x27;!list_empty()' check completely
and decrease 'spu_gang_remove_ctx()' function size, and (sometimes)
avoid branch predictor misses.
Signed-off-by: Yury Norov
---
arch/powerpc/platforms/cell/spufs/gang.c | 8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git
Fix opencoded find_and_{set,clear}_bit() by using dedicated functions.
Signed-off-by: Yury Norov
---
arch/powerpc/mm/book3s32/mmu_context.c | 10 ++---
arch/powerpc/platforms/pasemi/dma_lib.c| 45 +-
arch/powerpc/platforms/powernv/pci-sriov.c | 12 ++
3 files
h'.
All users of find_bit() API, where heavy concurrency is expected,
are encouraged to switch to atomic find_and_bit() as appropriate.
Signed-off-by: Yury Norov
---
include/linux/find.h | 289 +++
lib/find_bit.c | 85 +
2 files chan
nel. They can be applied
separately from each other on per-subsystems basis, or I can pull them
in bitmap tree, as appropriate.
[1]
https://lore.kernel.org/lkml/634f5fdf-e236-42cf-be8d-48a581c21...@alu.unizg.hr/T/#m3e7341eb3571753f3acf8fe166f3fb5b2c12e615
Yury Norov (34):
lib/find: add atom
of:
[1]
https://lore.kernel.org/lkml/20220905230820.3295223-4-yury.no...@gmail.com/T/#m96ffe122721893471fd3470d911a8f2fad6d03b3
Reported-by: Stephen Rothwell
Signed-off-by: Yury Norov
---
arch/powerpc/kernel/head_64.S | 4
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kernel/head_64.S
On Wed, Sep 21, 2022 at 08:20:06AM +1000, Stephen Rothwell wrote:
> Hi Yury,
>
> On Tue, 20 Sep 2022 08:29:35 -0700 Yury Norov wrote:
> >
>
> > diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
> > index cf2c08902c05..7cb97881635e 100644
of:
[1]
https://lore.kernel.org/lkml/20220905230820.3295223-4-yury.no...@gmail.com/T/#m96ffe122721893471fd3470d911a8f2fad6d03b3
Reported-by: Stephen Rothwell
Signed-off-by: Yury Norov
---
v2: move "lwz r7,0(r7)" under #else conditional.
arch/powerpc/kernel/head_64.S | 4
1 file chang
ome treewide-cleanup
> experience might share some wisdom about what the best timing usually
> winds up being, I'm all ears.
>
> Please take a look! The number of lines touched is quite small, so this
> should be reviewable, and as much as is possible has been pushed into
>
t; While the patches are being posted together in a series since they're
> for two different architectures they don't necessarily need to go
> through the same tree.
Acked-by: Yury Norov
On Fri, Oct 28, 2022 at 09:48:28AM +0200, Andrew Jones wrote:
> Hi x86 maintainers,
>
> I realize 78e5a3399421 has now been reverted, so this fix is no longer
> urgent. I don't believe it's wrong, though, so if it's still of interest,
> then please consider this a friendly ping.
>
> Thanks,
> dre
On Fri, Oct 28, 2022, 10:03 AM Borislav Petkov wrote:
> On Fri, Oct 28, 2022 at 07:46:08AM -0700, Yury Norov wrote:
> > I'll take it in bitmap-for-next this weekend.
>
> Why?
Because it's related to bitmap API usage and has been revealed after some
work in bitmaps.
Use find_and_{set,clear}_bit() where appropriate and simplify the logic.
Signed-off-by: Yury Norov
---
arch/powerpc/mm/book3s32/mmu_context.c | 10 ++---
arch/powerpc/platforms/pasemi/dma_lib.c| 45 +-
arch/powerpc/platforms/powernv/pci-sriov.c | 12 ++
3 files
atch #13: keep test against stimer->config.enable @ Vitaly Kuznetsov;
- Patch #15: use find_and_set_next_bit @ Bart Van Assche;
- Patch #31: edit commit message @ Tony Lu, Alexandra Winter;
- Patch #35: edit tag @ John Paul Adrian Glaubitz;
Yury Norov (35):
lib/find: add atomic find_bit() primi
or_each'.
