On Thu, Aug 8, 2024 at 5:43 PM Jason Wang wrote:
>
> Barry said [1]:
>
> """
> mm doesn't support non-blockable __GFP_NOFAIL allocation. Because
> __GFP_NOFAIL without direct reclamation may just result in a busy
> loop within non-sleepable contexts.
>
> The current code will result in returning a
On Mon, Aug 5, 2024 at 8:21 PM Jason Wang wrote:
>
> Barry said [1]:
>
> """
> mm doesn't support non-blockable __GFP_NOFAIL allocation. Because
> __GFP_NOFAIL without direct reclamation may just result in a busy
> loop within non-sleepable contexts.
> ""“
the current code will result in returnin
> -Original Message-
> From: Tim Chen [mailto:tim.c.c...@linux.intel.com]
> Sent: Wednesday, April 21, 2021 6:32 AM
> To: Song Bao Hua (Barry Song) ;
> catalin.mari...@arm.com; w...@kernel.org; r...@rjwysocki.net;
> vincent.guit...@linaro.org; b...@alien8.de; t...@l
> -Original Message-
> From: Greg KH [mailto:gre...@linuxfoundation.org]
> Sent: Friday, March 19, 2021 11:02 PM
> To: Jonathan Cameron
> Cc: Song Bao Hua (Barry Song) ;
> tim.c.c...@linux.intel.com; catalin.mari...@arm.com; w...@kernel.org;
> r...@rjwyso
y change
w/domain: added cluster domain without changing wake_affine
w/domain+affine: added cluster domain, changed wake_affine
while g=6, if we use top -H to show the cpus which tasks are running on,
we can easily find couples are running in same CCL.
Signed-off-by: Barry Song
---
-v6:
* emul
: Tim Chen
Signed-off-by: Barry Song
---
-v6:
* added topology_cluster_cpumask() for x86, code provided by Tim.
arch/x86/Kconfig| 8
arch/x86/include/asm/smp.h | 7 +++
arch/x86/include/asm/topology.h | 2 ++
arch/x86/kernel/cpu/cacheinfo.c | 1 +
arch
h benefits hackbench when the load is relatively low,
while it hurts hackbench much when the load is relatively high(56 and
64 threads in 24 cores).
Signed-off-by: Barry Song
---
arch/arm64/Kconfig | 7 +++
include/linux/sched/cluster.h | 19 +++
include/l
: Jonathan Cameron
Signed-off-by: Barry Song
---
-v6:
* the topology ABI documents required by Greg is not completed yet.
will have a separate patch for that.
Documentation/admin-guide/cputopology.rst | 26 +++--
arch/arm64/kernel/topology.c | 2 +
drivers/acpi/pptt.c
#x27;s patch for x86 Jacobsville
* also added benchmark data of spreading unrelated tasks
* avoided the iteration of sched_domain by moving to static_key(addressing
Vincent's comment
* used acpi_cpu_id for acpi_find_processor_node(addressing Masa's comment)
Barry Song (2):
schedu
> -Original Message-
> From: Dietmar Eggemann [mailto:dietmar.eggem...@arm.com]
> Sent: Wednesday, January 13, 2021 12:00 AM
> To: Morten Rasmussen ; Tim Chen
>
> Cc: Song Bao Hua (Barry Song) ;
> valentin.schnei...@arm.com; catalin.mari...@arm.com; w...@kernel.org;
g
> ; w...@kernel.org; yangyicong
> ; Song Bao Hua (Barry Song)
>
> Subject: [PATCH v1 1/1] i2c: designware: Adjust bus_freq_hz when refuse high
> speed mode set
>
> When hardware doesn't support High Speed Mode, we forget bus_freq_hz
> timing adjustment. This makes the
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Wednesday, March 24, 2021 12:15 PM
> To: 'Tim Chen' ; catalin.mari...@arm.com;
> w...@kernel.org; r...@rjwysocki.net; vincent.guit...@linaro.org;
> b...@alien8.de;
> t...@linutronix.de; mi...@r
> No, please read the code carefully.
