this
> > is the correct version which is tested on powernv, pseries (shared and
> > dedicated partitions)
> >
> > drivers/cpuidle/cpuidle-powernv.c | 5 -
> > drivers/cpuidle/cpuidle-pseries.c | 8 ++--
> > 2 files changed, 10 insertions(+), 3 deletions(-)
Hi Aboorva,
Thanks for the patch. This fixes the unpredictable idle state
selection issue under differ idle interval patterns.
Reviewed-by: Vaidyanathan Srinivasan
--Vaidy
* Michal Such?nek [2021-04-23 20:42:16]:
> On Fri, Apr 23, 2021 at 11:59:30PM +0530, Vaidyanathan Srinivasan wrote:
> > * Michal Such?nek [2021-04-23 19:45:05]:
> >
> > > On Fri, Apr 23, 2021 at 09:29:39PM +0530, Vaidyanathan Srinivasan wrote:
> > > > * M
* Michal Such?nek [2021-04-23 19:45:05]:
> On Fri, Apr 23, 2021 at 09:29:39PM +0530, Vaidyanathan Srinivasan wrote:
> > * Michal Such?nek [2021-04-23 09:35:51]:
> >
> > > On Thu, Apr 22, 2021 at 08:37:29PM +0530, Gautham R. Shenoy wrote:
> >
* Michal Such?nek [2021-04-23 09:35:51]:
> On Thu, Apr 22, 2021 at 08:37:29PM +0530, Gautham R. Shenoy wrote:
> > From: "Gautham R. Shenoy"
> >
> > Commit d947fb4c965c ("cpuidle: pseries: Fixup exit latency for
> > CEDE(0)") sets the exit latency of CEDE(0) based on the latency values
> > of th
dcoded value of exit
> latency, which is 10us. Though this is higher than the measured
> values, we would be erring on the side of caution.
>
> Reported-by: Enrico Joedecke
> Fixes: commit d947fb4c965c ("cpuidle: pseries: Fixup exit latency for
> CEDE(0)")
> Sig
s a warning in case we discover an extended-cede state with
> wakeup latency to be 0. In such a case, ensure that CEDE(0) has a
> non-zero wakeup latency.
>
> Fixes: commit d947fb4c965c ("cpuidle: pseries: Fixup exit latency for
> CEDE(0)")
>
> Signed-off-by: Gautham
states are enabled and tested on the P10 platform
> with this fix.
>
> This reverts commit 8747bf36f312356f8a295a0c39ff092d65ce75ae.
>
> Fixes: 8747bf36f312 ("powerpc/powernv/idle: Replace CPU feature check with
> PVR check")
> Signed-off-by: Pratik Rajesh Samp
10 deep sleep code
> (e.g., the BHRB restore) has been taken out, but it can be re-added
> when stop > 3 support is added.
>
> Cc: Ryan P Grimm
> Cc: Michael Neuling
> Cc: Gautham R. Shenoy
> Cc: Pratik Rajesh Sampat
> Signed-off-by: Nicholas Piggin
Tested-by: Vaidyanat
evision: 17.0 (pvr 0080 1100)
>
> Signed-off-by: Michael Neuling
Reviewed-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/kernel/setup-common.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/kernel/setup-common.c
> b/arch/pow
nded CEDE(1) map to
> the same hardware idle state. Since we already get SMT folding from
> the normal CEDE, the Extended CEDE(1) doesn't provide any additional
> value. This patch blocks Extended CEDE(1).
>
> Signed-off-by: Gautham R. Shenoy
Reviewed-by: Vaidyanathan
.0th: 13648
> 99.5th: 14768
> 99.9th: 15664
> min=0, max=29812
>
> With Patch:
> Latency percentiles (usec)
> 50.0th: 30
> 75.0th: 40
> 90.0th: 51
> 95.0th: 59
> *99.0th: 13616
> 99.5th: 14512
> 99.9th: 15696
&
: 13104
> 99.5th: 14672
> 99.9th: 15824
> min=0, max=17993
>
> With-patch:
> Latency percentiles (usec)
> 50.0th: 29
> 75.0th: 40
> 90.0th: 50
> 95.0th: 61
> *99.0th: 13648
> 99.5th: 14768
> 99.9th: 1
= 10
> [5.913183] xcede : Record 0 : hint = 1, latency =0x400 tb-ticks,
> Wake-on-irq = 1
> [5.913188] xcede : Record 1 : hint = 2, latency =0x3e8000 tb-ticks,
> Wake-on-irq = 0
> [5.913193] cpuidle : Skipping the 2 Extended CEDE idle states
>
> Signed-off-by: Gaut
cede states through the
> cpuidle framework, where each of them will have a different
> cede-latency hint.
