On 2025-04-25 19:54:56 [+0530], Shrikanth Hegde wrote:
> > > But looking at the semantics of usage of xfer_to_guest_mode_work
> > > I think using schedule is probably right over here.
> > > Correct me if i got it all wrong.
> >
> > No, if you do xfer_to_guest_mode_work() then it will invoke schedu
On 2025-04-25 16:49:19 [+0530], Shrikanth Hegde wrote:
> On 4/25/25 00:08, Sebastian Andrzej Siewior wrote:
> > On 2025-04-24 21:27:59 [+0530], Shrikanth Hegde wrote:
> > > > > diff --git a/arch/powerpc/kvm/book3s_hv.c
> > > > > b/arch/powerpc/kvm/book3s_hv
On 2025-04-24 21:27:59 [+0530], Shrikanth Hegde wrote:
> > > diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
> > > index 19f4d298d..123539642 100644
> > > --- a/arch/powerpc/kvm/book3s_hv.c
> > > +++ b/arch/powerpc/kvm/book3s_hv.c
> > > @@ -4901,7 +4901,7 @@ int kvmhv_run_s
On 2025-04-21 15:58:36 [+0530], Shrikanth Hegde wrote:
> diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
> index 19f4d298d..123539642 100644
> --- a/arch/powerpc/kvm/book3s_hv.c
> +++ b/arch/powerpc/kvm/book3s_hv.c
> @@ -80,8 +80,8 @@
> #include
> #include
> #include
dev@lists.ozlabs.org
Reviewed-by: Christophe Leroy
Reviewed-by: Shrikanth Hegde
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/traps.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index edf5cabe5d
dev@lists.ozlabs.org
Reviewed-by: Christophe Leroy
Reviewed-by: Shrikanth Hegde
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/traps.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index edf5cabe5d
an Srinivasan
Cc: Michael Ellerman
Cc: Nicholas Piggin
Cc: Christophe Leroy
Cc: Naveen N Rao
Cc: linuxppc-dev@lists.ozlabs.org
Reviewed-by: Christophe Leroy
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/traps.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --g
On 2025-02-08 13:05:57 [+0530], Shrikanth Hegde wrote:
>
>
> On 2/4/25 13:52, Sebastian Andrzej Siewior wrote:
> > Use preempt_model_str() instead of manually conducting the preemption
> > model. Use pr_emerg() instead of printk() to pass a loglevel.
>
> even on p
: Sebastian Andrzej Siewior
---
v2…v3:
- Use printk() instead of pr_emerg() to remain consistent with the
other invocations in terms of printing context.
arch/powerpc/kernel/traps.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc
On 2025-02-03 16:19:06 [+0100], Christophe Leroy wrote:
>
>
> Le 03/02/2025 à 15:16, Sebastian Andrzej Siewior a écrit :
> > Use preempt_model_str() instead of manually conducting the preemption
> > model. Use pr_emerg() instead of printk() to pass a loglevel.
>
>
: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/traps.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index edf5cabe5dfdb..9eb383189cfb2 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
On 2025-01-30 22:27:07 [+0530], Shrikanth Hegde wrote:
> > | #DEFINE need_irq_preemption() \
> > | (static_branch_unlikely(&sk_dynamic_irqentry_exit_cond_resched))
> > |
> > | if (need_irq_preemption()) {
> >
> > be a bit smaller/ quicker? This could be a fast path ;)
>
> I am okay wit
On 2025-01-30 16:03:09 [+0100], Christophe Leroy wrote:
> Le 30/01/2025 à 15:54, Sebastian Andrzej Siewior a écrit :
> > On 2025-01-06 10:49:19 [+0530], Shrikanth Hegde wrote:
> > > --- a/arch/powerpc/kernel/interrupt.c
> > > +++ b/arch/powerpc/kernel/interr
On 2025-01-06 10:49:19 [+0530], Shrikanth Hegde wrote:
> --- a/arch/powerpc/kernel/interrupt.c
> +++ b/arch/powerpc/kernel/interrupt.c
> @@ -25,6 +25,10 @@
> unsigned long global_dbcr0[NR_CPUS];
> #endif
>
> +#if defined(CONFIG_PREEMPT_DYNAMIC) &&
> defined(CONFIG_HAVE_PREEMPT_DYNAMIC_KEY)
> +
On 2025-01-08 10:55:04 [+0100], Helge Deller wrote:
> Nice catch.
