert stallwarn.txt to ReST
docs: RCU: Don't duplicate chapter names in rculist_nulls.rst
rcu: Fix some kernel-doc warnings
rcu: Fix a kernel-doc warnings for "count"
Paul E. McKenney (65):
doc: Timer problems can cause RCU CPU stall warnings
doc: Tasks RCU must protect instructions before trampoline
mm/mmap.c: Add cond_resched() for exit_mmap() CPU stalls
rcu: Add callbacks-invoked counters
rcu: Add comment documenting rcu_callback_map's purpose
rcu: Grace-period-kthread related sleeps to idle priority
rcu: Priority-boost-related sleeps to idle priority
rcu: No-CBs-related sleeps to idle priority
rcu: Expedited grace-period sleeps to idle priority
fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls
rcu: Remove initialized but unused rnp from check_slow_task()
rcu: Mark rcu_nmi_enter() call to rcu_cleanup_after_idle() noinstr
lockdep: Complain only once about RCU in extended quiescent state
rcu-tasks: Convert sleeps to idle priority
rcu-tasks: Make rcu_tasks_postscan() be static
rcu-tasks: Add #include of rcupdate_trace.h to update.c
rcu-tasks: Conditionally compile show_rcu_tasks_gp_kthreads()
rcu-tasks: Fix code-style issues
rcuperf: Add comments explaining the high reader overhead
torture: Add refperf to the rcutorture scripting
refperf: Add holdoff parameter to allow CPUs to come online
refperf: Hoist function-pointer calls out of the loop
refperf: Allow decimal nanoseconds
refperf: Convert nreaders to a module parameter
refperf: Provide module parameter to specify number of experiments
refperf: Dynamically allocate experiment-summary output buffer
refperf: Dynamically allocate thread-summary output buffer
refperf: Make functions static
refperf: Tune reader measurement interval
refperf: Convert reader_task structure's "start" field to int
refperf: More closely synchronize reader start times
refperf: Add warmup and cooldown processing phases
refperf: Label experiment-number column "Runs"
refperf: Output per-experiment data points
refperf: Simplify initialization-time wakeup protocol
refperf: Add read-side delay module parameter
refperf: Adjust refperf.loop default value
doc: Document rcuperf's module parameters
refperf: Change readdelay module parameter to nanoseconds
refperf: Add test for RCU Tasks Trace readers.
refperf: Add test for RCU Tasks readers
rcu-tasks: Fix synchronize_rcu_tasks_trace() header comment
refperf: Rename RCU_REF_PERF_TEST to RCU_REF_SCALE_TEST
refperf: Rename refperf.c to refscale.c and change internal names
refscale: Change --torture type from refperf to refscale
torture: Remove qemu dependency on EFI firmware
torture: Add script to smoke-test commits in a branch
rcutorture: Add races with task-exit processing
torture: Set configfile variable to current scenario
rcutorture: Handle non-statistic bang-string error messages
rcutorture: NULL rcu_torture_current earlier in cleanup code
torture: Remove whitespace from identify_qemu_vcpus output
torture: Add --allcpus argument to the kvm.sh script
torture: Create qemu-cmd in --buildonly runs
torture: Add a stop-run capability
torture: Abstract out console-log error detection
rcutorture: Check for unwatched readers
torture: Correctly summarize build-only runs
torture: Improve diagnostic for KCSAN-incapable compilers
torture: Add more tracing crib notes to kvm.sh
torture: Add kvm-tranform.sh script for qemu-cmd files
torture: Dump ftrace at shutdown only if requested
torture: Avoid duplicate specification of qemu command
torture: Remove obsolete "cd $KVM"
Merge branches 'doc.2020.06.29a', 'fixes.2020.06.29a', 'kfree_rcu.2020.06.29a', 'rcu-tasks.2020.06.29a', 'scale.2020.06.29a', 'srcu.2020.06.29a' and 'torture.2020.06.29a' into HEAD
