From: Nathan Fontenot <nfont@linux.vnet.ibm.com>
To: linuxppc-dev@ozlabs.org
Subject: [PATCH v2 0/11] NUMA CPU Reconfiguration using PRRN
Date: Mon, 25 Mar 2013 13:43:52 -0500 [thread overview]
Message-ID: <51509AE8.8070803@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 exisitng problem with the VPHN (Virtual
Processor Home Node) capability and allow us to re-enable this feature.
Nathan Fontenot
Updates for Version 2 of this patchset
- Merged the functionality of platform_has_feature into the existing
firmware_has_feature routine.
- Corrected the new way certain bits in the architecture vector are
defined based on config options.
---
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 | 35 ++++
arch/powerpc/mm/numa.c | 183 ++++++++++++++--------
arch/powerpc/platforms/pseries/firmware.c | 1
powerpc/arch/powerpc/include/asm/firmware.h | 4
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/rtasd.c | 6
powerpc/arch/powerpc/mm/numa.c | 62 +++++++
powerpc/arch/powerpc/platforms/pseries/firmware.c | 67 +++++++-
powerpc/arch/powerpc/platforms/pseries/mobility.c | 21 +-
powerpc/arch/powerpc/platforms/pseries/pseries.h | 5
powerpc/arch/powerpc/platforms/pseries/setup.c | 40 +++-
18 files changed, 455 insertions(+), 199 deletions(-)
next reply other threads:[~2013-03-25 18:44 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-25 18:43 Nathan Fontenot [this message]
2013-03-25 18:51 ` [PATCH v2 1/11] Expose pseries devicetree_update() Nathan Fontenot
2013-04-04 3:09 ` Paul Mackerras
2013-03-25 18:52 ` [PATCH v2 2/11] Add PRRN Event Handler Nathan Fontenot
2013-04-04 3:34 ` Paul Mackerras
2013-04-04 7:16 ` Benjamin Herrenschmidt
2013-04-05 15:43 ` Nathan Fontenot
2013-04-10 8:30 ` Michael Ellerman
2013-04-15 20:12 ` Nathan Fontenot
2013-03-25 18:53 ` [PATCH v2 3/11] Move architecture vector definitions to prom.h Nathan Fontenot
2013-03-25 18:54 ` [PATCH v2 4/11] Update firmware_has_feature() to check architecture bits Nathan Fontenot
2013-04-04 4:19 ` Paul Mackerras
2013-03-25 18:56 ` [PATCH v2 5/11] Update numa.c to use updated firmware_has_feature() Nathan Fontenot
2013-04-04 4:20 ` Paul Mackerras
2013-03-25 18:57 ` [PATCH v2 6/11] Update CPU Maps Nathan Fontenot
2013-04-04 4:42 ` Paul Mackerras
2013-04-05 18:02 ` Nathan Fontenot
2013-03-25 18:58 ` [PATCH v2 7/11] Use stop machine to update cpu maps Nathan Fontenot
2013-04-04 4:46 ` Paul Mackerras
2013-04-05 18:22 ` Nathan Fontenot
2013-04-23 0:23 ` Benjamin Herrenschmidt
2013-03-25 18:59 ` [PATCH v2 8/11] Update numa cpu vdso info Nathan Fontenot
2013-03-25 19:00 ` [PATCH v2 9/11] Re-enable Virtual Private Home Node capabilities Nathan Fontenot
2013-03-25 19:01 ` [PATCH v2 10/11] Enable PRRN Nathan Fontenot
2013-03-25 19:02 ` [PATCH v2 11/11] Add /proc interface to control topology updates Nathan Fontenot
2013-04-10 6:59 ` Michael Ellerman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=51509AE8.8070803@linux.vnet.ibm.com \
--to=nfont@linux.vnet.ibm.com \
--cc=linuxppc-dev@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).