> We can duplicate conditional, but it brings a bit of inconsistency to how the
> counters are printed.
Thanks for clarification, I am still confused as the original
code print the real mode based on dev->master_cfg, the new
code is printing mode based on fr
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Wednesday, March 31, 2021 10:54 AM
> To: 'Andy Shevchenko'
> Cc: yangyicong ; w...@kernel.org;
> andriy.shevche...@linux.intel.com; linux-...@vger.kernel.org;
> sergey.se...@baikalelectronics.r
From: Andy Shevchenko [mailto:andy.shevche...@gmail.com]
Sent: Wednesday, March 31, 2021 10:57 AM
To: Song Bao Hua (Barry Song)
Cc: yangyicong ; w...@kernel.org;
andriy.shevche...@linux.intel.com; linux-...@vger.kernel.org;
sergey.se...@baikalelectronics.ru; linux-kernel@vger.kernel.org
m; tred...@nvidia.com; jarkko.nik...@linux.intel.com;
> rmk+ker...@armlinux.org.uk; Song Bao Hua (Barry Song)
> ; John Garry ;
> mika.westerb...@linux.intel.com; yangyicong ; Zengtao
> (B) ; Linuxarm
> Subject: [PATCH 5/5] i2c: designware: Switch over to i2c_freq_mode_string()
>
&g
enbrand ; David Rientjes
> ; linmiaohe ; Peter Zijlstra
> ; Matthew Wilcox ; HORIGUCHI NAOYA
> ; Aneesh Kumar K . V ;
> Waiman Long ; Peter Xu ; Mina Almasry
> ; Hillf Danton ; Joonsoo Kim
> ; Song Bao Hua (Barry Song)
> ; Will Deacon ; Andrew Morton
>
> Subject: Re: [Exter
; Muchun Song ; David Rientjes
> ; linmiaohe ; Peter Zijlstra
> ; Matthew Wilcox ; HORIGUCHI NAOYA
> ; Aneesh Kumar K . V ;
> Waiman Long ; Peter Xu ; Mina Almasry
> ; Hillf Danton ; Joonsoo Kim
> ; Song Bao Hua (Barry Song)
> ; Will Deacon ; Andrew Morton
> ; Mike Kravetz
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 0a2b65c03e9b47493e1442bf9c84badc60d9bffb
Gitweb:
https://git.kernel.org/tip/0a2b65c03e9b47493e1442bf9c84badc60d9bffb
Author:Barry Song
AuthorDate:Thu, 25 Mar 2021 15:31:40 +13:00
Committer
mask is built in build_balance_mask() by for_each_cpu(i, sg_span), so
it must be a subset of sched_group_span(sg). Though cpumask_first_and
doesn't lead to a wrong result of balance cpu, it is pointless to do
cpumask_and again.