>
> Acked-by: Helge Deller
>
> This patch really should be backported.
> Can you add a Cc: stable tag?
It should be picked due to the fixes tag. I add it if I am going to
repost it.
> Helge
Sebastian
lerman
Cc: Naveen N Rao
Cc: Nicholas Piggin
Cc: Sergey Senozhatsky
Cc: linux-par...@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Reviewed-by: Sergey Senozhatsky
Acked-by: Peter Zijlstra (Intel)
Signed-off-by: Sebastian Andrzej Siewior
---
include/linux/kallsyms.h | 2 +-
1 file
Ellerman
Cc: Naveen N Rao
Cc: Nicholas Piggin
Cc: Steven Rostedt
Cc: linux-trace-ker...@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Acked-by: Peter Zijlstra (Intel)
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/trace/ftrace.c | 6 ++
arch/powerpc/kernel/trace
Ellerman
Cc: Naveen N Rao
Cc: Nicholas Piggin
Cc: Steven Rostedt
Cc: linux-trace-ker...@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/trace/ftrace.c | 6 ++
arch/powerpc/kernel/trace/ftrace_64_pg.c | 6 ++
2 files
Cc: Michael Ellerman
Cc: Naveen N Rao
Cc: Nicholas Piggin
Cc: Sergey Senozhatsky
Cc: linux-par...@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Sebastian Andrzej Siewior
---
include/linux/kallsyms.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/includ
On 2024-11-19 13:08:31 [-0800], Ankur Arora wrote:
>
> Shrikanth Hegde writes:
>
> > Large user copy_to/from (more than 16 bytes) uses vmx instructions to
> > speed things up. Once the copy is done, it makes sense to try schedule
> > as soon as possible for preemptible kernels. So do this for
>
nd rt kernel.
>
> Not checking for lazy bit here, since it could lead to unnecessary
> context switches.
>
> Suggested-by: Sebastian Andrzej Siewior
> Signed-off-by: Shrikanth Hegde
> ---
> arch/powerpc/lib/vmx-helper.c | 2 +-
> 1 file changed, 1 insertion(+
dda-c79e-4d95-935b-e4b93eb07...@linux.ibm.com/
The lazy bits are only in tip.
Reviewed-by: Sebastian Andrzej Siewior
> Signed-off-by: Shrikanth Hegde
> ---
> diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
> index af62ec974b97..8f4acc55407b 100644
abled
section")
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/perf/imc-pmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index 9d229ef7f86ef..ada817c49b722 100644
--- a/arch/powerpc/perf/imc-pmu.c
The RTAS work area allocator is using the generic memory allocator and
as such it must select it.
Select the generic memory allocator on pseries.
Fixes: 43033bc62d349 ("powerpc/pseries: add RTAS work area allocator")
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/platfor
On 2022-09-01 16:24:09 [-0400], Kent Overstreet wrote:
> > --- a/include/linux/mmap_lock.h
> > +++ b/include/linux/mmap_lock.h
> > @@ -60,6 +60,18 @@ static inline void __mmap_lock_trace_released(struct
> > mm_struct *mm, bool write)
> >
> > #endif /* CONFIG_TRACING */
> >
> > +static inline
On 2022-06-15 17:41:45 [+0200], Arnd Bergmann wrote:
> Applied to the asm-generic tree with the above fixup, thanks!
Thank you Arnd.
> Arnd
Sebastian
Andrzej Siewior
---
Initially I aimed only for the asm-generic bits and arm since I have
most bits of the port ready. Arnd then suggested to do all arches at
once and here it is.