All users of find_bit() API, where heavy concurrency is expected,
are encouraged to switch to atomic find_and_bit() as appropriate.
CC: Bart Van Assche
CC: Sergey Shtylyov
Signed-off-by: Yury Norov
---
include/linux/find.h | 293 +++
lib/fin
Add basic functionality test for new API.
Signed-off-by: Yury Norov
---
lib/test_bitmap.c | 61 +++
1 file changed, 61 insertions(+)
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 65f22c2578b0..277e1ca9fd28 100644
--- a/lib/test_bitmap.c
On Mon, Dec 04, 2023 at 07:51:01PM +0100, Jan Kara wrote:
> Hello Yury!
>
> On Sun 03-12-23 11:23:47, Yury Norov wrote:
> > Add helpers around test_and_{set,clear}_bit() that allow to search for
> > clear or set bits and flip them atomically.
> >
> > The t
Use find_and_{set,clear}_bit() where appropriate and simplify the logic.
Signed-off-by: Yury Norov
---
arch/powerpc/mm/book3s32/mmu_context.c | 10 ++---
arch/powerpc/platforms/pasemi/dma_lib.c| 45 +-
arch/powerpc/platforms/powernv/pci-sriov.c | 12 ++
3 files
@ Vitaly Kuznetsov, Sean Christopherson;
Yury Norov (35):
lib/find: add atomic find_bit() primitives
lib/find: add test for atomic find_bit() ops
lib/sbitmap; optimize __sbitmap_get_word() by using find_and_set_bit()
watch_queue: optimize post_one_notification() by using
find_and_
Add basic functionality test for new API.
Signed-off-by: Yury Norov
---
lib/test_bitmap.c | 61 +++
1 file changed, 61 insertions(+)
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 65f22c2578b0..277e1ca9fd28 100644
--- a/lib/test_bitmap.c
tion with 'for_each'.
CC: Bart Van Assche
CC: Sergey Shtylyov
Signed-off-by: Yury Norov
---
include/linux/find.h | 293 +++
lib/find_bit.c | 85 +
2 files changed, 378 insertions(+)
diff --git a/include/linux/find.h b/include
On Mon, Dec 11, 2023 at 06:27:14PM -0800, Yury Norov wrote:
> Add helpers around test_and_{set,clear}_bit() that allow to search for
> clear or set bits and flip them atomically.
>
> The target patterns may look like this:
>
> for (idx = 0; idx < nbits; idx+
On Fri, Jan 19, 2024 at 11:32:27AM +0800, Huang Shijie wrote:
> hZ7bkEvc+Z19RHkS/HVG3KMg
> X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM8PR01MB7144
> Status: O
> Content-Length: 3779
> Lines: 126
>
> During the kernel booting, the generic cpu_to_node() is called too early in
> arm64, power
On Fri, Jan 19, 2024 at 04:50:53PM +0800, Shijie Huang wrote:
>
> 在 2024/1/19 16:42, Mike Rapoport 写道:
> > On Fri, Jan 19, 2024 at 02:46:16PM +0800, Shijie Huang wrote:
> > > 在 2024/1/19 12:42, Yury Norov 写道:
> > > > This adds another level of indirectio
On Wed, Jan 24, 2024 at 09:19:00AM -0800, Lameter, Christopher wrote:
> On Tue, 23 Jan 2024, Huang Shijie wrote:
>
> > During the kernel booting, the generic cpu_to_node() is called too early in
> > arm64, powerpc and riscv when CONFIG_NUMA is enabled.
> >
> > For arm64/powerpc/riscv, there are a
On Mon, Feb 12, 2024 at 08:56:32AM +0100, Herve Codina wrote:
> The bitmap_onto() function translates one bitmap relative to another but
> no function are present to perform the reverse translation.
>
> Introduce bitmap_off() to fill this hole.