>
> Signed-off-by: Gautham R. Shenoy
Reviewed-by: Vaidyanathan Srinivasan
> ---
> drivers/cpuidle/cpuidle-pseries.c | 10 +-
> 1 file changed, 9 insertion
* Gautham R Shenoy [2020-07-07 16:41:34]:
> From: "Gautham R. Shenoy"
>
> Hi,
>
> On pseries Dedicated Linux LPARs, apart from the polling snooze idle
> state, we currently have the CEDE idle state which cedes the CPU to
> the hypervisor with latency-hint = 0.
>
> However, the PowerVM hypervi
ing and usage.
>
> Signed-off-by: Pratik Rajesh Sampat
Reviewed-by: Vaidyanathan Srinivasan
> ---
> doc/opal-api/opal-slw-self-save-reg-181.rst | 51 ++
> doc/opal-api/opal-slw-set-reg-100.rst | 5 +
> doc/power-management.rs
SAD G. BRAHMASAMUDRA
> Reviewed-by: Gregory S Still
> Reviewed-by: Jennifer A Stofer
> Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/77614
> Tested-by: Jenkins OP Build CI
> Tested-by: Jenkins OP HW
> Reviewed-by: Daniel M Crowell
> Signed-off-by: Pratik Rajesh
hristian R. Geddes
> Signed-off-by: Prem Shanker Jha
> Signed-off-by: Akshay Adiga
> Signed-off-by: Pratik Rajesh Sampat
Reviewed-by: Vaidyanathan Srinivasan
> 2. The commit also incorporates changes that make STOP API project
> agnostic changes include defining wrapper functions whi
* Pratik Rajesh Sampat [2020-03-17 19:40:18]:
> Parse the device tree for nodes self-save, self-restore and populate
> support for the preferred SPRs based what was advertised by the device
> tree.
>
> Signed-off-by: Pratik Rajesh Sampat
> Reviewed-by: Ram Pai
Reviewe
le respecting it's preferences.
>
> This implementation allows mixing of support for the SPRs, which
> means that a SPR can be self restored while another SPR be self saved if
> they support and prefer it to be so.
>
> Signed-off-by: Pratik Rajesh Sampat
> Reviewed-by: Ra
using the above interface and retains the
> legacy functionality of self restore.
>
> Signed-off-by: Pratik Rajesh Sampat
> Reviewed-by: Ram Pai
Reviewed-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/platforms/powernv/idle.c | 316 +-
> 1 file cha
werpc/mm/numa.c
> index 50d68d21ddcc..ffb971f3a63c 100644
> --- a/arch/powerpc/mm/numa.c
> +++ b/arch/powerpc/mm/numa.c
> @@ -1568,9 +1568,13 @@ int prrn_is_enabled(void)
> return prrn_enabled;
> }
>
> +DEFINE_STATIC_KEY_FALSE(shared_processor);
> +EXPORT_SYMBOL_GPL(shared_processor);
> +
> void __init shared_proc_topology_init(void)
> {
> if (lppaca_shared_proc(get_lppaca())) {
> + static_branch_enable(&shared_processor);
> bitmap_fill(cpumask_bits(&cpu_associativity_changes_mask),
> nr_cpumask_bits);
> numa_update_cpu_topology(false);
Reviewed-by: Vaidyanathan Srinivasan
Thanks Srikar for the fix.
--Vaidy
* Jeremy Kerr [2019-10-04 11:27:46]:
> Hi Vaidy,
>
> > The current topic is who owns setting up the ATT bits for that piece
> > of memory. It is the kernel today. Kernel decides to set this up as
> > normal memory or I/O memory and sets the bits in page table entry.