Signed-off-by: Barry Song
Reviewed-by: Valentin Schneider
---
s.org; h...@lst.de;
> m.szyprow...@samsung.com; Song Bao Hua (Barry Song)
> ; io...@lists.linux-foundation.org;
> linux-kernel@vger.kernel.org
> Subject: Re: [PATCH] dma-mapping: make map_benchmark compile into module
>
> On Wed, Mar 24, 2021 at 10:17:38AM +0800, Tian Tao wrote:
> >
> -Original Message-
> From: tiantao (H)
> Sent: Wednesday, March 24, 2021 3:18 PM
> To: a...@linux-foundation.org; pet...@infradead.org; paul...@kernel.org;
> a...@kernel.org; t...@linutronix.de; rost...@goodmis.org; h...@lst.de;
> m.szyprow...@samsung.com; Song B
> -Original Message-
> From: Tim Chen [mailto:tim.c.c...@linux.intel.com]
> Sent: Wednesday, March 24, 2021 11:51 AM
> To: Song Bao Hua (Barry Song) ;
> catalin.mari...@arm.com; w...@kernel.org; r...@rjwysocki.net;
> vincent.guit...@linaro.org; b...@alien8.de; t...@l
The following commit has been merged into the sched/core branch of tip:
Commit-ID: c8987ae5af793a73e2c0d6ce804d8ff454ea377c
Gitweb:
https://git.kernel.org/tip/c8987ae5af793a73e2c0d6ce804d8ff454ea377c
Author:Barry Song
AuthorDate:Sun, 21 Mar 2021 11:14:32 +13:00
Committer
> -Original Message-
> From: Li, Aubrey [mailto:aubrey...@linux.intel.com]
> Sent: Monday, March 22, 2021 5:37 PM
> To: Song Bao Hua (Barry Song) ;
> vincent.guit...@linaro.org; mi...@redhat.com; pet...@infradead.org;
> juri.le...@redhat.com; dietmar.eggem...@arm.com; r
patch:
g=2 4 6 8 10 12 14
w/o: 1.8151 3.8499 5.5142 7.2491 9.0340 10.7345 12.0929
w/ : 1.8428 3.7436 5.4501 6.9522 8.2882 9.9535 11.3367
+4.1% +8.3% +7.3% +6.3%
Signed-off-by: Barry Song
---
kernel/sched/fair.c | 8 +---
1 file
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Friday, March 19, 2021 5:16 PM
> To: tim.c.c...@linux.intel.com; catalin.mari...@arm.com; w...@kernel.org;
> r...@rjwysocki.net; vincent.guit...@linaro.org; b...@alien8.de;
> t...@linutronix.de; m
> -Original Message-
> From: Greg KH [mailto:gre...@linuxfoundation.org]
> Sent: Friday, March 19, 2021 7:35 PM
> To: Song Bao Hua (Barry Song)
> Cc: tim.c.c...@linux.intel.com; catalin.mari...@arm.com; w...@kernel.org;
> r...@rjwysocki.net; vincent.guit...@linaro.o
> -Original Message-
> From: Andy Shevchenko [mailto:andy.shevche...@gmail.com]
> Sent: Tuesday, March 16, 2021 10:41 PM
> To: Johan Hovold ; Finn Thain ;
> Song Bao Hua (Barry Song)
> Cc: Krzysztof Kozlowski ; Greg
> Kroah-Hartman ; Jiri Slaby ;
> linux-arm Mail
: Tim Chen
Signed-off-by: Barry Song
---
arch/x86/Kconfig| 8
arch/x86/include/asm/smp.h | 7 +++
arch/x86/include/asm/topology.h | 1 +
arch/x86/kernel/cpu/cacheinfo.c | 1 +
arch/x86/kernel/cpu/common.c| 3 +++
arch/x86/kernel/smpboot.c | 43
ading unrelated tasks
* avoided the iteration of sched_domain by moving to static_key(addressing
Vincent's comment
* used acpi_cpu_id for acpi_find_processor_node(addressing Masa's comment)
Barry Song (2):
scheduler: add scheduler level for clusters
scheduler: scan idle cpu i
/python
#
# selectidlecpu.py select idle cpu histogram.
#
# A Ctrl-C will print the gathered histogram then exit.
#
# 18-March-2021 Barry Song Created this.
from __future__ import print_function
from bcc import BPF
from time import sleep
# load BPF program
b = BPF(text="""
BPF
142 7.2491 9.0340 10.7345 12.0929
w/ : 1.8396 3.8250 5.4780 7.3442 9.0172 10.5950 11.9113
Obviously this patch doesn't impact hackbench too much.