>
> Signed-off-by: Herve Codina
> ---
> include/li
On Mon, Feb 12, 2024 at 10:37:18AM -0800, Yury Norov wrote:
> On Mon, Feb 12, 2024 at 08:56:32AM +0100, Herve Codina wrote:
> > The bitmap_onto() function translates one bitmap relative to another but
> > no function are present to perform the reverse translation.
> >
>
On Mon, Feb 12, 2024 at 04:36:36PM +0200, Andy Shevchenko wrote:
> On Mon, Feb 12, 2024 at 03:20:22PM +0100, Herve Codina wrote:
> > On Mon, 12 Feb 2024 16:01:38 +0200
> > Andy Shevchenko wrote:
>
> ...
>
> > Agree, the bitmap_onto() code is simpler to understand than its help.
> >
> > I introd
On Thu, Feb 22, 2024 at 05:49:59PM +0100, Herve Codina wrote:
> Hi Andy, Yury,
>
> On Thu, 22 Feb 2024 17:39:27 +0200
> Andy Shevchenko wrote:
>
> ...
> > > + * bitmap_scatter() for the bitmap scatter detailed operations).
> >
> > > + * Suppose scattered computed using bitmap_scatter(scattere
that.
Signed-off-by: Yury Norov
---
include/linux/topology.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/topology.h b/include/linux/topology.h
index fea32377f7c7..7e0d8f8f5a39 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -39,9
Use node_has_cpus() as more efficient alternative to nr_cpus_node()
where possible.
Signed-off-by: Yury Norov
---
arch/powerpc/platforms/cell/spu_priv1_mmio.c | 2 +-
arch/powerpc/platforms/cell/spufs/sched.c| 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc
On Wed, Mar 06, 2024 at 09:07:20AM +0100, Herve Codina wrote:
> QMC channels support runtime timeslots changes but nothing is done at
> the QMC HDLC driver to handle these changes.
>
> Use existing IFACE ioctl in order to configure the timeslots to use.
>
> Signed-off-by: Herve Codina
> Reviewed
t; bitmap_gather() can the seen as the reverse bitmap_scatter() operation.
>
> Signed-off-by: Andy Shevchenko
> Link:
> https://lore.kernel.org/lkml/20230926052007.3917389-3-andriy.shevche...@linux.intel.com/
> Co-developed-by: Herve Codina
> Signed-off-by: Herve Codina
Signed
On Wed, Mar 06, 2024 at 09:07:17AM +0100, Herve Codina wrote:
> The QMC HDLC driver provides support for HDLC using the QMC (QUICC
> Multichannel Controller) to transfer the HDLC data.
>
> Signed-off-by: Herve Codina
> Reviewed-by: Christophe Leroy
> Acked-by: Jakub Kicinski
> Reviewed-by: Andy
On Thu, Mar 7, 2024, 2:31 AM Herve Codina wrote:
> Hi Yury,
>
> On Wed, 6 Mar 2024 15:39:06 +0200
> Andy Shevchenko wrote:
>
> > On Wed, Mar 06, 2024 at 05:11:19AM -0800, Yury Norov wrote:
> > > On Wed, Mar 06, 2024 at 09:07:19AM +0100, Herve Codina wrote:
>
On Thu, Nov 03, 2022 at 04:34:04PM +0100, Andrew Jones wrote:
> On Thu, Nov 03, 2022 at 04:02:12PM +0100, Borislav Petkov wrote:
> > On Thu, Nov 03, 2022 at 01:59:45PM +0100, Andrew Jones wrote:
> > > The patch I'm proposing ensures cpumask_next()'s range, which is actually
> > > [-1, nr_cpus_ids -
On Thu, Nov 03, 2022 at 05:49:06PM +0100, Borislav Petkov wrote:
> On Thu, Nov 03, 2022 at 09:30:54AM -0700, yury.no...@gmail.com wrote:a
> > Callers should pass sane arguments into internal functions if they
> > expect sane output.
>
> What internal function? It's in a global header.