> >
> > > Or, what if ther
* Jeremy Kerr [2019-10-03 15:07:24]:
> Hi Vasant,
>
> > > OK. How about we just don't do that?
> >
> > Yes. Hostboot will fix that. It will make sure that HBRT is loaded
> > into regular memory.
>
> Super.
>
> > > It sounds like we're just trying to work around an invalid
> > > representation
he PTE mapping.
> CC: Aneesh Kumar K.V
> CC: Jeremy Kerr
> CC: Vaidyanathan Srinivasan
> Signed-off-by: Vasant Hegde
Signed-off-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/platforms/powernv/opal-prd.c | 16 +++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
&
* Claudio Carvalho [2019-08-24 23:19:19]:
>
> On 8/23/19 9:48 AM, Michael Ellerman wrote:
> > Hi Claudio,
>
> Hi Michael,
>
> >
> > Claudio Carvalho writes:
> >> Ultravisor (UV) provides an in-memory console which follows the OPAL
> >> in-memory console structure.
> >>
> >> This patch extends
t; Fixes: commit e83636ac3334 ("pseries/drc-info: Search DRC properties for CPU
> indexes")
> Cc: #v4.16+
> Reported-by: Pavithra R. Prakash
> Signed-off-by: Gautham R. Shenoy
Reviewed-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/platforms/pseries/pseries_energy.
if (gpstate_idx != gpstates->last_lpstate_idx)
> queue_gpstate_timer(gpstates);
>
> + set_pstate(&freq_data);
> spin_unlock(&gpstates->gpstate_lock);
> -
> - /* Timer may get migrated to a different cpu on cpu hot unplug */
> - smp_call_function_any(policy->cpus, set_pstate, &freq_data, 1);
> }
Fix looks good.
Acked-by: Vaidyanathan Srinivasan
* Benjamin Herrenschmidt [2018-03-01 08:40:22]:
> On Thu, 2018-03-01 at 01:03 +0530, Akshay Adiga wrote:
> > commit 1e1601b38e6e ("powerpc/powernv/idle: Restore SPRs for deep idle
> > states via stop API.") uses stop-api provided by the firmware to restore
> > PSSCR. PSSCR restore is required for
t; power9_idle_stop.
>
> This improves performance for ping-pong benchmark with the stop0_lite
> idle state by 2.54% for 2 threads in the same core, and 2.57% for
> different cores.
>
> Signed-off-by: Nicholas Piggin
Reviewed-by: Vaidyanathan Srinivasan
>
ggin
Reviewed-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/include/asm/processor.h | 1 +
> arch/powerpc/kernel/idle_book3s.S | 24 ++--
> arch/powerpc/platforms/powernv/idle.c | 2 +-
> 3 files changed, 20 insertions(+), 7 deletions(-)
>
>
* Nicholas Piggin [2017-11-18 00:08:06]:
> When waking from a CPU idle instruction (e.g., nap or stop), the sync
> for ordering the KVM secondary thread state can be avoided if there
> wakeup is coming from a kernel context rather than KVM context.
>
> This improves performance for ping-pong ben
de and workarounds.
> Cc: Vaidyanathan Srinivasan
> Signed-off-by: Nicholas Piggin
Reviewed-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/kernel/idle_book3s.S | 39
> ---
> 1 file changed, 28 insertions(+), 11 deletions(-)
>
* Michael Ellerman [2017-08-24 20:28:19]:
> Vaidyanathan Srinivasan writes:
>
> > On PowerNV platforms, firmware provides exit latency and
> > target residency for each of the idle states in nano
> > seconds. Cpuidle framework expects the values in micro
> >
ned-off-by: Vaidyanathan Srinivasan
---
drivers/cpuidle/cpuidle-powernv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/cpuidle/cpuidle-powernv.c
b/drivers/cpuidle/cpuidle-powernv.c
index 42896a67aeae..5f3922392059 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++
* Michael Ellerman [2017-07-21 16:33:07]:
> Vaidyanathan Srinivasan writes:
> > * Nicholas Piggin [2017-07-21 11:16:44]:
> >> diff --git a/arch/powerpc/platforms/pseries/pseries_energy.c
> >> b/arch/powerpc/platforms/pseries/pseries_energy.c
> >> ind
r do not print failure message
>
> This driver currently reports the H_BEST_ENERGY is unsupported (even
> when booting in a non-LPAR environment). This is not something the
> administrator can do much with, and not significant for debugging.