I tried to keep it minimal in sense that I didn't remove the dedicated
softirq-stacks on parisc or powerpc for ins
On 2022-06-09 15:46:04 [+], David Laight wrote:
> From: Sebastian Andrzej Siewior
> > Sent: 09 June 2022 16:03
> >
> > On 2022-05-30 16:15:11 [-0700], Davidlohr Bueso wrote:
> > > Tasklets have long been deprecated as being too heavy on the system
> > >
On 2022-05-30 16:15:11 [-0700], Davidlohr Bueso wrote:
> Tasklets have long been deprecated as being too heavy on the system
> by running in irq context - and this is not a performance critical
> path. If a higher priority process wants to run, it must wait for
> the tasklet to finish before doing
On 2022-05-30 16:15:10 [-0700], Davidlohr Bueso wrote:
> diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
> index d0eab5700dc5..31b1900489e7 100644
> --- a/drivers/scsi/ibmvscsi/ibmvfc.c
> +++ b/drivers/scsi/ibmvscsi/ibmvfc.c
> @@ -891,7 +891,7 @@ static void ibmvfc_rele
On 2022-05-30 16:15:08 [-0700], Davidlohr Bueso wrote:
> diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
> b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
> index eee1a24f7e15..fafadb7158a3 100644
> --- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
> +++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
>
ernel.org
Cc: linux...@vger.kernel.org
Cc: linux-xte...@linux-xtensa.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Sebastian Andrzej Siewior
---
arch/alpha/include/asm/spinlock_types.h | 2 +-
arch/arm/include/asm/spinlock_types.h| 2 +-
arch/arm64/include/asm/spinlock_t
On 2021-08-03 17:30:40 [+0200], Hans de Goede wrote:
> Hi Sebastien,
Hi Hans,
> On 8/3/21 4:15 PM, Sebastian Andrzej Siewior wrote:
> > This is a tree wide replacement of the deprecated CPU hotplug functions
> > which are only wrappers around the actual functions.
>
This is a tree wide replacement of the deprecated CPU hotplug functions
which are only wrappers around the actual functions.
Each patch is independent and can be picked up by the relevant maintainer.
Cc: Alexander Shishkin
Cc: Amit Kucheria
Cc: Andrew Morton
Cc: Andy Lutomirski
Cc: Arnaldo Ca
: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: linuxppc-dev@lists.ozlabs.org
Cc: kvm-...@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/rtasd.c | 4 ++--
arch/powerpc/kvm/book3s_hv_builtin.c | 10 +-
arch/powerpc/platforms/powernv/idle.c
linear_mapping_mutex to ifdef block where it is
used.
Fixes: 1f73ad3e8d755 ("powerpc/mm: print warning in
arch_remove_linear_mapping()")
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/mm/mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/
On 2021-01-09 01:33:52 [+0100], Thomas Bogendoerfer wrote:
> On Sat, Jan 09, 2021 at 12:58:05AM +0100, Thomas Bogendoerfer wrote:
> > On Fri, Jan 08, 2021 at 08:20:43PM +, Paul Cercueil wrote:
> > > Hi Thomas,
> > >
> > > 5.11 does not boot anymore on Ingenic SoCs, I bisected it to this commit
On 2020-11-12 09:10:34 [+0100], Marek Szyprowski wrote:
> I can do more tests to help fixing this issue. Just let me know what to do.
-> https://lkml.kernel.org/r/87y2j6n8mj@nanos.tec.linutronix.de
Sebastian
conveyed in an argument passed by the caller,
which usually knows the context.
Use the `sched_napi' argument passed by the callback. It is set true if
called from the interrupt handler and NAPI should be scheduled.
Signed-off-by: Sebastian Andrzej Siewior
Cc: "Horia Geantă"
Cc: Ay
conveyed in an argument passed by the caller,
which usually knows the context.
Use the `sched_napi' argument passed by the callback. It is set true if
called from the interrupt handler and NAPI should be scheduled.
Signed-off-by: Sebastian Andrzej Siewior
Cc: "Horia Geantă"
Cc: Ay
he value to the caller including
`qman_cb_dqrr' typedef which is used by the dpaa and the crypto driver.
Signed-off-by: Sebastian Andrzej Siewior
Cc: "Horia Geantă"
Cc: Aymen Sghaier
Cc: Herbert XS
Cc: "David S. Miller"
Cc: Madalin Bucur
Cc: Jakub Kicins
On 2020-10-31 10:12:15 [-0700], Jakub Kicinski wrote:
> Nit: some networking drivers have a bool napi which means "are we
> running in napi context", the semantics here feel a little backwards,
> at least to me. But if I'm the only one thinking this, so be it.
I renamed it to `sched_napi'.
Sebast
he value to the caller including
`qman_cb_dqrr' typedef which is used by the dpaa and the crypto driver.