>
> > The A
id cpu range"."),
> will generate a warning when DEBUG_PER_CPU_MAPS is enabled each time
> /proc/cpuinfo is read. Future-proof cpuinfo by checking its input to
> cpumask_next() is valid.
>
> Signed-off-by: Andrew Jones
> Cc: Yury Norov
Reviewed-by: Yury Norov
> ---
Hi all,
I found the power pc build broken on today's
linux-next (647060f3b592).
My compiler is:
yury:linux$ powerpc-linux-gnu-gcc --version
powerpc-linux-gnu-gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copyi
On Wed, Jan 20, 2021 at 10:10 PM Randy Dunlap wrote:
>
> On 1/20/21 1:29 PM, Yury Norov wrote:
> > Hi all,
> >
> > I found the power pc build broken on today's
> > linux-next (647060f3b592).
>
> Darn, I was building linux-5.11-rc4.
>
> I'll try
ov/linux/commit/b269e51eee66ffec3008a3effb12363b91754e49
it causes build break.
This patch restores current_thread_info().
Signed-off-by: Yury Norov
---
arch/powerpc/include/asm/thread_info.h | 6 ++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/include/asm/thread_info.h
b/arch/powe
On Tue, May 07, 2019 at 11:58:56PM +0100, Al Viro wrote:
> On Tue, May 07, 2019 at 03:51:21PM -0700, Yury Norov wrote:
> > Commit ed1cd6deb013 ("powerpc: Activate CONFIG_THREAD_INFO_IN_TASK")
> > removes the function current_thread_info(). It's wrong because the
&g
Now as we have bitmap_weight_eq(), switch bitmap_full() and
bitmap_empty() to using it.
Signed-off-by: Yury Norov
---
include/linux/bitmap.h | 26 ++
1 file changed, 10 insertions(+), 16 deletions(-)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index
his patch adds new bitmap_weight_{eq,gt,le} functions to allow this
optimization, and the following patches apply them where appropriate.
Signed-off-by: Yury Norov
---
include/linux/bitmap.h | 33 ++
lib/bitmap.c | 63 ++
2 fi
ith corresponding wrappers in cpumask and nodemask.
Yury Norov (9):
lib/bitmap: add bitmap_weight_{eq,gt,le}
lib/bitmap: implement bitmap_{empty,full} with bitmap_weight_eq()
all: replace bitmap_weigth() with bitmap_{empty,full,eq,gt,le}
tools: sync bitmap_weight() usage with the kernel
appropriate.
In some places driver code has been optimized further, where it's
trivial.
Signed-off-by: Yury Norov
---
arch/nds32/kernel/perf_event_cpu.c | 4 +---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 4 ++--
arch/x86/kvm/hyperv.c
replace bitmap_weight() where appropriate.
Signed-off-by: Yury Norov
---
tools/include/linux/bitmap.h | 42 +++--
tools/lib/bitmap.c | 60
tools/perf/builtin-c2c.c | 4 +--
tools/perf/util/pmu.c| 2 +-
4 files changed, 96
Add cpumask_weight_{eq,gt,le} and replace cpumask_weight() with one
of cpumask_weight_{empty,eq,gt,le} where appropriate. This allows
cpumask_weight_*() to return earlier depending on the condition.
Signed-off-by: Yury Norov
---
arch/alpha/kernel/process.c | 2 +-
arch/ia64/kernel
Add nodemask_weight_{eq,gt,le} and replace nodemask_weight() where
appropriate. This allows nodemask_weight_*() to return earlier
depending on the condition.
Signed-off-by: Yury Norov
---
arch/x86/mm/amdtopology.c| 2 +-
arch/x86/mm/numa_emulation.c | 4 ++--
drivers/acpi/numa/srat.c
Add num_{possible,present,active}_cpus_{eq,gt,le} and replace num_*_cpus()
with one of new functions where appropriate. This allows num_*_cpus_*()
to return earlier depending on the condition.
Signed-off-by: Yury Norov
---
arch/arc/kernel/smp.c | 2 +-
arch/arm/kernel
Add num_node_state_eq() and replace num_node_state() with it in
page_alloc_init().