>
> Remove it.
>
> Si
* Nicholas Piggin [2017-07-20 11:53:22]:
> POWER9 DD2 PMU can stop after a state-loss idle in some conditions.
>
> A solution is to set then clear MMCRA[60] after wake from state-loss
> idle.
>
> Signed-off-by: Nicholas Piggin
Reviewed-by: Vaidyanathan Srinivasan
>
* Gautham R Shenoy [2017-06-12 21:00:27]:
> On Mon, Jun 12, 2017 at 09:58:32AM +1000, Nicholas Piggin wrote:
> > Ensure these don't get put into bouncing cachelines.
> >
> > Signed-off-by: Nicholas Piggin
>
> Reviewed-by: Gautham R. Shenoy
Revi
* Nicholas Piggin [2017-06-12 09:58:33]:
> A memory barrier is not required after the task wakes up,
> only if we clear the polling flag before waking. The case
> where we have work to do is the important one, so optimise
> for it.
>
> Signed-off-by: Nicholas Piggin
Reviewe
* Nicholas Piggin [2017-06-12 09:58:34]:
> The CTRL register is read-only except bit 63 which is the run latch
> control. This means it can be updated with a mtspr rather than
> mfspr/mtspr.
>
> Signed-off-by: Nicholas Piggin
Reviewed-by: Vaidyanathan Srinivasan
> ---
>
* Nicholas Piggin [2017-06-12 09:58:35]:
> 2*mfmsr and 2*mtmsr can be avoided in the idle sleep/wake code
> because we know the MSR[EE] is clear.
Good optimization for powernv.
> Signed-off-by: Nicholas Piggin
Acked-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/pl
* ?? <1363017...@qq.com> [2017-06-06 19:59:24]:
> I use ipmitool measuring power server power consumption, getting the
> following results without total power consumption as the following picture,
> do I add all power values as total power consumption? I am eager to receive
> someone's
* Nicholas Piggin [2017-04-04 09:52:07]:
> On Tue, 4 Apr 2017 07:54:12 +1000
> Anton Blanchard wrote:
>
> > From: Anton Blanchard
> >
> > The core of snooze_loop() continually bounces between low and very
> > low thread priority. Changing thread priorities is an expensive
> > operation that
the
> other non idle threads on the core.
>
> Signed-off-by: Anton Blanchard
Reviewed-by: Vaidyanathan Srinivasan
> ---
> drivers/cpuidle/cpuidle-powernv.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/cpuidle/cpuidle-powernv.c
-off-by: Anton Blanchard
Reviewed-by: Vaidyanathan Srinivasan
> ---
> drivers/cpuidle/cpuidle-powernv.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/cpuidle/cpuidle-powernv.c
> b/drivers/cpuidle/cpuidle-powernv.c
> index 9d9f164894eb..8c991c
All CPUs that can run PowerNV support very low priority, so we can
> avoid the change completely.
>
> Signed-off-by: Anton Blanchard
Reviewed-by: Vaidyanathan Srinivasan
> ---
> drivers/cpuidle/cpuidle-powernv.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/d
* Rafael J. Wysocki [2017-03-23 16:28:31]:
> On Thu, Mar 23, 2017 at 4:22 PM, Vaidyanathan Srinivasan
> wrote:
> > drv->cpumask defaults to cpu_possible_mask in __cpuidle_driver_init().
> > On PowerNV platform cpu_present could be less than cpu_possible in cases
> >
* Rafael J. Wysocki [2017-03-23 16:27:31]:
> On Thu, Mar 23, 2017 at 4:22 PM, Vaidyanathan Srinivasan
> wrote:
> > If a given cpu is not in cpu_present and cpu hotplug
> > is disabled, arch can skip setting up the cpu_dev.
> >
> > Arch cpuidle driver should
] Registration of powernv driver failed.