Peter Enderborg (1):
rcu: Stop shrinker loop
Randy Dunlap (1):
kernel/rcu/tree.c: Fix kernel-doc warnings
Sebastian Andrzej Siewior (2):
rcu/tree: Use static initializer for krc.lock
srcu: Avoid local_irq_save() before acquiring spinlock_t
Uladzislau Rezki (Sony) (12):
rcu/tree: Repeat the monitor if any free channel is busy
rcu/tree: Simplify KFREE_BULK_MAX_ENTR macro
rcu/tree: Move kfree_rcu_cpu locking/unlocking to separate functions
rcu/tree: cache specified number of objects
rcu/tree: Maintain separate array for vmalloc ptrs
rcu/tiny: support vmalloc in tiny-RCU
rcu: Rename *_kfree_callback/*_kfree_rcu_offset/kfree_call_*
mm/list_lru.c: Rename kvfree_rcu() to local variant
rcu: Introduce 2 arg kvfree_rcu() interface
rcu: Support reclaim for head-less object
rcu: Introduce single argument kvfree_rcu() interface
lib/test_vmalloc.c: Add test cases for kvfree_rcu()
Wei Yang (5):
rcu: Initialize and destroy rcu_synchronize only when necessary
rcu: Simplify the calculation of rcu_state.ncpus
rcu: gp_max is protected by root rcu_node's lock
rcu: grplo/grphi just records CPU number
rcu: grpnum just records group number
Zou Wei (1):
locktorture: Use true and false to assign to bool variables
.../RCU/Design/Requirements/Requirements.rst | 7 +-
Documentation/RCU/{checklist.txt => checklist.rst} | 17 +-
Documentation/RCU/index.rst | 9 +
.../RCU/{lockdep-splat.txt => lockdep-splat.rst} | 109 ++--
Documentation/RCU/{lockdep.txt => lockdep.rst} | 12 +-
Documentation/RCU/rculist_nulls.rst | 200 ++++++
Documentation/RCU/rculist_nulls.txt | 172 -----
Documentation/RCU/{rcuref.txt => rcuref.rst} | 199 +++---
Documentation/RCU/{stallwarn.txt => stallwarn.rst} | 62 +-
Documentation/RCU/{torture.txt => torture.rst} | 117 ++--
Documentation/admin-guide/kernel-parameters.txt | 68 ++
Documentation/locking/locktorture.rst | 2 +-
MAINTAINERS | 4 +-
fs/btrfs/extent_io.c | 2 +
include/linux/rculist.h | 2 +-
include/linux/rculist_nulls.h | 2 +-
include/linux/rcupdate.h | 53 +-
include/linux/rcupdate_trace.h | 4 +-
include/linux/rcutiny.h | 20 +-
include/linux/rcutree.h | 2 +-
include/linux/torture.h | 5 +
include/trace/events/rcu.h | 19 +-
kernel/locking/lockdep.c | 4 +-
kernel/locking/locktorture.c | 14 +-
kernel/rcu/Kconfig.debug | 19 +
kernel/rcu/Makefile | 1 +
kernel/rcu/rcuperf.c | 25 +-
kernel/rcu/rcutorture.c | 119 +++-
kernel/rcu/refscale.c | 717 +++++++++++++++++++++
kernel/rcu/srcutree.c | 16 +-
kernel/rcu/tasks.h | 37 +-
kernel/rcu/tiny.c | 7 +-
kernel/rcu/tree.c | 407 ++++++++----
kernel/rcu/tree.h | 15 +-
kernel/rcu/tree_exp.h | 2 +-
kernel/rcu/tree_plugin.h | 4 +-
kernel/rcu/tree_stall.h | 9 +-
kernel/rcu/update.c | 16 +-
kernel/time/tick-sched.c | 22 +-
kernel/torture.c | 6 +-
lib/test_vmalloc.c | 103 ++-
mm/list_lru.c | 6 +-
mm/mmap.c | 1 +
net/core/sock.c | 4 +-
.../testing/selftests/rcutorture/bin/configinit.sh | 4 +-
.../selftests/rcutorture/bin/console-badness.sh | 16 +
.../testing/selftests/rcutorture/bin/functions.sh | 23 +-
tools/testing/selftests/rcutorture/bin/jitter.sh | 6 +
.../testing/selftests/rcutorture/bin/kvm-build.sh | 6 +
.../selftests/rcutorture/bin/kvm-check-branches.sh | 108 ++++
.../rcutorture/bin/kvm-recheck-refscale.sh | 71 ++
.../selftests/rcutorture/bin/kvm-recheck.sh | 20 +-
.../selftests/rcutorture/bin/kvm-test-1-run.sh | 27 +-
.../selftests/rcutorture/bin/kvm-transform.sh | 51 ++
tools/testing/selftests/rcutorture/bin/kvm.sh | 19 +-
.../selftests/rcutorture/bin/parse-console.sh | 27 +-
.../selftests/rcutorture/configs/refscale/CFLIST | 2 +