Signed-off-by: Yury Norov
---
include/linux/nodemask.h | 5 +
mm/page_alloc.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
cpumask and nodemask APIs are thin wrappers around basic bitmap API, and
corresponding files are not formally maintained. This patch adds them to
BITMAP_API section, so that bitmap folks would have closer look at it.
Signed-off-by: Yury Norov
---
MAINTAINERS | 4
1 file changed, 4
On Sun, Nov 28, 2021 at 05:37:19AM +0100, Michał Mirosław wrote:
> On Sat, Nov 27, 2021 at 07:56:57PM -0800, Yury Norov wrote:
> > Now as we have bitmap_weight_eq(), switch bitmap_full() and
> > bitmap_empty() to using it.
> [...]
> > -static inline bool bitmap_empty(
(restore CC list)
On Sun, Nov 28, 2021 at 05:56:51AM +0100, Michał Mirosław wrote:
> On Sat, Nov 27, 2021 at 07:57:02PM -0800, Yury Norov wrote:
> > Add num_{possible,present,active}_cpus_{eq,gt,le} and replace num_*_cpus()
> > with one of new functions where appropriate. This all
On Sun, Nov 28, 2021 at 09:07:52AM -0800, Joe Perches wrote:
> On Sat, 2021-11-27 at 19:57 -0800, Yury Norov wrote:
> > Add num_{possible,present,active}_cpus_{eq,gt,le} and replace num_*_cpus()
> > with one of new functions where appropriate. This allows num_*_cpus_*()
> &
On Sun, Nov 28, 2021 at 12:54:00PM -0500, Dennis Zhou wrote:
> Hello,
>
> On Sun, Nov 28, 2021 at 09:43:20AM -0800, Yury Norov wrote:
> > On Sun, Nov 28, 2021 at 09:07:52AM -0800, Joe Perches wrote:
> > > On Sat, 2021-11-27 at 19:57 -0800, Yury Norov wrote:
> >
On Sun, Nov 28, 2021 at 09:08:41PM +1000, Nicholas Piggin wrote:
> Excerpts from Yury Norov's message of November 28, 2021 1:56 pm:
> > In many cases people use bitmap_weight()-based functions like this:
> >
> > if (num_present_cpus() > 1)
> > do_something();
> >
> > This may take
On Sun, Nov 28, 2021 at 07:03:41PM +0100, mirq-t...@rere.qmqm.pl wrote:
> On Sat, Nov 27, 2021 at 07:56:55PM -0800, Yury Norov wrote:
> > In many cases people use bitmap_weight()-based functions like this:
> >
> > if (num_present_cpus() > 1)
> > do_
On Mon, Nov 29, 2021 at 04:34:07PM +, Michał Mirosław wrote:
> Dnia 29 listopada 2021 06:38:39 UTC, Yury Norov
> napisał/a:
> >On Sun, Nov 28, 2021 at 07:03:41PM +0100, mirq-t...@rere.qmqm.pl wrote:
> >> On Sat, Nov 27, 2021 at 07:56:55PM -0800, Yury Norov wrote:
> &
On Sun, Nov 28, 2021 at 10:10 AM Michał Mirosław
wrote:
>
> On Sat, Nov 27, 2021 at 07:56:57PM -0800, Yury Norov wrote:
> > Now as we have bitmap_weight_eq(), switch bitmap_full() and
> > bitmap_empty() to using it.
> >
> > Signed-off-by: Yury Norov
> >
On Wed, Dec 15, 2021 at 12:41 AM David Laight wrote:
>
> From: Yury Norov
> > Sent: 14 December 2021 19:43
> ...
> >
> > I think that for long bitmaps the most time consuming operation is moving
> > data to L1, and for short bitmaps the difference between ap
Don't call bitmap_weight() if the following code can get by
without it.
Signed-off-by: Yury Norov
---
drivers/net/dsa/b53/b53_common.c | 6 +-
drivers/net/ethernet/broadcom/bcmsysport.c | 6 +-
drivers/thermal/intel/intel_powerclamp.c | 9 +++--
3 files chang
ixes around bit counting that spotted my eyes.