Signed-off-by: Vaidyanathan Srinivasan
---
drivers/cpuidle/sysfs.c | 12
1 file changed, 12 insertions(+)
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index c5adc8c..f2c3bce 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle
e30] c000b564 ret_from_kernel_thread+0x5c/0x78
This patch fixes the bug by passing correct cpumask from
powernv-cpuidle driver.
Signed-off-by: Vaidyanathan Srinivasan
---
drivers/cpuidle/cpuidle-powernv.c | 18 ++
1 file changed, 18 insertions(+)
diff --git a/drivers/cpuidle/cpui
ess incorrect address and crash. The
following patch series fixes the cpuidle-powernv driver and also adds
additional checks in cpuidle_add_sysfs()
This patch set is against v4.11-rc3.
Changed from v1: Updated commit message and comments.
Signed-off-by: Vaidyanathan Srinivasan
* Michael Ellerman [2017-03-22 21:55:50]:
> Vaidyanathan Srinivasan writes:
> > * Michael Ellerman [2017-03-20 14:05:39]:
> >> Vaidyanathan Srinivasan writes:
> >
> >> > On powernv platform cpu_present could be less than cpu_possible
> >> > in
* Michael Ellerman [2017-03-20 14:05:39]:
> Vaidyanathan Srinivasan writes:
>
> > * Michael Neuling [2017-03-18 16:28:02]:
> >
> >> Vaidy,
> >>
> >> Thanks for fixing this.
> >>
> >> > drv->cpumask defaults to cpu_po
.
Signed-off-by: Vaidyanathan Srinivasan
---
drivers/cpuidle/sysfs.c | 12
1 file changed, 12 insertions(+)
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index c5adc8c..19dcf32 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -615,6 +615,18 @@ int
* Michael Neuling [2017-03-18 16:28:02]:
> Vaidy,
>
> Thanks for fixing this.
>
> > drv->cpumask defaults to cpu_possible_mask in __cpuidle_driver_init().
> > This breaks cpuidle on powernv where sysfs files are not created for
> > cpus in cpu_possible_mask that cannot be hot-added.
>
> I thin
12c
[c00ff1503e30] c000b564 ret_from_kernel_thread+0x5c/0x78
This patch fixes the issue by passing correct cpumask from
powernv-cpuidle driver.
Signed-off-by: Vaidyanathan Srinivasan
---
drivers/cpuidle/cpuidle-powernv.c | 22 ++
1 file changed, 22 inserti
From: Gautham R. Shenoy
ESL=1 losses some HYP SPR context and not idea for cpuidle,
however can be used for offline cpus.
Signed-off-by: Vaidyanathan Srinivasan
Signed-off-by: Gautham R. Shenoy
---
arch/powerpc/include/asm/cpuidle.h| 15 +++
arch/powerpc/platforms/powernv
This is a debug patch that helps trace various STOP
state transitions and look at srr1 and psscr at wakeup.
Signed-off-by: Vaidyanathan Srinivasan
---
arch/powerpc/platforms/powernv/smp.c | 4
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/platforms/powernv/smp.c
b/arch
The attached patch enables ESL=1 STOP2 for cpuhotplug. This is a debug
patch that we could carry now until STOP states are discovered from
device tree.
Test run:
[ 151.670021] CPU8 going offline with request psscr 003f0332
[ 151.719856] CPU 8 offline: Remove Rx thread
[ 189.200410] CP
: Vaidyanathan Srinivasan
---
arch/powerpc/sysdev/xics/xics-common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/sysdev/xics/xics-common.c
b/arch/powerpc/sysdev/xics/xics-common.c
index 69d858e..c674a9d 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b
* Segher Boessenkool [2016-10-12 08:26:48]:
> On Wed, Oct 12, 2016 at 02:05:19PM +1100, Michael Ellerman wrote:
> > Segher Boessenkool writes:
> >
[snip]
>
> > > --- a/arch/powerpc/include/asm/cpuidle.h
> > > +++ b/arch/powerpc/include/asm/cpuidle.h
> > > @@ -26,7 +26,7 @@ extern u64 pnv_fir
* Benjamin Herrenschmidt [2016-08-06 08:38:53]:
> On Fri, 2016-08-05 at 19:13 +0530, Mahesh J Salgaonkar wrote:
> > From: Mahesh Salgaonkar
> >
> > The function pnv_restore_hyp_resource() loads the TOC into r2 from
> > the invalid PACA pointer before fixing r13 value. This do not affect
> > POW
s to be clear before accessing it as PACA to avoid loading invalid
> values from invalid PACA pointer.
