From: Nathan Fontenot <nfont@linux.vnet.ibm.com>
To: linuxppc-dev@ozlabs.org
Subject: [PATCH v3 0/12] NUMA CPU Reconfiguration using PRRN
Date: Mon, 22 Apr 2013 12:54:25 -0500 [thread overview]
Message-ID: <51757951.2080007@linux.vnet.ibm.com> (raw)
Newer firmware on Power systems can transparently reassign platform resources
(CPU and Memory) in use. For instance, if a processor or memory unit is
predicted to fail, the platform may transparently move the processing to an
equivalent unused processor or the memory state to an equivalent unused
memory unit. However, reassigning resources across NUMA boundaries may alter
the performance of the partition. When such reassignment is necessary, the
Platform Resource Reassignment Notification (PRRN) option provides a
mechanism to inform the Linux kernel of changes to the NUMA affinity of
its platform resources.
PRRN Events are RTAS events sent up through the event-scan mechanism on
Power. When these events are received the system needs can get the updated
device tree affinity information for the affected CPUs/memory via the
rtas update-nodes and update-properties calls. This information is then
used to update the NUMA affinity of the CPUs/Memory in the kernel.
This patch set adds the ability to recognize PRRN events, update the device
tree and kernel information for CPUs (memory will be handled in a later
patch), and add an interface to enable/disable toplogy updates from /proc.
Additionally, these updates solve an existing problem with the VPHN (Virtual
Processor Home Node) capability and allow us to re-enable this feature.
Nathan Fontenot
arch/powerpc/include/asm/firmware.h | 3
arch/powerpc/include/asm/prom.h | 46 ++--
arch/powerpc/include/asm/rtas.h | 2
arch/powerpc/kernel/prom_init.c | 98 ++--------
arch/powerpc/kernel/rtasd.c | 37 +++
arch/powerpc/mm/numa.c | 214 +++++++++++++++-------
arch/powerpc/platforms/pseries/firmware.c | 1
arch/powerpc/platforms/pseries/mobility.c | 24 +-
powerpc/arch/powerpc/include/asm/firmware.h | 4
powerpc/arch/powerpc/include/asm/machdep.h | 2
powerpc/arch/powerpc/include/asm/prom.h | 73 +++++++
powerpc/arch/powerpc/include/asm/rtas.h | 1
powerpc/arch/powerpc/include/asm/topology.h | 5
powerpc/arch/powerpc/kernel/prom_init.c | 2
powerpc/arch/powerpc/kernel/rtas.c | 10 +
powerpc/arch/powerpc/kernel/rtasd.c | 7
powerpc/arch/powerpc/mm/numa.c | 62 ++++++
powerpc/arch/powerpc/platforms/pseries/firmware.c | 49 ++++-
powerpc/arch/powerpc/platforms/pseries/mobility.c | 20 +-
powerpc/arch/powerpc/platforms/pseries/pseries.h | 5
powerpc/arch/powerpc/platforms/pseries/setup.c | 40 ++--
21 files changed, 500 insertions(+), 205 deletions(-)
Updates for v3 of the patchset:
1/12 - Updated to use a ppc_md interface to invoke device tree updates, this
corrects the build break previously seen in patch 2/12 for non-pseries
platforms.
2/12 - New patch in the series to correct the parsing of the buffer returned
from ibm,update-properties rtas call.
5/12 - The parsing of architecture vector 5 has been made more efficient.
7/12 - Correct #define used in call the firmware_has_feature()
8/12 - Updated calling of stop_machine() to only call it once per PRRN event.
12/12 - Added inclusion of topology.h to rtasd.c to correct a build failure
on non-pseries platforms.
next reply other threads:[~2013-04-22 18:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-22 17:54 Nathan Fontenot [this message]
2013-04-22 18:30 ` [PATCH v3 1/12] Create a powerpc update_devicetree interface Nathan Fontenot
2013-04-23 0:15 ` Benjamin Herrenschmidt
2013-04-23 18:46 ` Nathan Fontenot
2013-04-23 20:54 ` Benjamin Herrenschmidt
2013-04-22 18:31 ` [PATCH v3 2/12] Correct buffer parsing in update-properties Nathan Fontenot
2013-04-22 18:33 ` [PATCH v3 3/12] Add PRRN event handler Nathan Fontenot
2013-04-22 18:35 ` [PATCH v3 4/12] Move architecture vector definitions to prom.h Nathan Fontenot
2013-04-23 0:18 ` Benjamin Herrenschmidt
2013-04-22 18:38 ` [PATCH v3 5/12] Update firmware_has_feature() to check architecture bits Nathan Fontenot
2013-04-23 1:50 ` Stephen Rothwell
2013-04-23 18:56 ` Nathan Fontenot
2013-04-23 1:52 ` Stephen Rothwell
2013-04-22 18:40 ` [PATCH v3 6/12] Update numa.c to use updated firmware_has_feature() Nathan Fontenot
2013-04-22 18:41 ` [PATCH v3 7/12] Use stop machine to update cpu maps Nathan Fontenot
2013-04-23 0:24 ` Benjamin Herrenschmidt
2013-04-23 18:58 ` Nathan Fontenot
2013-04-22 18:44 ` [PATCH v3 8/12] " Nathan Fontenot
2013-04-22 18:45 ` [PATCH v3 9/12] Update NUMA VDSO information Nathan Fontenot
2013-04-22 18:46 ` [PATCH v3 10/12] Re-enable Virtual Private Home Node capabilities Nathan Fontenot
2013-04-22 18:47 ` [PATCH v3 11/12] Enable PRRN Event handling Nathan Fontenot
2013-04-22 18:47 ` [PATCH v3 12/12] Add /proc interface to control topology updates Nathan Fontenot
2013-04-23 2:00 ` Stephen Rothwell
2013-04-23 2:49 ` Michael Ellerman
2013-04-23 18:59 ` Nathan Fontenot
2013-04-23 2:02 ` Stephen Rothwell
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