Signed-off-by: Barry Song
---
arch/arm64/Kconfig | 7 +++
include/linux/sched/cluster.h | 19 +++
include/linux/s
: Jonathan Cameron
Signed-off-by: Barry Song
---
Documentation/admin-guide/cputopology.rst | 26 +++--
arch/arm64/kernel/topology.c | 2 +
drivers/acpi/pptt.c | 63 +++
drivers/base/arch_topology.c | 15
> -Original Message-
> From: Peter Zijlstra [mailto:pet...@infradead.org]
> Sent: Tuesday, March 2, 2021 11:43 PM
> To: Song Bao Hua (Barry Song)
> Cc: tim.c.c...@linux.intel.com; catalin.mari...@arm.com; w...@kernel.org;
> r...@rjwysocki.net; vincent.guit...@linaro.o
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Tuesday, March 2, 2021 12:00 PM
> To: tim.c.c...@linux.intel.com; catalin.mari...@arm.com; w...@kernel.org;
> r...@rjwysocki.net; vincent.guit...@linaro.org; b...@alien8.de;
> t...@linutronix.de; m
of Andrew Morton;
Barry Song (2):
scripts/gdb: document lx_current is only supported by x86
scripts/gdb: add lx_current support for arm64
.../dev-tools/gdb-kernel-debugging.rst| 2 +-
scripts/gdb/linux/cpus.py | 23 +--
2 files changed, 22
derefrence of current task. Otherwise, lx_current() will tell users
they are running in userspace(EL0).
While arm64 is running in EL0, it is actually pointless to print current
task as the memory of kernel space is not accessible in EL0.
Signed-off-by: Barry Song
---
Documentation/dev-tools/gdb
ment it.
Cc: Jan Kiszka
Signed-off-by: Barry Song
---
Documentation/dev-tools/gdb-kernel-debugging.rst | 2 +-
scripts/gdb/linux/cpus.py| 10 --
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/Documentation/dev-tools/gdb-kernel-debugging.rst
b/Doc
> -Original Message-
> From: Tim Chen [mailto:tim.c.c...@linux.intel.com]
> Sent: Thursday, March 4, 2021 7:34 AM
> To: Peter Zijlstra ; Song Bao Hua (Barry Song)
>
> Cc: catalin.mari...@arm.com; w...@kernel.org; r...@rjwysocki.net;
> vincent.guit...@linaro.o
> -Original Message-
> From: Vincent Guittot [mailto:vincent.guit...@linaro.org]
> Sent: Tuesday, March 9, 2021 12:26 AM
> To: Song Bao Hua (Barry Song)
> Cc: Tim Chen ; Catalin Marinas
> ; Will Deacon ; Rafael J. Wysocki
> ; Borislav Petkov ; Thomas Gleixner
>
The following commit has been merged into the irq/core branch of tip:
Commit-ID: cbe16f35bee6880becca6f20d2ebf6b457148552
Gitweb:
https://git.kernel.org/tip/cbe16f35bee6880becca6f20d2ebf6b457148552
Author:Barry Song
AuthorDate:Wed, 03 Mar 2021 11:49:15 +13:00
Committer
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 585b6d2723dc927ebc4ad884c4e879e4da8bc21f
Gitweb:
https://git.kernel.org/tip/585b6d2723dc927ebc4ad884c4e879e4da8bc21f
Author:Barry Song
AuthorDate:Wed, 24 Feb 2021 16:09:44 +13:00
Committer
> -Original Message-
> From: Valentin Schneider [mailto:valentin.schnei...@arm.com]
> Sent: Saturday, March 6, 2021 12:49 AM
> To: Song Bao Hua (Barry Song) ;
> vincent.guit...@linaro.org; mi...@redhat.com; pet...@infradead.org;
> juri.le...@redhat.com; dietmar.egge
mask is built in build_balance_mask() by for_each_cpu(i, sg_span), so
it must be a subset of sched_group_span(sg). Though cpumask_first_and
doesn't lead to a wrong result of balance cpu, it is pointless to do
cpumask_and again.
Signed-off-by: Barry Song
---
kernel/sched/topology.c | 2
The following commit has been merged into the irq/core branch of tip:
Commit-ID: e749df1bbd23f4472082210650514548d8a39e9b
Gitweb:
https://git.kernel.org/tip/e749df1bbd23f4472082210650514548d8a39e9b
Author:Barry Song
AuthorDate:Wed, 03 Mar 2021 11:49:15 +13:00
Committer
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 9f4af5753b691b9df558ddcfea13e9f3036e45ca
Gitweb:
https://git.kernel.org/tip/9f4af5753b691b9df558ddcfea13e9f3036e45ca
Author:Barry Song
AuthorDate:Wed, 24 Feb 2021 16:09:44 +13:00
Committer
ither irq_set_status_flags() nor disable_irq().