>
> Fix this by loading TOC after r13 register is corrected.
>
> Signed-off-by: Mahesh Salgaonkar
Acked-by: Vaidyanathan Srinivasan
> ---
> arch/powerpc/kernel/idle_book3s.
the driver
This fix resolves the page accounting warning shown below:
BUG: Bad rss-counter state mm:c007d34ac600 idx:1 val:19
The above warning is triggered since _PAGE_SPECIAL was incorrectly
being set for the normal kernel COW pages.
Signed-off-by: Vaidyanathan Srinivasan
---
arch/powe
* Vaidyanathan Srinivasan [2015-06-25 11:45:46]:
[snip]
> Hi Ben,
>
> remap_pfn_range() is the correct method to map the firmware pages
> because we will not have struct page associated with this RAM area.
>
> We do a memblock_reserve() in early boot and take out this me
* Vaidyanathan Srinivasan [2015-06-21 23:56:16]:
> opal-prd driver will mmap() firmware code/data area as private
> mapping to prd user space daemon. Write to this page will
> trigger COW faults. The new COW pages are normal kernel RAM
> pages accounted by the kernel and are
the driver
This fix resolves the page accounting warning shown below:
BUG: Bad rss-counter state mm:c007d34ac600 idx:1 val:19
The above warning is triggered since _PAGE_SPECIAL was incorrectly
being set for the normal kernel COW pages.
Signed-off-by: Vaidyanathan Srinivasan
---
arch/powe
* Benjamin Herrenschmidt [2015-05-30 20:38:22]:
> On Sat, 2015-05-30 at 11:31 +0530, Vaidyanathan Srinivasan wrote:
> > In shared lpar case, spinning in guest context may potentially take
> > away cycles from other lpars waiting to run on the same physical cpu.
> >
> &
* Preeti U Murthy [2015-05-29 19:17:17]:
[snip]
> > + if (max_idle_state > 1) {
> > + snooze_timeout_en = true;
> > + snooze_timeout = cpuidle_state_table[1].target_residency *
> > +tb_ticks_per_usec;
> > + }
>
> Any idea why we don't have sno
.
Signed-off-by: Vaidyanathan Srinivasan
---
Tested on powernv and pseries platforms with v3.16-rc7 kernel.
drivers/cpufreq/powernv-cpufreq.c | 18 --
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/powernv-cpufreq.c
b/drivers/cpufreq/powernv
Flags from device-tree need to be parsed with accessors for
interpreting correct value in little-endian.
Signed-off-by: Vaidyanathan Srinivasan
---
drivers/cpuidle/cpuidle-powernv.c | 16
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/cpuidle/cpuidle
* Michael Ellerman [2014-07-28 17:03:10]:
> On Fri, 2014-07-25 at 11:07 +1000, Gavin Shan wrote:
> > I'm tracing one LSI interrupt issue on P8 box, and eventually into the
> > following kernel crash. Not sure if there is one fix against this? :-)
>
> Vaidy wrote that I'm pretty sure (on CC).
Ye
* Gautham R Shenoy [2014-03-27 15:00:50]:
[snip]
> > > + u32 len_ids, len_freqs;
> > > +
> > > + power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");
> > > + if (!power_mgt) {
> > > + pr_warn("power-mgt node not found\n");
> > > + return -ENODEV
* Gautham R Shenoy [2014-03-21 16:13:17]:
> Hi Viresh,
>
> On Fri, Mar 21, 2014 at 02:11:32PM +0530, Viresh Kumar wrote:
> > On Thu, Mar 20, 2014 at 5:40 PM, Gautham R. Shenoy
> > wrote:
> > > From: Vaidyanathan Srinivasan
> >
> > Hi Vaidy,
> &
IBM POWER non-virtualized platforms.