Yury Norov (17):
all: don't use bitmap_weight() where possible
drivers: rename num_*_cpus variables
fix open-coded for_each_set_bit()
all: replace bitmap_weight with bitmap_empty where appropriate
all: replace cpumask_weight with cpu
Some drivers declare num_active_cpus and num_present_cpus,
despite that kernel has macros with corresponding names in
linux/cpumask.h, and the drivers include cpumask.h
The following patches switch num_*_cpus() to real functions,
which causes build failures for the drivers.
Signed-off-by: Yury
Mellanox driver has an open-coded for_each_set_bit(). Fix it.
Signed-off-by: Yury Norov
---
drivers/net/ethernet/mellanox/mlx4/cmd.c | 23 ++-
1 file changed, 6 insertions(+), 17 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c
b/drivers/net/ethernet
ff-by: Yury Norov
---
arch/nds32/kernel/perf_event_cpu.c | 2 +-
arch/x86/kvm/hyperv.c | 8
drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c| 2 +-
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c| 4 ++--
driver
.
Signed-off-by: Yury Norov
---
arch/alpha/kernel/process.c| 2 +-
arch/ia64/kernel/setup.c | 2 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 14 +++---
arch/x86/mm/mmio-mod.c | 2 +-
arch/x86/platform/uv/uv_nmi.c | 2 +-
drivers/cpufreq/qcom
Kernel code calls nodes_weight() to check if any bit of a given nodemask is
set. We can do it more efficiently with nodes_empty() because nodes_empty()
stops traversing the nodemask as soon as it finds first set bit, while
nodes_weight() counts all bits unconditionally.
Signed-off-by: Yury Norov
ier.
This patch adds new bitmap_weight_cmp() as suggested by Michał Mirosław
and a family of eq, gt, ge, lt and le wrappers to allow this optimization.
The following patches apply new functions where appropriate.
Suggested-by: "Michał Mirosław" (for
bitmap_weight_cmp)
Signed-off-b
conditional versions where possible,
except for small bitmaps which size is not configurable and known at
constant time. In that case conditional version of bitmap_weight would not
benefit due to small_const_nbits() optimization; but readability may
suffer.
Signed-off-by: Yury Norov
---
arch/x86/kernel
Kernel code calls cpumask_weight() to compare the weight of cpumask with
a given number. We can do it more efficiently with cpumask_weight_{eq, ...}
because conditional cpumask_weight may stop traversing the cpumask earlier,
as soon as condition is met.
Signed-off-by: Yury Norov
---
arch/ia64
Kernel code calls nodes_weight() to compare the weight of nodemask with
a given number. We can do it more efficiently with nodes_weight_{eq, ...}
because conditional nodes_weight may stop traversing the nodemask earlier,
as soon as condition is met.
Signed-off-by: Yury Norov
---
drivers/acpi
-by: Yury Norov
---
include/linux/nodemask.h | 5 +
mm/page_alloc.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 197598e075e9..c5014dbf3cce 100644
--- a/include/linux/nodemask.h
+++ b/include/linux
cpu_online_mask has an associate counter of online cpus, which should be
initialized in init_cpu_online()
Fixes: 0c09ab96fc82010 (cpu/hotplug: Cache number of online CPUs)
Signed-off-by: Yury Norov
---
kernel/cpu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/cpu.c b/kernel/cpu.c
Piggin
Signed-off-by: Yury Norov
---
include/linux/cpumask.h | 30 --
kernel/cpu.c| 22 ++
2 files changed, 38 insertions(+), 14 deletions(-)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 1906e3225737..0be2504d8e4c
-by: Yury Norov
---
include/linux/cpumask.h | 25 +++--
kernel/cpu.c| 16
2 files changed, 31 insertions(+), 10 deletions(-)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 0be2504d8e4c..c2a9d15e2cbd 100644
--- a/include/linux
: Yury Norov
---
include/linux/cpumask.h | 26 +++---
kernel/cpu.c| 15 +++
2 files changed, 30 insertions(+), 11 deletions(-)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index c2a9d15e2cbd..0add872898f8 100644
--- a/include/linux
Pull bitmap_weight_{cmp,eq,gt,ge,lt,le} from mother kernel and
use where applicable.