In the meantime, drivers using the below pattern for NMI
irq_set_status_flags(irq, IRQ_NOAUTOEN);
request_nmi(dev, irq...);
can also move to request_nmi() with IRQF_NO_AUTOEN flag.
Cc: Dmitry Torokhov
Signed-off-by: Barry Song
---
-v5:
* add the same chec
(dev, irq...);
can also be replaced by request_irq() with IRQF_NO_AUTOEN flag.
Signed-off-by: Barry Song
---
drivers/input/keyboard/tca6416-keypad.c | 3 +--
drivers/input/keyboard/tegra-kbc.c | 5 ++---
drivers/input/touchscreen/ar1021_i2c.c | 5 +
drivers/input/touchscreen
-v5:
* add the same check for IRQF_NO_AUTOEN in request_nmi()
* combine a dozen of separate patches of input into one (hopefully
this could easy the life of the maintainers)
-v4:
* remove the irq_settings magic for NOAUTOEN with respect to
Thomas's comment
Barry Song (2):
g
Cc: Thomas Gleixner
Cc: Mauro Carvalho Chehab
Cc: Viresh Kumar
Cc: Mike Kravetz
Cc: Peter Zijlstra
Signed-off-by: Barry Song
---
Documentation/admin-guide/kernel-parameters.rst | 1 +
Documentation/admin-guide/kernel-parameters.txt | 3 ++-
2 files changed, 3 insertions(+), 1 delet
: Tim Chen
Signed-off-by: Barry Song
---
arch/x86/Kconfig| 8
arch/x86/include/asm/smp.h | 7 +++
arch/x86/include/asm/topology.h | 1 +
arch/x86/kernel/cpu/cacheinfo.c | 1 +
arch/x86/kernel/cpu/common.c| 3 +++
arch/x86/kernel/smpboot.c | 43
10 12 14
w/o: 1.9596 4.0506 5.9654 8.0068 9.8147 11.4900 13.1163
w/ : 1.9362 3.9197 5.6570 7.1376 8.5263 10.0512 11.3256
+3.3% +5.2% +10.9% +13.2% +12.8% +13.7%
Signed-off-by: Barry Song
---
-v4:
* rebased to tip/sched/core with the latest unified code of select_idle_cpu
tasks
* avoided the iteration of sched_domain by moving to static_key(addressing
Vincent's comment
* used acpi_cpu_id for acpi_find_processor_node(addressing Masa's comment)
Barry Song (1):
scheduler: add scheduler level for clusters
Jonathan Cameron (1):
topology: Represent c
: Jonathan Cameron
Signed-off-by: Barry Song
---
-v4:
* used acpi_cpu_id for acpi_find_processor_node(addressing Masa's comment)
Documentation/admin-guide/cputopology.rst | 26 +++--
arch/arm64/kernel/topology.c | 2 +
drivers/acpi/pptt.c
> -Original Message-
> From: Luo Jiaxing [mailto:luojiax...@huawei.com]
> Sent: Friday, February 26, 2021 12:39 AM
> To: nouv...@lists.freedesktop.org; dri-de...@lists.freedesktop.org;
> bske...@redhat.com
> Cc: linux-kernel@vger.kernel.org; linux...@openeuler.org; luojiaxing
>
> Subject
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Wednesday, February 24, 2021 6:21 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
=6-7 cap=6102 }, 2:{ span=0-5
mask=2-3 cap=5845 }
Reported-by: Valentin Schneider
Tested-by: Meelis Roos
Reviewed-by: Valentin Schneider
Signed-off-by: Barry Song
---
-v4:
no code changed; mainly rewrote changelog:
* add Reviewed-by of Valentin;
While the grandchild approach was started
lx_current depends on per_cpu current_task variable which exists on x86 only.
so it actually works on x86 only. the 1st patch documents this clearly; the
2nd patch adds support for arm64.