PState table is obtained from OPAL v3 firmware through device
tree.
powernv_cpufreq back-end driver would parse the relevant device-tree
nodes and initialise the cpufreq subsystem on powernv platform.
Signed-off-by: Vaidyanathan Srinivasan
Signed-off-by:
k and use the ones that belongs to the first
thread sibling of the core.
cpu_first_thread_sibling() macro is used to find the *common* lock for
all thread siblings belonging to a core.
Signed-off-by: Srivatsa S. Bhat
Signed-off-by: Vaidyanathan Srinivasan
---
drivers/cpufreq/powernv-cpufreq.c |
):
powernv, cpufreq: Add per-core locking to serialize frequency transitions
Vaidyanathan Srinivasan (1):
powernv: cpufreq driver for powernv platform
arch/powerpc/include/asm/reg.h|4 +
drivers/cpufreq/Kconfig.powerpc |9 +
drivers/cpufreq/Makefile |1
drivers
ame group.
Signed-off-by: Preeti U Murthy
Signed-off-by: Vaidyanathan Srinivasan
---
kernel/sched/fair.c | 18 ++
1 file changed, 18 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 828ed97..bbcd96b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fai
his domain
has no idle cpu.
Hence, nr_busy check against group weight can be removed.
Reported-by: Michael Neuling
Signed-off-by: Vaidyanathan Srinivasan
Signed-off-by: Preeti U Murthy
---
kernel/sched/fair.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/sc
CE comes before the check for ASYM_PACKING.
Priority is given to avoid more than one busy thread in a core as much
as possible before attempting asymmetric packing.
Signed-off-by: Preeti U Murthy
Signed-off-by: Vaidyanathan Srinivasan
---
kernel/sched/fair.c | 19 +--
1 f
.
This series applies on v3.12-rc6 and tested on x86 and powerpc.
--Vaidy
---
Preeti U Murthy (2):
sched: Fix nohz_kick_needed to consider the nr_busy of the parent
domain's group
sched: Aggressive balance in domains whose groups share package resources
Vaidyanathan Srinivas
ll the bells and whisles of cpuidle.
Reported-by: Paul Mackerras
Signed-off-by: Vaidyanathan Srinivasan
Acked-by: Deepthi Dharwar
Signed-off-by: Benjamin Herrenschmidt
diff --git a/arch/powerpc/platforms/pseries/setup.c
b/arch/powerpc/platforms/pseries/setup.c
index c11c823..54b998f
cpuidle in initialized.
Reported-by: Paul Mackerras
Signed-off-by: Vaidyanathan Srinivasan
Acked-by: Deepthi Dharwar
diff --git a/arch/powerpc/platforms/pseries/setup.c
b/arch/powerpc/platforms/pseries/setup.c
index c11c823..fd4f995 100644
--- a/arch/powerpc/platforms/pseries
* Preeti U Murthy [2013-07-27 13:20:37]:
> Hi Ben,
>
> On 07/27/2013 12:00 PM, Benjamin Herrenschmidt wrote:
> > On Fri, 2013-07-26 at 08:09 +0530, Preeti U Murthy wrote:
> >> *The lapic of a broadcast CPU is active always*. Say CPUX, wants the
> >> broadcast CPU to wake it up at timeX. Since w
* Benjamin Herrenschmidt [2013-07-27 16:30:05]:
> On Fri, 2013-07-26 at 08:09 +0530, Preeti U Murthy wrote:
> > *The lapic of a broadcast CPU is active always*. Say CPUX, wants the
> > broadcast CPU to wake it up at timeX. Since we cannot program the lapic
> > of a remote CPU, CPUX will need to
* Vaidyanathan Srinivasan [2013-03-22 21:19:35]:
[snip]
> Prior to the above commit:
> #define node_distance(from,to)
> ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
>
> Restoring compatible behavior with this patch for old powerpc systems
>
encoded as form0.