Signed-off-by: Yury Norov
---
tools/include/linux/bitmap.h | 44
tools/lib/bitmap.c | 20
tools/perf/util/pmu.c| 2 +-
3 files changed
cpumask and nodemask APIs are thin wrappers around basic bitmap API, and
corresponding files are not formally maintained. This patch adds them to
BITMAP_API section, so that bitmap folks would have closer look at it.
Signed-off-by: Yury Norov
---
MAINTAINERS | 4
1 file changed, 4
On Sat, Dec 18, 2021 at 2:16 PM Michał Mirosław wrote:
>
> On Sat, Dec 18, 2021 at 01:19:57PM -0800, Yury Norov wrote:
> > Don't call bitmap_weight() if the following code can get by
> > without it.
> >
> > Signed-off-by: Yury Norov
> > ---
> >
PowerPC code uses cpumask_weight() to compare the weight of cpumask
with a given number. We can do it more efficiently with
cpumask_weight_{eq, ...} because conditional cpumask_weight may stop
traversing the cpumask earlier, as soon as condition is met.
Signed-off-by: Yury Norov
---
arch
qman_test_stash() calls cpumask_weight() to compare the weight of
cpumask with a given number. We can do it more efficiently with
cpumask_weight_lt because conditional cpumask_weight may stop
traversing the cpumask earlier, as soon as condition is met.
Signed-off-by: Yury Norov
---
drivers/soc
PowerPC code uses cpumask_weight() to compare the weight of cpumask with
a given number. We can do it more efficiently with cpumask_weight_{eq, ...}
because conditional cpumask_weight may stop traversing the cpumask earlier,
as soon as condition is (or can't be) met.
Signed-off-by: Yury
qman_test_stash() calls cpumask_weight() to compare the weight of cpumask
with a given number. We can do it more efficiently with cpumask_weight_lt
because conditional cpumask_weight may stop traversing the cpumask earlier,
as soon as condition is (or can't be) met.
Signed-off-by: Yury
>
> If ptrace_request()s code is used userspace will read the most
> significant u32 where it expected the least significant.
>
> Instead of duplicating ptrace_request()s code as a special case in
> the arch code, handle it here.
Hi James,
I tested arm64/ilp32 on top of, and
a special case in
> the arch code, handle it here.
>
> CC: Yury Norov
> CC: Andrey Vagin
> Reported-by: Zhou Chengming
> Signed-off-by: James Morse
> Fixes: 29000caecbe87 ("ptrace: add ability to get/set signal-blocked mask")
> ---
> LTP test case here:
function. For powerpc -
I'm not sure, and I'd like to ask powerpc people, is it safe to do same
also for that code? If so, we can completely drop kick_all_cpus_sync().
Yury Norov (2):
rcu: declare rcu_eqs_special_set() in public header
smp: introduce kick_active_cpus_sync()
arch/a
rcu_eqs_special_set() is declared only in internal header
kernel/rcu/tree.h and stubbed in include/linux/rcutiny.h.
This patch declares rcu_eqs_special_set() in include/linux/rcutree.h, so
it can be used in non-rcu kernel code.
Signed-off-by: Yury Norov
---
include/linux/rcutree.h | 1 +
1
synchronization work helps to maintain isolated state.
I've tested it with test from task isolation series on ThunderX2 for more than
10 hours (10k giga-ticks) without breaking isolation.
Signed-off-by: Yury Norov
---
arch/arm64/kernel/insn.c | 2 +-
include/linux/smp.h | 2 ++
kernel/
On Sun, Mar 25, 2018 at 12:12:43PM -0700, Paul E. McKenney wrote:
> On Sun, Mar 25, 2018 at 08:50:03PM +0300, Yury Norov wrote:
> > rcu_eqs_special_set() is declared only in internal header
> > kernel/rcu/tree.h and stubbed in include/linux/rcutiny.h.