.../selftests/rcutorture/configs/refscale/CFcommon | 2 +
.../rcutorture/configs/refscale/NOPREEMPT | 18 +
.../selftests/rcutorture/configs/refscale/PREEMPT | 18 +
.../rcutorture/configs/refscale/ver_functions.sh | 16 +
61 files changed, 2395 insertions(+), 680 deletions(-)
rename Documentation/RCU/{checklist.txt => checklist.rst} (98%)
rename Documentation/RCU/{lockdep-splat.txt => lockdep-splat.rst} (54%)
rename Documentation/RCU/{lockdep.txt => lockdep.rst} (96%)
create mode 100644 Documentation/RCU/rculist_nulls.rst
delete mode 100644 Documentation/RCU/rculist_nulls.txt
rename Documentation/RCU/{rcuref.txt => rcuref.rst} (50%)
rename Documentation/RCU/{stallwarn.txt => stallwarn.rst} (88%)
rename Documentation/RCU/{torture.txt => torture.rst} (76%)
create mode 100644 kernel/rcu/refscale.c
create mode 100755 tools/testing/selftests/rcutorture/bin/console-badness.sh
create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh
create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-refscale.sh
create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-transform.sh
create mode 100644 tools/testing/selftests/rcutorture/configs/refscale/CFLIST
create mode 100644 tools/testing/selftests/rcutorture/configs/refscale/CFcommon
create mode 100644 tools/testing/selftests/rcutorture/configs/refscale/NOPREEMPT
create mode 100644 tools/testing/selftests/rcutorture/configs/refscale/PREEMPT
create mode 100644 tools/testing/selftests/rcutorture/configs/refscale/ver_functions.sh
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 17:27 [GIT PULL tip/core/rcu] RCU commits for v5.9 Paul E. McKenney
@ 2020-07-14 18:14 ` Sebastian Andrzej Siewior
2020-07-14 18:27 ` Paul E. McKenney
2020-07-30 22:20 ` Ingo Molnar
1 sibling, 1 reply; 11+ messages in thread
From: Sebastian Andrzej Siewior @ 2020-07-14 18:14 UTC (permalink / raw)
To: Paul E. McKenney
Cc: mingo, linux-kernel, rcu, arnd, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On 2020-07-14 10:27:01 [-0700], Paul E. McKenney wrote:
> Joel Fernandes (Google) (5):
> rcu/tree: Skip entry into the page allocator for PREEMPT_RT
If it is too late to drop this then I am going send a revert okay?
Sebastian
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 18:14 ` Sebastian Andrzej Siewior
@ 2020-07-14 18:27 ` Paul E. McKenney
2020-07-14 19:02 ` Sebastian Andrzej Siewior
2020-07-14 20:17 ` Uladzislau Rezki
0 siblings, 2 replies; 11+ messages in thread
From: Paul E. McKenney @ 2020-07-14 18:27 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: mingo, linux-kernel, rcu, arnd, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On Tue, Jul 14, 2020 at 08:14:26PM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-07-14 10:27:01 [-0700], Paul E. McKenney wrote:
> > Joel Fernandes (Google) (5):
> > rcu/tree: Skip entry into the page allocator for PREEMPT_RT
>
> If it is too late to drop this then I am going send a revert okay?
I believe that Ulad and Joel are working on an update.
Now that you mention it Ulad and Joel, how is this coming along?
Thanx, Paul
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 18:27 ` Paul E. McKenney
@ 2020-07-14 19:02 ` Sebastian Andrzej Siewior
2020-07-14 20:06 ` Uladzislau Rezki
2020-07-14 20:53 ` Paul E. McKenney
2020-07-14 20:17 ` Uladzislau Rezki
1 sibling, 2 replies; 11+ messages in thread
From: Sebastian Andrzej Siewior @ 2020-07-14 19:02 UTC (permalink / raw)
To: Paul E. McKenney
Cc: mingo, linux-kernel, rcu, arnd, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On 2020-07-14 11:27:32 [-0700], Paul E. McKenney wrote:
> I believe that Ulad and Joel are working on an update.
