On Wed, 2010-04-14 at 16:46 +1000, Paul Mackerras wrote:
> Ben, please put this in your tree of fixes to go to Linus for 2.6.34,
> since it fixes a potential panic.
Should it go to -stable as well ? How far back ?
Cheers,
Ben.
___
Linuxppc-dev mailing
Anton Blanchard found that large POWER systems would occasionally
crash in the exception exit path when profiling with perf_events.
The symptom was that an interrupt would occur late in the exit path
when the MSR[RI] (recoverable interrupt) bit was clear. Interrupts
should be hard-disabled at this
In message <1271161767.4807.1281.ca...@twins> you wrote:
> On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> > Peter: Since this is based mainly off your initial patch, it should
> > have your signed-off-by too, but I didn't want to add without your
> > permission. Can I add it?
>
> Of
From: Ian Munsie
This patch adds mappings from the register numbers from DWARF to the
register names used in the PowerPC Regs and Stack Access API. This
allows perf probe to be used to record variable contents on PowerPC.
This patch depends on functionality in the powerpc/next tree, though it
wi
From: Ian Munsie
The perf userspace tool included some architecture specific code to map
registers from the DWARF register number into the names used by the regs
and stack access API.
This patch moves the architecture specific code out into a separate
arch/x86 directory along with the infrastruc
These patches add the required mappings to use perf probe on PowerPC.
Functionality wise it requires the patch titled "powerpc: Add kprobe-based
event tracer" from the powerpc-next tree to provide the
HAVE_REGS_AND_STACK_ACCESS_API required for CONFIG_KPROBE_EVENT. The code will
still compile clea
In message <1271161766.4807.1280.ca...@twins> you wrote:
> On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> > When calculating capacity we use the following calculation:
> >=20
> >capacity =3D DIV_ROUND_CLOSEST(power, SCHED_LOAD_SCALE);
> >=20
> > In SMT2, power will be 1178/2 (p
On Wed, Apr 07, 2010 at 06:03:31PM +1000, Benjamin Herrenschmidt wrote:
> Ok so too many problems with your last patch, I didn't have time to fix
> them all, so it's not going into -next this week.
>
> Please, test with a variety of defconfigs (iseries, cell, g5 for
> example), and especially with
Implement perf-events based hw-breakpoint interfaces for PPC64 processors.
These interfaces help arbitrate requests from various users and schedules
them as appropriate.
Signed-off-by: K.Prasad
---
arch/powerpc/Kconfig |1
arch/powerpc/include/asm/cputable.h |4
Data address breakpoint exceptions are currently handled along with page-faults
which require interrupts to remain in enabled state. Since exception handling
for data breakpoints aren't pre-empt safe, we handle them separately.
Signed-off-by: K.Prasad
---
arch/powerpc/kernel/exceptions-64s.S |
Hi Ben,
Please find a new version of the patchset. It contains small, yet
significant number of changes to address the build issues you pointed out
(details of which are listed in the changelog below).
Changelog - ver XVII
(Version XVI: linuxppc-dev ref: 20100330095809
On Wed, 2010-04-14 at 12:35 +1000, Benjamin Herrenschmidt wrote:
> Hi Peter !
>
> I -may- have found a bug with mutex adaptative spinning. We hit it when
> torture testing CPU unplug.
.../...
In fact, I wonder if there's another potential problem:
If the owner is actually running, it may do so
Hi Peter !
I -may- have found a bug with mutex adaptative spinning. We hit it when
torture testing CPU unplug.
Basically, what happens is mutex_spin_on_owner() returns 1 if the owner
CPU is offline. That means that the caller (__mutex_lock_common()) will
spin until the mutex is released since the
On Tue, 2010-04-13 at 05:29 -0700, Peter Zijlstra wrote:
> On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> > With the asymmetric packing infrastructure, fix_small_imbalance is
> > causing idle higher threads to pull tasks off lower threads.