Signed-off-by: Vaidyanathan Srinivasan
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index bba87ca..6a252c4 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -201,7 +201,7 @@ int __node_distance(int a, int b)
int distance = LOCA
8 7ca62850 7cc300d0 78c7e102
> 7cf01120
> [ 18.824923] 78c60660 39200010 39400020 39600030 <7e00200c> 7c0020ce
> 38840010 409f001c
> [ 18.824935] ---[ end trace 0bb95124affaaa45 ]---
> [ 18.825046] Unrecoverable VMX/Altivec Unavailable Exception f20 at
> c0052d08
>
Signed-off-by: Vaidyanathan Srinivasan
---
arch/powerpc/include/asm/hvcall.h |3
arch/powerpc/platforms/pseries/Kconfig | 10 +
arch/powerpc/platforms/pseries/Makefile |1
arch/powerpc/platforms/pseries/pseries_energy.c | 326 +++
4
pu_core_index_of_thread(5) = 1
cpu_first_thread_of_core(1) = 4
cpu_core_index_of_thread() is used in cpu_to_drc_index() in the
module and cpu_first_thread_of_core() is used in
drc_index_to_cpu() in the module.
Make API changes to few callers. Export symbols for use in modules.
Signed-off-by: Vaidyanathan
patch series is conservative and
has more error checking in device tree parsing and drc index matching
code than what may be required.
Thanks,
Vaidy
---
Vaidyanathan Srinivasan (2):
powerpc: cleanup APIs for cpu/thread/core mappings
powerpc: add support for new hcall H_BEST_ENERGY
* Darren Hart [2010-08-05 19:19:00]:
> On 07/22/2010 10:09 PM, Benjamin Herrenschmidt wrote:
> > On Thu, 2010-07-22 at 21:44 -0700, Darren Hart wrote:
> >
> >> suggestion I updated the instrumentation to display the
> >> local_save_flags and irqs_disabled_flags:
> >
> >> Jul 22 23:36:58 igoor
* Nathan Fontenot [2010-07-26 14:13:35]:
> On 07/22/2010 11:13 PM, Vaidyanathan Srinivasan wrote:
> > * Robert Jennings [2010-07-22 21:43:44]:
> >
> >> If a CPU remove is attempted using the 'release' interface on hardware
> >> which supports extende
* Darren Hart [2010-08-04 21:45:51]:
> On 07/23/2010 12:07 AM, Vaidyanathan Srinivasan wrote:
> >* Benjamin Herrenschmidt [2010-07-23 15:11:00]:
> >
> >>On Fri, 2010-07-23 at 10:38 +0530, Vaidyanathan Srinivasan wrote:
> >>>Yes. extended_cede_processor() wi
* Benjamin Herrenschmidt [2010-08-03 14:44:13]:
> On Thu, 2010-07-22 at 06:27 +0530, Vaidyanathan Srinivasan wrote:
> > These APIs take logical cpu number as input
> > Change cpu_first_thread_in_core() to cpu_leftmost_thread_sibling()
> > Change cpu_las
* Benjamin Herrenschmidt [2010-07-23 15:11:00]:
> On Fri, 2010-07-23 at 10:38 +0530, Vaidyanathan Srinivasan wrote:
> > Yes. extended_cede_processor() will return with interrupts enabled in
> > the cpu. (This is done by the hypervisor). Under normal cases we
> > cannot b
* Darren Hart [2010-07-22 21:44:04]:
> On 07/22/2010 04:57 PM, Darren Hart wrote:
> > On 07/22/2010 03:25 PM, Benjamin Herrenschmidt wrote:
> >> On Thu, 2010-07-22 at 11:24 -0700, Darren Hart wrote:
> >>>
> >>> 1) How can the preempt_count() get mangled across the H_CEDE hcall?
> >>> 2) Should we
* Robert Jennings [2010-07-22 21:43:44]:
> If a CPU remove is attempted using the 'release' interface on hardware
> which supports extended cede, the CPU will be put in the INACTIVE state
> rather than the OFFLINE state due to the default preferred_offline_state
> in that situation. In the INACT
* Michael Neuling [2010-06-28 16:11:06]:
[snip]
> > These hints are abstract number given by the hypervisor based on
> > the extended knowledge the hypervisor has regarding the current system
> > topology and resource mappings.
> >
> > The activate and the deactivate part is for the two distinc
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