I expressed multiple times that I am unhappy with the raw_spinlock_t
which both want to keep. It is important to be future proof but at the
same time I am not sure if they know how many in-hardirq kmalloc() or
kfree() invocation we have as of today in PREEMPT_RT.
I also had a patch in my series to keep the lock/unlock path symmetrical
and it I think that I the only one that is missing it.
> Thanx, Paul
Sebastian
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 19:02 ` Sebastian Andrzej Siewior
@ 2020-07-14 20:06 ` Uladzislau Rezki
2020-07-14 20:53 ` Paul E. McKenney
1 sibling, 0 replies; 11+ messages in thread
From: Uladzislau Rezki @ 2020-07-14 20:06 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: Paul E. McKenney, mingo, linux-kernel, rcu, arnd, elver, ethp,
frederic, jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On Tue, Jul 14, 2020 at 09:02:53PM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-07-14 11:27:32 [-0700], Paul E. McKenney wrote:
> > I believe that Ulad and Joel are working on an update.
>
> I expressed multiple times that I am unhappy with the raw_spinlock_t
> which both want to keep. It is important to be future proof but at the
> same time I am not sure if they know how many in-hardirq kmalloc() or
> kfree() invocation we have as of today in PREEMPT_RT.
>
It is not about counting how many times kfree_rcu() gets called from
the hard IRQ context for RT kernel. In fact it is about breaking of
such possibility if a conversion to spinlock_t is done. Is not it?
As a result the revert would change a behavior of the API function,
that is used to accept such usage. That is a motivation.
--
Vlad Rezki
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 18:27 ` Paul E. McKenney
2020-07-14 19:02 ` Sebastian Andrzej Siewior
@ 2020-07-14 20:17 ` Uladzislau Rezki
2020-07-15 14:12 ` Paul E. McKenney
1 sibling, 1 reply; 11+ messages in thread
From: Uladzislau Rezki @ 2020-07-14 20:17 UTC (permalink / raw)
To: Paul E. McKenney
Cc: Sebastian Andrzej Siewior, mingo, linux-kernel, rcu, arnd, elver,
ethp, frederic, jbi.octave, joel, lihaoliang,
madhuparnabhowmik10, mchehab+huawei, peter.enderborg, rdunlap,
richard.weiyang, urezki, zou_wei, tglx
On Tue, Jul 14, 2020 at 11:27:32AM -0700, Paul E. McKenney wrote:
> On Tue, Jul 14, 2020 at 08:14:26PM +0200, Sebastian Andrzej Siewior wrote:
> > On 2020-07-14 10:27:01 [-0700], Paul E. McKenney wrote:
> > > Joel Fernandes (Google) (5):
> > > rcu/tree: Skip entry into the page allocator for PREEMPT_RT
> >
> > If it is too late to drop this then I am going send a revert okay?
>
> I believe that Ulad and Joel are working on an update.
>
> Now that you mention it Ulad and Joel, how is this coming along?
>
Yes. I have made a proposal with dropping the lock. I do not see
any issues by doing that. I will upload a patch soon.
--
Vlad Rezki
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 19:02 ` Sebastian Andrzej Siewior
2020-07-14 20:06 ` Uladzislau Rezki
@ 2020-07-14 20:53 ` Paul E. McKenney
2020-07-15 7:15 ` Sebastian Andrzej Siewior
1 sibling, 1 reply; 11+ messages in thread
From: Paul E. McKenney @ 2020-07-14 20:53 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: mingo, linux-kernel, rcu, arnd, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On Tue, Jul 14, 2020 at 09:02:53PM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-07-14 11:27:32 [-0700], Paul E. McKenney wrote:
> > I believe that Ulad and Joel are working on an update.
>
> I expressed multiple times that I am unhappy with the raw_spinlock_t
> which both want to keep. It is important to be future proof but at the
> same time I am not sure if they know how many in-hardirq kmalloc() or
> kfree() invocation we have as of today in PREEMPT_RT.
> I also had a patch in my series to keep the lock/unlock path symmetrical
> and it I think that I the only one that is missing it.
Are you good with giving Ulad a few days to produce his patch?
We do have at least a week or two before the merge window opens,
after all.