> >
> > This is being caused by an off-by-o
On Tuesday 13 April 2010 21:16:44 Benjamin Herrenschmidt wrote:
> On Tue, 2010-04-13 at 16:02 +1000, Mark Nelson wrote:
> > That's a good question, and one that I probably should have added to
> > the
> > commit message.
> > But, following through, it looks like we end up calling into
> > __remove_
Andrew Morton wrote:
> On Tue, 6 Apr 2010 17:22:38 -0400 Alexandre Bounine
wrote:
>
> >
> > From: Alexandre Bounine
> >
> > Add RapidIO Port-Write message handling in the context
> > of Error Management Extensions Specification Rev.1.3.
> >
> > ...
> >
> > +static struct rio_dev *rio_get_comptag
> -Original Message-
> From: David Miller [mailto:da...@davemloft.net]
> Sent: Tuesday, April 13, 2010 2:34 AM
> To: grant.lik...@secretlab.ca
> Cc: John Linn; net...@vger.kernel.org; linuxppc-...@ozlabs.org;
jwbo...@linux.vnet.ibm.com;
> eric.duma...@gmail.com; john.willi...@petalogix.com;
>From: Sparks, Sam
>Sent: Thursday, April 08, 2010 4:15 PM
>
>Howdy All,
>
>I have (almost) successfully upgraded from Linux 2.6.22 to 2.6.26 (both
>downloaded from debian) on my mpc8347 powerpc, but I think I may be
>missing a required change to my dts regarding the IPIC or maybe a
change
>in how
On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> Peter: Since this is based mainly off your initial patch, it should
> have your signed-off-by too, but I didn't want to add without your
> permission. Can I add it?
Of course! :-)
This thing does need a better changelog though, and mayb
On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> need_active_balance() gates the asymmetric packing based due to power
> save logic, but for packing we don't care.
This explanation lacks a how/why.
So the problem is that need_active_balance() ends up returning false and
prevents the ac
On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> When calculating capacity we use the following calculation:
>
>capacity = DIV_ROUND_CLOSEST(power, SCHED_LOAD_SCALE);
>
> In SMT2, power will be 1178/2 (provided we are not scaling power with
> freq say) and SCHED_LOAD_SCALE will
On Fri, 2010-04-09 at 16:21 +1000, Michael Neuling wrote:
> With the asymmetric packing infrastructure, fix_small_imbalance is
> causing idle higher threads to pull tasks off lower threads.
>
> This is being caused by an off-by-one error.
>
> Signed-off-by: Michael Neuling
> ---
> I'm not su
On Tue, 2010-04-13 at 16:02 +1000, Mark Nelson wrote:
> That's a good question, and one that I probably should have added to
> the
> commit message.
> But, following through, it looks like we end up calling into
> __remove_section() from mm/memory_hotplug.c and if
> CONFIG_SPARSEMEM_VMEMMAP is enab
From: Manfred Rudigier
Date: Fri, 9 Apr 2010 11:10:35 +0200
> If a packet has the skb_shared_tx->hardware flag set the device is
> instructed to generate a TX timestamp and write it back to memory after
> the frame is transmitted. During the clean_tx_ring operation the
> timestamp will be extract
From: Manfred Rudigier
Date: Fri, 9 Apr 2010 11:10:03 +0200
> The device is configured to insert hardware timestamps into all
> received packets. The RX timestamps are extracted from the padding
> alingment bytes during the clean_rx_ring operation and copied into the
> skb_shared_hwtstamps struct
Hi Masami,
Thanks for the feedback
Excerpts from Masami Hiramatsu's message of Mon Apr 12 22:37:03 +1000 2010:
> Could you add a check whether the get_arch_regstr() is defined
> (or dwarf-regs.h is exist) in Makefile?
> If it is not defined, we'd better drop dwarf support(so set NO_DWARF),
> beca
From: Grant Likely
Date: Fri, 9 Apr 2010 12:10:21 -0600
> On Thu, Apr 8, 2010 at 11:08 AM, John Linn wrote:
>> This patch adds support for using the LL TEMAC Ethernet driver on
>> non-Virtex 5 platforms by adding support for accessing the Soft DMA
>> registers as if they were memory mapped inste
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