Barry Song (2):
scripts/gdb: document lx_current is only supported by x86
scripts/gdb: add lx_current
ment it.
Cc: Jan Kiszka
Signed-off-by: Barry Song
---
Documentation/dev-tools/gdb-kernel-debugging.rst | 2 +-
scripts/gdb/linux/cpus.py| 10 --
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/Documentation/dev-tools/gdb-kernel-debugging.rst
b/Doc
derefrence of current task. Otherwise, lx_current() will tell users
they are running in userspace(EL0).
While arm64 is running in EL0, it is actually pointless to print current
task as the memory of kernel space is not accessible in EL0.
Signed-off-by: Barry Song
---
Documentation/dev-tools/gdb
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Tuesday, February 23, 2021 9:30 PM
> To: 'Jan Kiszka' ; kieran.bing...@ideasonboard.com;
> cor...@lwn.net; linux-...@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org; linux...@openeuler.org
&g
> -Original Message-
> From: Jan Kiszka [mailto:jan.kis...@siemens.com]
> Sent: Tuesday, February 23, 2021 8:27 PM
> To: Song Bao Hua (Barry Song) ;
> kieran.bing...@ideasonboard.com; cor...@lwn.net; linux-...@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org; linu
> -Original Message-
> From: Anshuman Khandual [mailto:anshuman.khand...@arm.com]
> Sent: Tuesday, February 23, 2021 7:10 PM
> To: Song Bao Hua (Barry Song) ; cor...@lwn.net;
> linux-...@vger.kernel.org; a...@linux-foundation.org; linux...@kvack.org
>
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Tuesday, February 23, 2021 6:25 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
ndy Lutomirski
Cc: Catalin Marinas
Cc: Will Deacon
Signed-off-by: Barry Song
---
Documentation/features/arch-support.txt| 1 +
Documentation/features/vm/TLB/arch-support.txt | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/Documentation/features/arch-support
> -Original Message-
> From: Kieran Bingham [mailto:kieran.bing...@ideasonboard.com]
> Sent: Tuesday, February 23, 2021 12:06 AM
> To: Song Bao Hua (Barry Song) ; cor...@lwn.net;
> linux-...@vger.kernel.org; jan.kis...@siemens.com
> Cc: linux-kernel@vger
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Saturday, February 20, 2021 6:18 PM
> To: tanxiaofei
> Cc: Song Bao Hua (Barry Song) ;
> j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linu
s,
document it.
Cc: Jan Kiszka
Signed-off-by: Barry Song
---
Documentation/dev-tools/gdb-kernel-debugging.rst | 2 +-
scripts/gdb/linux/cpus.py| 10 --
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/Documentation/dev-tools/gdb-kernel-debugging.
