On Thu, Jul 14, 2022 at 3:29 PM Xin Hao wrote:
>
> Hi barry.
>
> I do some test on Kunpeng arm64 machine use Unixbench.
>
> The test result as below.
>
> One core, we can see the performance improvement above +30%.
I am really pleased to see the 30%+ improvement on unixbench on single core.
>
Hi barry.
I do some test on Kunpeng arm64 machine use Unixbench.
The test result as below.
One core, we can see the performance improvement above +30%.
./Run -c 1 -i 1 shell1
w/o
System Benchmarks Partial Index BASELINE RESULT INDEX
Shell Scripts (1 concurrent)
use raw_smp_processor_id() in arch_touch_nmi_watchdog
because when called from watchdog, the cpu is preemptible.
Signed-off-by: Zhouyi Zhou
---
Dear PPC developers
I found this bug when trying to do rcutorture tests in ppc VM of
Open Source Lab of Oregon State University.
qemu-system-ppc64
On 7/13/22 13:23, Scott Cheloha wrote:
PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits
guest control of one or more virtual watchdog timers. The timers have
millisecond granularity. The guest is terminated when a timer
expires.
This patch adds a watchdog driver for
PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits
guest control of one or more virtual watchdog timers. The timers have
millisecond granularity. The guest is terminated when a timer
expires.
This patch adds a watchdog driver for these timers, "pseries-wdt".
PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits
guest control of one or more virtual watchdog timers.
These timers do not conform to PowerPC device conventions. They are
not affixed to any extant bus, nor do they have full representation in
the device tree.
As a
PAPR v2.12 specifies a new optional function set, "hcall-watchdog",
for the /rtas/ibm,hypertas-functions property. The presence of this
function set indicates support for the H_WATCHDOG hypercall.
Check for this function set and, if present, set the new
FW_FEATURE_WATCHDOG flag.
Signed-off-by:
PAPR v2.12 defines a new hypercall, H_WATCHDOG. The hypercall permits
guest control of one or more virtual watchdog timers.
Add the opcode for the H_WATCHDOG hypercall to hvcall.h. While here,
add a definition for H_NOOP, a possible return code for H_WATCHDOG.
Signed-off-by: Scott Cheloha
---
PAPR v2.12 defines a new hypercall, H_WATCHDOG. This patch series
adds support for this hypercall to powerpc/pseries kernels and
introduces a new watchdog driver, "pseries-wdt", for the virtual
timers exposed by the hypercall.
This series is preceded by the following:
RFC v1:
Hi Laurent,
On 7/13/22 08:47, Laurent Dufour wrote:
> diff --git a/Documentation/admin-guide/sysctl/kernel.rst
> b/Documentation/admin-guide/sysctl/kernel.rst
> index ddccd1077462..d73faa619c15 100644
> --- a/Documentation/admin-guide/sysctl/kernel.rst
> +++
On Wed, Jul 13, 2022 at 11:37:34PM +0800, Ning Qiang wrote:
> In do_adb_query function of drivers/macintosh/adb.c, req->data is copy
> form userland. the parameter "req->data[2]" is Missing check, the
> array size of adb_handler[] is 16, so "adb_handler[
> req->data[2]].original_address" and
On Wed, Jul 13, 2022 at 11:37:34PM +0800, Ning Qiang wrote:
> In do_adb_query function of drivers/macintosh/adb.c, req->data is copy
> form userland. the parameter "req->data[2]" is Missing check, the
> array size of adb_handler[] is 16, so "adb_handler[
> req->data[2]].original_address" and
When a partition is transferred, once it arrives at the destination node,
the partition is active but much of its memory must be transferred from the
start node.
It depends on the activity in the partition, but the more CPU the partition
has, the more memory to be transferred is likely to be.
During an LPM, while the memory transfer is in progress on the arrival
side, some latencies are generated when accessing not yet transferred pages
on the arrival side. Thus, the NMI watchdog may be triggered too
frequently, which increases the risk to hit an NMI interrupt in a bad place
in the
In pseries_migration_partition(), loop until the memory transfer is
complete. This way the calling drmgr process will not exit earlier,
allowing callbacks to be run only once the migration is fully completed.