Signed-off-by: Sebastian Andrzej Siewior
Cc: "Horia Geantă"
Cc: Aymen Sghaier
Cc: Herbert Xu
Cc: "David S. Miller"
Cc: Madalin Bucur
Cc: Jakub Kicins
conveyed in an argument passed by the caller,
which usually knows the context.
Use the `napi' argument passed by the callback. It is set true if
called from the interrupt handler and NAPI should be scheduled.
Signed-off-by: Sebastian Andrzej Siewior
Cc: "Horia Geantă"
Cc: Aymen Sghaier
t_coex_supported_feature()
None of these have a caller. Welcome to the wonderful world of HALs and
onion layers.
Remove in_interrupt() check.
Signed-off-by: Sebastian Andrzej Siewior
Cc: Ping-Ke Shih
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-wirel...@vger.ker
conveyed in an argument passed by the caller,
which usually knows the context.
Use the `napi' argument passed by the callback. It is set true if
called from the interrupt handler and NAPI should be scheduled.
Signed-off-by: Sebastian Andrzej Siewior
Cc: "Horia Geantă"
Cc: Aymen Sghaier
x27;s pointless to
invoke schedule() if there is no request to reschedule.
Pass the may_sleep condition through the various call chains leading to
issuecommand().
Signed-off-by: Sebastian Andrzej Siewior
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-wirel...@vger.ker
code further use list_empty() instead of walking the list
and counting the entries just to check the count for > 0 at the end.
Signed-off-by: Sebastian Andrzej Siewior
Cc: Ping-Ke Shih
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-wirel...@vger.kerne
Sebastian Andrzej Siewior
Cc: Jouni Malinen
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-wirel...@vger.kernel.org
Cc: net...@vger.kernel.org
---
drivers/net/wireless/intersil/hostap/hostap_ioctl.c | 13 +
1 file changed, 1 insertion(+), 12 deletions(-)
Andrzej Siewior
Cc: Daniel Drake
Cc: Ulrich Kunitz
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-wirel...@vger.kernel.org
Cc: net...@vger.kernel.org
---
drivers/net/wireless/zydas/zd1211rw/zd_usb.c | 15 ---
1 file changed, 15 deletions(-)
diff --git
context
through a quite large amount of functions.
As this is ancient hardware, avoid the churn and enforce the invocation of
those functions through the JOB machinery.
Signed-off-by: Sebastian Andrzej Siewior
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: l
Andrzej Siewior
Cc: Saeed Mahameed
Cc: Leon Romanovsky
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-r...@vger.kernel.org
---
drivers/net/ethernet/mellanox/mlx5/core/eq.c | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/mel
y.
Invoke airo_read_wireless_stats() directly from the callback and remove
the now unused JOB_WSTATS handling.
Signed-off-by: Sebastian Andrzej Siewior
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: linux-wirel...@vger.kernel.org
Cc: net...@vger.kernel.org
---
driver
replace the warning and the lock assert with lockdep_assert_held().
Signed-off-by: Sebastian Andrzej Siewior
Cc: Rain River
Cc: Zhu Yanjun
Cc: "David S. Miller"
Cc: Jakub Kicinski
Cc: net...@vger.kernel.org
---
drivers/net/ethernet/nvidia/forcedeth.c | 6 +-
1 file changed, 1
(), tlan_mii_write_reg() and tlan_phy_print() are invoked
from interrupt and other contexts.
Split out the actual function body into helper variants which are called
from interrupt context and make the original functions wrappers which
acquire tlan_priv::lock unconditionally.
Signed-off-by: Sebastian Andrzej Siewior
et_rx_mode()
s2io_set_multicast()
s2io_txpic_intr_handle()
s2io_link()
init_tti()
Add a may_sleep argument to wait_for_cmd_complete(), s2io_set_multicast()
and init_tti() and hand the context information in from the call sites.
Signed-off-by: Sebastian Andrzej Siewior
Cc: Jon
n the invoked functions (always enabled or debug
option dependent) cover these conditions already, so the BUG_ON()'s do not
really provide additional value.
Just remove them.