> -Original Message-
> From: Valentin Schneider [mailto:valentin.schnei...@arm.com]
> Sent: Friday, February 19, 2021 1:41 AM
> To: Song Bao Hua (Barry Song) ; Peter Zijlstra
>
> Cc: vincent.guit...@linaro.org; mgor...@suse.de; mi...@kernel.org;
> dietmar.eggem...@a
> -Original Message-
> From: Valentin Schneider [mailto:valentin.schnei...@arm.com]
> Sent: Friday, February 12, 2021 8:55 AM
> To: Peter Zijlstra ; Song Bao Hua (Barry Song)
>
> Cc: vincent.guit...@linaro.org; mgor...@suse.de; mi...@kernel.org;
> dietmar.eggem...@a
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Sunday, February 14, 2021 6:11 PM
> To: Song Bao Hua (Barry Song)
> Cc: Arnd Bergmann ; t...@linutronix.de;
> gre...@linuxfoundation.org; a...@arndb.de; ge...@linux-m68k.org;
>
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Sunday, February 14, 2021 11:13 AM
> To: 'Arnd Bergmann'
> Cc: t...@linutronix.de; gre...@linuxfoundation.org; a...@arndb.de;
> ge...@linux-m68k.org; fun...@jurai.org; ph...@gnu.org; cor...@lwn.ne
> -Original Message-
> From: Arnd Bergmann [mailto:a...@kernel.org]
> Sent: Sunday, February 14, 2021 5:32 AM
> To: Song Bao Hua (Barry Song)
> Cc: t...@linutronix.de; gre...@linuxfoundation.org; a...@arndb.de;
> ge...@linux-m68k.org; fun...@jurai.org; ph...@gnu.o
> -Original Message-
> From: Arnd Bergmann [mailto:a...@kernel.org]
> Sent: Saturday, February 13, 2021 12:06 PM
> To: Song Bao Hua (Barry Song)
> Cc: t...@linutronix.de; gre...@linuxfoundation.org; a...@arndb.de;
> ge...@linux-m68k.org; fun...@jurai.org; ph...@gnu.o
> -Original Message-
> From: Arnd Bergmann [mailto:a...@kernel.org]
> Sent: Saturday, February 13, 2021 11:34 AM
> To: Song Bao Hua (Barry Song)
> Cc: t...@linutronix.de; gre...@linuxfoundation.org; a...@arndb.de;
> ge...@linux-m68k.org; fun...@jurai.org; ph...@gnu.o
> -Original Message-
> From: Arnd Bergmann [mailto:a...@kernel.org]
> Sent: Saturday, February 13, 2021 9:23 AM
> To: Grygorii Strashko
> Cc: Song Bao Hua (Barry Song) ; Andy Shevchenko
> ; luojiaxing ; Linus
> Walleij ; Santosh Shilimkar ;
> Kevin Hilman ;
> -Original Message-
> From: Grygorii Strashko [mailto:grygorii.stras...@ti.com]
> Sent: Saturday, February 13, 2021 3:09 AM
> To: Song Bao Hua (Barry Song) ; Andy Shevchenko
>
> Cc: Arnd Bergmann ; luojiaxing ; Linus
> Walleij ; Santosh Shilimkar ;
> Kevin
> -Original Message-
> From: Grygorii Strashko [mailto:grygorii.stras...@ti.com]
> Sent: Saturday, February 13, 2021 12:53 AM
> To: Song Bao Hua (Barry Song) ; Andy Shevchenko
>
> Cc: Arnd Bergmann ; luojiaxing ; Linus
> Walleij ; Santosh Shilimkar ;
> Kevin
> -Original Message-
> From: Andy Shevchenko [mailto:andy.shevche...@gmail.com]
> Sent: Friday, February 12, 2021 11:57 PM
> To: Song Bao Hua (Barry Song)
> Cc: Grygorii Strashko ; Arnd Bergmann
> ; luojiaxing ; Linus Walleij
> ; Santosh Shilimkar ; Kevin
>
> -Original Message-
> From: Grygorii Strashko [mailto:grygorii.stras...@ti.com]
> Sent: Friday, February 12, 2021 11:28 PM
> To: Arnd Bergmann ; Song Bao Hua (Barry Song)
>
> Cc: luojiaxing ; Linus Walleij
> ; Andy Shevchenko ; Andy
> Shevchenko ; Santosh Sh
> -Original Message-
> From: Arnd Bergmann [mailto:a...@kernel.org]
> Sent: Friday, February 12, 2021 10:45 PM
> To: Song Bao Hua (Barry Song)
> Cc: Grygorii Strashko ; luojiaxing
> ; Linus Walleij ; Andy
> Shevchenko ; Andy Shevchenko
> ; Santosh Shilimkar
> -Original Message-
> From: Oleksandr Natalenko [mailto:oleksa...@natalenko.name]
> Sent: Friday, February 12, 2021 8:43 PM
> To: Song Bao Hua (Barry Song)
> Cc: Mikhail Gavrilov ;
> sjenn...@linux.vnet.ibm.com; Linux List Kernel Mailing
> ; Linux Memory Managem
> -Original Message-
> From: Grygorii Strashko [mailto:grygorii.stras...@ti.com]
> Sent: Friday, February 12, 2021 9:17 AM
> To: Arnd Bergmann
> Cc: luojiaxing ; Linus Walleij
> ; Andy Shevchenko ; Andy
> Shevchenko ; Santosh Shilimkar
> ; Kevin Hilman ; open list:GPIO
> SUBSYSTEM , linu
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Friday, February 12, 2021 1:09 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
Hi,
I am getting a very long debate with Finn in this thread:
https://lore.kernel.org/lkml/1612697823-8073-1-git-send-email-tanxiao...@huawei.com/
In short, the debate is about if high-priority IRQs (*not NMI*)
are allowed to preempt an running IRQ handler in hardIRQ context.