If reading the VASI state is done after the hypervisor has completed the
migration, the
Introduce a factor which would apply to the NMI watchdog timeout.
This factor is a percentage added to the watchdog_tresh value. The value is
set under the watchdog_mutex protection and lockup_detector_reconfigure()
is called to recompute wd_panic_timeout_tb.
Once the factor is set, it remains
In some circumstances it may be interesting to reconfigure the watchdog
from inside the kernel.
On PowerPC, this may helpful before and after a LPAR migration (LPM) is
initiated, because it implies some latencies, watchdog, and especially NMI
watchdog is expected to be triggered during this
On Fri, Jul 08, 2022 at 02:40:32AM +0200, Jason A. Donenfeld wrote:
> When RDRAND was introduced, there was much discussion on whether it
> should be trusted and how the kernel should handle that. Initially, two
> mechanisms cropped up, CONFIG_ARCH_RANDOM, a compile time switch, and
> "nordrand",
In do_adb_query function of drivers/macintosh/adb.c, req->data is copy
form userland. the parameter "req->data[2]" is Missing check, the
array size of adb_handler[] is 16, so "adb_handler[
req->data[2]].original_address" and "adb_handler[
req->data[2]].handler_id" will lead to oob read.
Hi,
On 7/13/22 03:56, Laurent Dufour wrote:
> Le 12/07/2022 à 18:25, Randy Dunlap a écrit :
>> Hi--
>>
>> On 7/12/22 07:32, Laurent Dufour wrote:
>>>
>>> Reviewed-by: Nicholas Piggin
>>> Signed-off-by: Laurent Dufour
>>> ---
>>> Documentation/admin-guide/sysctl/kernel.rst | 12 ++
>>>
Le 12/07/2022 à 11:47, Laurent Dufour a écrit :
> Le 12/07/2022 à 03:46, Nicholas Piggin a écrit :
>> Excerpts from Laurent Dufour's message of June 27, 2022 11:53 pm:
>>> During a LPM, while the memory transfer is in progress on the arrival side,
>>> some latencies is generated when accessing not
From: sohu0106
In do_adb_query function of drivers/macintosh/adb.c,
req->data is copy form userland. The parameter
"req->data[2]" is Missing check, the array size of
adb_handler[] is 16, so "adb_handler[req->data[2]].
original_address" and "adb_handler[req->data[2]].
handler_id" will lead to oob
On Wed, Jul 13, 2022 at 09:40:37PM +0800, NAME wrote:
> From: sohu0106
For obvious reasons, we need a real name here, and in the signed-off-by
line.
> In do_adb_query function of drivers/macintosh/adb.c,
> req->data is copy form userland. The parameter
> "req->data[2]" is Missing check, the
CPLD firmware can reset board by writing value 0x01 at CPLD memory offset
0x0d. Define syscon-reboot node for this reset support.
Fixes: 54c15ec3b738 ("powerpc: dts: Add DTS file for CZ.NIC Turris 1.x routers")
Signed-off-by: Pali Rohár
---
arch/powerpc/boot/dts/turris1x.dts | 10 +-
1
Le 12/07/2022 à 18:25, Randy Dunlap a écrit :
> Hi--
>
> On 7/12/22 07:32, Laurent Dufour wrote:
>> During a LPM, while the memory transfer is in progress on the arrival side,
>> some latencies is generated when accessing not yet transferred pages on the
>
> are
>
>> arrival
On 7/12/22 10:45, Vaibhav Jain wrote:
> Hi Kajol,
>
> Thanks for the patch. Minor review comment below:
>
> Kajol Jain writes:
>
>> Commit 4c08d4bbc089 ("powerpc/papr_scm: Add perf interface support")
>> added performance monitoring support for papr-scm nvdimm devices via
>> perf interface.
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