Signed-off-by: Sebastian Andrzej Siewior
Cc: Kalle Valo
Cc: "David S. Miller"
Cc: Jakub Kicin
Folks,
in the discussion about preempt count consistency across kernel configurations:
https://lore.kernel.org/r/20200914204209.256266...@linutronix.de/
Linus clearly requested that code in drivers and libraries which changes
behaviour based on execution context should either be split up so th
Fenghua Yu
Cc: linux-i...@vger.kernel.org
Reported-by: kbuild test robot
Signed-off-by: Sebastian Andrzej Siewior
---
arch/ia64/include/asm/uaccess.h | 1 -
arch/ia64/kernel/process.c | 1 +
arch/ia64/mm/ioremap.c | 1 +
3 files changed, 2 insertions(+), 1 deletion(-)
diff --git a
eentime Hu
Cc: Vincent Chen
Reported-by: kbuild test robot
Signed-off-by: Sebastian Andrzej Siewior
---
arch/nds32/include/asm/uaccess.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h
index 8916ad9f9f139..3a9219f53ee0d 10
c: linux-c...@vger.kernel.org
Reported-by: kbuild test robot
Signed-off-by: Sebastian Andrzej Siewior
---
arch/csky/include/asm/uaccess.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/csky/include/asm/uaccess.h b/arch/csky/include/asm/uaccess.h
index eaa1c3403a424..abefa125b93cf 100644
--- a
Cc: linux-hexa...@vger.kernel.org
Reported-by: kbuild test robot
Signed-off-by: Sebastian Andrzej Siewior
---
arch/hexagon/include/asm/uaccess.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/hexagon/include/asm/uaccess.h
b/arch/hexagon/include/asm/uaccess.h
index 00cb38faad0c4..c10
The following mini-series removes linux/mm.h from the asm/uaccess.h of
the individual architecture. The series has been compile tested with the
defconfig and additionally for ia64 with the "special" allmodconfig
supplied by the bot. The regular allmod for the architectures does not
compile (even wi
chal Simek
Reported-by: kbuild test robot
Signed-off-by: Sebastian Andrzej Siewior
---
arch/microblaze/include/asm/uaccess.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/microblaze/include/asm/uaccess.h
b/arch/microblaze/include/asm/uaccess.h
index a1f206b90753a..4916d5fbea5e3 100644
On 2020-03-20 01:55:27 [-0700], Davidlohr Bueso wrote:
> diff --git a/include/linux/swait.h b/include/linux/swait.h
> index 73e06e9986d4..6e5b5d0e64fd 100644
> --- a/include/linux/swait.h
> +++ b/include/linux/swait.h
> @@ -39,7 +26,7 @@
> *sleeper state.
> *
> * - the !exclusive mode; b
On 2020-03-20 01:55:25 [-0700], Davidlohr Bueso wrote:
> Let the caller know if wake_up_process() was actually called or not;
> some users can use this information for ad-hoc. Of course returning
> true does not guarantee that wake_up_process() actually woke anything
> up.
Wouldn't it make sense t
On 2020-03-19 22:36:57 [-0700], Davidlohr Bueso wrote:
> On Wed, 18 Mar 2020, Thomas Gleixner wrote:
>
> Right now I'm not sure what the proper fix should be.
I though that v2 has it fixed with the previous commit (acpi: Remove
header dependency). The kbot just reported that everything is fine.
L
On 2020-03-19 03:04:59 [-0700], Christoph Hellwig wrote:
> But I wonder how alive the whole PS3 support is to start with..
OtherOS can only be used on "old" PS3 which do not have have their
firmware upgraded past version 3.21, released April 1, 2010 [0].
It was not possible to install OtherOS on P
On 2020-03-18 21:43:09 [+0100], Thomas Gleixner wrote:
> --- a/arch/powerpc/platforms/ps3/device-init.c
> +++ b/arch/powerpc/platforms/ps3/device-init.c
> @@ -725,12 +728,12 @@ static int ps3_notification_read_write(s
> unsigned long flags;
> int res;
>
> - init_completion(&dev->d
On 2020-02-05 07:10:59 [+0530], maddy wrote:
> Yes, currently we dont have anything that prevents the timer
> callback to interrupt pmu::event_init. Nice catch. Thanks for
> pointing this out.
You are welcome.