In my understanding
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Friday, February 12, 2021 12:58 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Friday, February 12, 2021 12:57 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
> >
> > On Wed, 10 Feb 2021, Song Bao Hua (Barry Song) wrote:
> >
> > > > On Wed, 10 Feb 2021, Song Bao Hua (Barry Song) wrote:
> > > >
> > > > > > On Wed, 10 Feb 2021, Song Bao Hua (Barry Song) wrote:
> > > >
> -Original Message-
> From: Mikhail Gavrilov [mailto:mikhail.v.gavri...@gmail.com]
> Sent: Thursday, February 11, 2021 9:58 PM
> To: sjenn...@linux.vnet.ibm.com; Song Bao Hua (Barry Song)
>
> Cc: Linux List Kernel Mailing ; Linux Memory
> Management List
> S
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Thursday, February 11, 2021 2:12 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Thursday, February 11, 2021 11:35 AM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Thursday, February 11, 2021 7:04 AM
> To: Song Bao Hua (Barry Song)
> Cc: David Hildenbrand ; Wangzhou (B)
> ; linux-kernel@vger.kernel.org;
> io...@lists.linux-foundation.org; linux...@k
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Thursday, February 11, 2021 10:07 AM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
> -Original Message-
> From: Andy Shevchenko [mailto:andy.shevche...@gmail.com]
> Sent: Thursday, February 11, 2021 3:57 AM
> To: Song Bao Hua (Barry Song)
> Cc: luojiaxing ; Linus Walleij
> ; Grygorii Strashko ;
> Santosh Shilimkar ; Kevin Hilman ;
> open lis
> -Original Message-
> From: Peter Zijlstra [mailto:pet...@infradead.org]
> Sent: Thursday, February 11, 2021 12:22 AM
> To: Song Bao Hua (Barry Song)
> Cc: valentin.schnei...@arm.com; vincent.guit...@linaro.org; mgor...@suse.de;
> mi...@kernel.org; dietma
> -Original Message-
> From: Andy Shevchenko [mailto:andy.shevche...@gmail.com]
> Sent: Wednesday, February 10, 2021 11:51 PM
> To: luojiaxing
> Cc: Linus Walleij ; Andy Shevchenko
> ; Grygorii Strashko
> ; Santosh Shilimkar ; Kevin
> Hilman ; open list:GPIO SUBSYSTEM
> ; Linux Kernel Ma
> -Original Message-
> From: Meelis Roos [mailto:mr...@linux.ee]
> Sent: Wednesday, February 10, 2021 1:40 AM
> To: Song Bao Hua (Barry Song) ;
> valentin.schnei...@arm.com; vincent.guit...@linaro.org; mgor...@suse.de;
> mi...@kernel.org; pet...@infradead.org; dietma
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Wednesday, February 10, 2021 5:16 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-kernel@v
> -Original Message-
> From: Finn Thain [mailto:fth...@telegraphics.com.au]
> Sent: Wednesday, February 10, 2021 1:29 PM
> To: Song Bao Hua (Barry Song)
> Cc: tanxiaofei ; j...@linux.ibm.com;
> martin.peter...@oracle.com; linux-s...@vger.kernel.org;
> linux-k
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