Thanx, Paul
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 20:53 ` Paul E. McKenney
@ 2020-07-15 7:15 ` Sebastian Andrzej Siewior
0 siblings, 0 replies; 11+ messages in thread
From: Sebastian Andrzej Siewior @ 2020-07-15 7:15 UTC (permalink / raw)
To: Paul E. McKenney
Cc: mingo, linux-kernel, rcu, arnd, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On 2020-07-14 13:53:26 [-0700], Paul E. McKenney wrote:
> Are you good with giving Ulad a few days to produce his patch?
Yes, why not.
> Thanx, Paul
Sebastian
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 20:17 ` Uladzislau Rezki
@ 2020-07-15 14:12 ` Paul E. McKenney
0 siblings, 0 replies; 11+ messages in thread
From: Paul E. McKenney @ 2020-07-15 14:12 UTC (permalink / raw)
To: Uladzislau Rezki
Cc: Sebastian Andrzej Siewior, mingo, linux-kernel, rcu, arnd, elver,
ethp, frederic, jbi.octave, joel, lihaoliang,
madhuparnabhowmik10, mchehab+huawei, peter.enderborg, rdunlap,
richard.weiyang, zou_wei, tglx
On Tue, Jul 14, 2020 at 10:17:34PM +0200, Uladzislau Rezki wrote:
> On Tue, Jul 14, 2020 at 11:27:32AM -0700, Paul E. McKenney wrote:
> > On Tue, Jul 14, 2020 at 08:14:26PM +0200, Sebastian Andrzej Siewior wrote:
> > > On 2020-07-14 10:27:01 [-0700], Paul E. McKenney wrote:
> > > > Joel Fernandes (Google) (5):
> > > > rcu/tree: Skip entry into the page allocator for PREEMPT_RT
> > >
> > > If it is too late to drop this then I am going send a revert okay?
> >
> > I believe that Ulad and Joel are working on an update.
> >
> > Now that you mention it Ulad and Joel, how is this coming along?
> >
> Yes. I have made a proposal with dropping the lock. I do not see
> any issues by doing that. I will upload a patch soon.
Looking forward to seeing it!
Thanx, Paul
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-14 17:27 [GIT PULL tip/core/rcu] RCU commits for v5.9 Paul E. McKenney
2020-07-14 18:14 ` Sebastian Andrzej Siewior
@ 2020-07-30 22:20 ` Ingo Molnar
2020-07-30 23:15 ` Paul E. McKenney
1 sibling, 1 reply; 11+ messages in thread
From: Ingo Molnar @ 2020-07-30 22:20 UTC (permalink / raw)
To: Paul E. McKenney
Cc: linux-kernel, rcu, arnd, bigeasy, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
* Paul E. McKenney <paulmck@kernel.org> wrote:
> Hello, Ingo!
>
> This pull request contains the following changes:
>
> 1. Documentation updates.
>
> https://lore.kernel.org/lkml/20200623000923.GA25047@paulmck-ThinkPad-P72
>
> 2. Miscellaneous fixes.
>
> https://lore.kernel.org/lkml/20200623002128.GA25456@paulmck-ThinkPad-P72
>
> 3. kfree_rcu updates.
>
> https://lore.kernel.org/lkml/20200624201200.GA28901@paulmck-ThinkPad-P72
>
> 4. RCU tasks updates.
>
> https://lore.kernel.org/lkml/20200623002423.GA25869@paulmck-ThinkPad-P72
>
> 5. Read-side scalability tests.
>
> https://lore.kernel.org/lkml/20200623002941.GA26089@paulmck-ThinkPad-P72
>
> 6. SRCU updates.
>
> https://lore.kernel.org/lkml/20200623003310.GA26539@paulmck-ThinkPad-P72
>
> 7. Torture-test updates.
>
> https://lore.kernel.org/lkml/20200623003731.GA26717@paulmck-ThinkPad-P72
>
> All of these have been subjected to the kbuild test robot and -next
> testing, and are available in the git repository based on v5.8-rc3 at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo
>
> for you to fetch changes up to 13625c0a4074d3bab61b1dc70a828b574255f339:
>
> Merge branches 'doc.2020.06.29a', 'fixes.2020.06.29a', 'kfree_rcu.2020.06.29a', 'rcu-tasks.2020.06.29a', 'scale.2020.06.29a', 'srcu.2020.06.29a' and 'torture.2020.06.29a' into HEAD (2020-06-29 12:03:15 -0700)
> 61 files changed, 2395 insertions(+), 680 deletions(-)
Pulled into tip:core/rcu, thanks a lot Paul!