> Looking at the code, per-cpu variable access are made to
> check for constraints and
I've been looking at usage of per-CPU variable cpu_hw_events in
arch/powerpc/perf/core-book3s.c.
power_pmu_enable() and power_pmu_disable() (pmu::pmu_enable() and
pmu::pmu_disable()) are accessing the variable and the callbacks are
invoked always with disabled interrupts.
power_pmu_event_init() (
With CONFIG_QUICC_ENGINE enabled and CONFIG_UCC_GETH + CONFIG_SERIAL_QE
disabled we have an unused variable (np). The code won't compile with
-Werror.
Move the np variable to the block where it is actually used.
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/platforms
On 2019-12-19 11:41:21 [+0100], Jason A. Donenfeld wrote:
> Hi folks,
Hi,
so this should duct tape it:
diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c
index f17ff1200eaae..ec044bdf362a1 100644
--- a/arch/powerpc/kernel/dbell.c
+++ b/arch/powerpc/kernel/dbell.c
@@ -60,16 +60
On 2019-12-05 20:01:41 [-0600], Frank Rowand wrote:
> Is there a memory usage issue for the systems that led to this thread?
No, no memory issue led to this thread. I was just testing my patch and
I assumed that I did something wrong in the counting/lock drop/lock
acquire/allocate path because the
On 2019-12-03 10:56:35 [-0600], Rob Herring wrote:
> > Another possibility would be to make the cache be dependent
> > upon not CONFIG_PPC. It might be possible to disable the
> > cache with a minimal code change.
>
> I'd rather not do that.
>
> And yes, as mentioned earlier I don't like the com
On 2019-11-29 20:14:47 [-0600], Frank Rowand wrote:
> The hash used is based on the assumptions you noted, and as stated in the
> code, that phandle property values are in a contiguous range of 1..n
> (not starting from zero), which is what dtc generates.
>
> We knew that for systems that do not m
I've been looking at phandle_cache and noticed the following: The raw
phandle value as generated by dtc starts at zero and is incremented by
one for each phandle entry. The qemu pSeries model is using Slof (which
is probably the same thing as used on real hardware) and this looks like
a poiner valu
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Thomas Gleixner
[bigeasy: +Kconfig]
Signed-off-by: Sebastian Andrzej Siewior
---
v2…v3: Don't mention die.c changes in the description.
v1…v2: Remove the changes to die.c.
arch/powerpc/Kconfig | 2 +-
arch/po
Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Thomas Gleixner
[bigeasy: +Kconfig]
Signed-off-by: Sebastian Andrzej Siewior
---
v1…v2: Remove the changes to die.c
arch/powerpc/Kconfig | 2 +-
arch/powerpc/kernel/entry_32.S | 4
On 2019-10-16 20:33:08 [+1100], Michael Ellerman wrote:
> Christophe Leroy writes:
> > Le 15/10/2019 à 21:17, Sebastian Andrzej Siewior a écrit :
> >> From: Thomas Gleixner
> >>
> >> CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_
On 2019-10-16 06:57:48 [+0200], Christophe Leroy wrote:
>
>
> Le 15/10/2019 à 21:17, Sebastian Andrzej Siewior a écrit :
> > From: Thomas Gleixner
> >
> > CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT.
> > Both PREEMPT and PREEMPT_
Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Thomas Gleixner
[bigeasy: +traps.c, Kconfig]
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/Kconfig | 2 +-
arch/powerpc/kernel/entry_32.S | 4 ++--
arch/powerpc/kernel
On 2019-04-05 02:25:44 [+1000], Nicholas Piggin wrote:
> Sebastian, are you able to test if this patch solves your problem?
yes, it does.
Tested-by: Sebastian Andrzej Siewior
> Thanks,
> Nick
Sebastian
On 2019-03-29 16:20:51 [+1100], Suraj Jitindar Singh wrote:
>
> Yeah the kernel must have used msgsndp which isn't implemented for TCG
> yet. We use doorbells in linux but only for threads which are on the
> same core.
It is msgsndp as per instruction decode.