> >
&g
On Sun, Mar 25, 2018 at 12:23:28PM -0700, Paul E. McKenney wrote:
> On Sun, Mar 25, 2018 at 08:50:04PM +0300, Yury Norov wrote:
> > kick_all_cpus_sync() forces all CPUs to sync caches by sending broadcast
> > IPI.
> > If CPU is in extended quiescent state (idle task o
On Tue, Mar 27, 2018 at 11:21:17AM +0100, Will Deacon wrote:
> On Sun, Mar 25, 2018 at 08:50:04PM +0300, Yury Norov wrote:
> > kick_all_cpus_sync() forces all CPUs to sync caches by sending broadcast
> > IPI.
> > If CPU is in extended quiescent state (idle task or nohz_full
On Mon, Mar 26, 2018 at 02:57:35PM -0400, Steven Rostedt wrote:
> On Mon, 26 Mar 2018 10:53:13 +0200
> Andrea Parri wrote:
>
> > > --- a/kernel/smp.c
> > > +++ b/kernel/smp.c
> > > @@ -724,6 +724,30 @@ void kick_all_cpus_sync(void)
> > > }
> > > EXPORT_SYMBOL_GPL(kick_all_cpus_sync);
> > >
>
On Mon, Mar 26, 2018 at 05:45:55AM -0700, Paul E. McKenney wrote:
> On Sun, Mar 25, 2018 at 11:11:54PM +0300, Yury Norov wrote:
> > On Sun, Mar 25, 2018 at 12:23:28PM -0700, Paul E. McKenney wrote:
> > > On Sun, Mar 25, 2018 at 08:50:04PM +0300, Yury Norov wrote:
> >
On Wed, Mar 28, 2018 at 06:56:17AM -0700, Paul E. McKenney wrote:
> On Wed, Mar 28, 2018 at 04:36:05PM +0300, Yury Norov wrote:
> > On Mon, Mar 26, 2018 at 05:45:55AM -0700, Paul E. McKenney wrote:
> > > On Sun, Mar 25, 2018 at 11:11:54PM +0300, Yury Norov wrote:
> > > &
On Tue, Mar 27, 2018 at 11:21:17AM +0100, Will Deacon wrote:
> On Sun, Mar 25, 2018 at 08:50:04PM +0300, Yury Norov wrote:
> > kick_all_cpus_sync() forces all CPUs to sync caches by sending broadcast
> > IPI.
> > If CPU is in extended quiescent state (idle task or nohz_full
Hi Mark,
Thank you for review.
On Tue, Apr 03, 2018 at 02:48:32PM +0100, Mark Rutland wrote:
> Hi Yury,
>
> On Sun, Apr 01, 2018 at 02:11:08PM +0300, Yury Norov wrote:
> > +/*
> > + * Flush I-cache if CPU is in extended quiescent state
> > + */
>
> This comm
delay
synchronization for it as well, and I didn't get comments from ppc
community.
v1:
https://lkml.org/lkml/2018/3/25/109
Based on next-20180405
Yury Norov (5):
arm64: entry: isb in el1_irq
arm64: entry: introduce restore_syscall_args macro
arm64: ISB early at exit fro
patch inserts isb early at el1_irq entry to avoid that chance.
Signed-off-by: Yury Norov
---
arch/arm64/kernel/entry.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index ec2ee720e33e..9c06b4b80060 100644
--- a/arch/arm64/kernel/entry.S
+++ b
storing of syscall args becomes not
only a matter of ct_user_exit.
Signed-off-by: Yury Norov
---
arch/arm64/kernel/entry.S | 37 +
1 file changed, 21 insertions(+), 16 deletions(-)
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 9c
d-off-by: Yury Norov
---
arch/arm64/kernel/entry.S | 16 +++-
arch/arm64/kernel/process.c | 7 +++
2 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index c8d9ec363ddd..b1e1c19b4432 100644
--- a/arch/arm64/k
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