I assume the fix Uladzislau Rezki is working on will resolve Sebastian
Andrzej Siewior's objections?
Thanks,
Ingo
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [GIT PULL tip/core/rcu] RCU commits for v5.9
2020-07-30 22:20 ` Ingo Molnar
@ 2020-07-30 23:15 ` Paul E. McKenney
0 siblings, 0 replies; 11+ messages in thread
From: Paul E. McKenney @ 2020-07-30 23:15 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, rcu, arnd, bigeasy, elver, ethp, frederic,
jbi.octave, joel, lihaoliang, madhuparnabhowmik10,
mchehab+huawei, peter.enderborg, rdunlap, richard.weiyang,
urezki, zou_wei, tglx
On Fri, Jul 31, 2020 at 12:20:57AM +0200, Ingo Molnar wrote:
>
> * Paul E. McKenney <paulmck@kernel.org> wrote:
>
> > Hello, Ingo!
> >
> > This pull request contains the following changes:
> >
> > 1. Documentation updates.
> >
> > https://lore.kernel.org/lkml/20200623000923.GA25047@paulmck-ThinkPad-P72
> >
> > 2. Miscellaneous fixes.
> >
> > https://lore.kernel.org/lkml/20200623002128.GA25456@paulmck-ThinkPad-P72
> >
> > 3. kfree_rcu updates.
> >
> > https://lore.kernel.org/lkml/20200624201200.GA28901@paulmck-ThinkPad-P72
> >
> > 4. RCU tasks updates.
> >
> > https://lore.kernel.org/lkml/20200623002423.GA25869@paulmck-ThinkPad-P72
> >
> > 5. Read-side scalability tests.
> >
> > https://lore.kernel.org/lkml/20200623002941.GA26089@paulmck-ThinkPad-P72
> >
> > 6. SRCU updates.
> >
> > https://lore.kernel.org/lkml/20200623003310.GA26539@paulmck-ThinkPad-P72
> >
> > 7. Torture-test updates.
> >
> > https://lore.kernel.org/lkml/20200623003731.GA26717@paulmck-ThinkPad-P72
> >
> > All of these have been subjected to the kbuild test robot and -next
> > testing, and are available in the git repository based on v5.8-rc3 at:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo
> >
> > for you to fetch changes up to 13625c0a4074d3bab61b1dc70a828b574255f339:
> >
> > Merge branches 'doc.2020.06.29a', 'fixes.2020.06.29a', 'kfree_rcu.2020.06.29a', 'rcu-tasks.2020.06.29a', 'scale.2020.06.29a', 'srcu.2020.06.29a' and 'torture.2020.06.29a' into HEAD (2020-06-29 12:03:15 -0700)
>
> > 61 files changed, 2395 insertions(+), 680 deletions(-)
>
> Pulled into tip:core/rcu, thanks a lot Paul!
>
> I assume the fix Uladzislau Rezki is working on will resolve Sebastian
> Andrzej Siewior's objections?
One way or another, yes. We have several options, but the nicest one
requires changes outside of RCU, so cannot be carried out in time for the
upcoming merge window. If that fails, we have other less-nice options
that -can- be confined to RCU, at least in the short term.
But one way or another, the issue that Sebastian raised will be resolved.
Thanx, Paul
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2020-07-30 23:15 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-14 17:27 [GIT PULL tip/core/rcu] RCU commits for v5.9 Paul E. McKenney
2020-07-14 18:14 ` Sebastian Andrzej Siewior
2020-07-14 18:27 ` Paul E. McKenney
2020-07-14 19:02 ` Sebastian Andrzej Siewior
2020-07-14 20:06 ` Uladzislau Rezki
2020-07-14 20:53 ` Paul E. McKenney
2020-07-15 7:15 ` Sebastian Andrzej Siewior
2020-07-14 20:17 ` Uladzislau Rezki
2020-07-15 14:12 ` Paul E. McKenney
2020-07-30 22:20 ` Ingo Molnar
2020-07-30 23:15 ` Paul E. McKenney
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