> And when I try to construct a situ
With qemu-system-ppc64le -machine pseries -smp 4 I get:
|# chrt 1 hackbench
|Running in process mode with 10 groups using 40 file descriptors each (== 400
tasks)
|Each sender will pass 100 messages of 100 bytes
| Oops: Exception in kernel mode, sig: 4 [#1]
| LE PAGE_SIZE=64K MMU=Hash PREEMPT SMP
org
Signed-off-by: Anna-Maria Gleixner
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kvm/book3s_hv.c | 48 ++--
include/linux/cpuhotplug.h | 1 +
2 files changed, 12 insertions(+), 37 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/ar
hotplug call symmetric.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/kernel/sysfs.c | 50 +
1 file changed, 10 insertions(+), 40 deletions
Install the callbacks via the state machine.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/mm/mmu_context_nohash.c | 54 +++-
include/linux
online callback twice due to
rollback.
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/platforms/powermac/smp.c | 50 +--
include/linux/cpuhotplug.h
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.
v1…v2: manual callback invocation on boot-CPU (cpuhp is not up yet and
we need them all before additional CPUs are up).
Signed-off-by: Sebastian Andrzej Siewior
Cc: Andrew Morton
* Anton Blanchard | 2016-07-15 10:28:25 [+1000]:
>Hi Anna-Maria,
Hi Anton,
>> >> Install the callbacks via the state machine and let the core invoke
>> >> the callbacks on the already online CPUs.
>> >
>> > This is causing an oops on ppc64le QEMU, looks like a NULL
>> > pointer:
>>
>> Did yo
On 03/30/2016 02:41 AM, Michael Ellerman wrote:
> The merge window just closed, I'm still recovering.
>
> I've got it in my fixes branch locally, I'll probably push that today to
> linux-next.
Thank you.
>
> cheers
>
Sebastian
___
Linuxppc-dev mailin
On 2016-03-10 01:04:24 [+0530], Aneesh Kumar K.V wrote:
> Sebastian Andrzej Siewior writes:
*ping*
http://patchwork.ozlabs.org/patch/593943/
> > [ text/plain ]
> > hugepd_free() used __get_cpu_var() once. Nothing ensured that the code
> > accessing the variable did not mi
(). So now we have a put_cpu_var() which does
a preempt_enable() and nothing that does preempt_disable() so we
underflow the preempt counter.
Cc: Benjamin Herrenschmidt
Cc: Christoph Lameter
Cc: Michael Ellerman
Cc:
Signed-off-by: Sebastian Andrzej Siewior
---
v1…v2: - use get_cpu_var() in
On 03/08/2016 12:41 AM, Benjamin Herrenschmidt wrote:
> On Mon, 2016-03-07 at 21:04 +0530, Aneesh Kumar K.V wrote:
>> Sebastian Andrzej Siewior writes:
>>
>> While you are there, can you also fix the wrong indentation on line
>> 423
>> ?
>
> .../...
&g
(). So now we have a put_cpu_var() which does
a preempt_enable() and nothing that does preempt_disable() so we
underflow the preempt counter.
Cc: Benjamin Herrenschmidt
Cc: Christoph Lameter
Cc: Michael Ellerman
Cc: Tiejun Chen
Cc:
Signed-off-by: Sebastian Andrzej Siewior
---
arch/powerpc/
* Bogdan Purcareata | 2015-04-24 15:53:13 [+]:
>While converting the openpic emulation code to use a raw_spinlock_t enables
>guests to run on RT, there's still a performance issue. For interrupts sent in
>Signed-off-by: Bogdan Purcareata
Applied with Scott's Acked-by
Sebastian
* Bogdan Purcareata | 2015-04-24 15:53:11 [+]:
>0001: converts the openpic spinlock to a raw spinlock, in order to circumvent
>0002: disables in-kernel MPIC emulation for guest running on RT, in order to
Scott, I'm asking here for your explicit Acked-by on those two patches.
That you want it
On 02/26/2015 02:02 PM, Paolo Bonzini wrote:
>
>
> On 24/02/2015 00:27, Scott Wood wrote:
>> This isn't a host PIC driver. It's guest PIC emulation, some of which
>> is indeed not suitable for a rawlock (in particular, openpic_update_irq
>> which loops on the number of vcpus, with a loop body th
* Scott Wood | 2015-02-23 17:27:31 [-0600]:
>This isn't a host PIC driver. It's guest PIC emulation, some of which
>is indeed not suitable for a rawlock (in particular, openpic_update_irq
>which loops on the number of vcpus, with a loop body that calls
>IRQ_check() which loops over all pending IR
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