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Description of problem: 1. Feature Overview: a) Name of feature: UV: add smp_affinity_list b) Feature Description: Attempting to set irq affinity where there is a large amount of cpus present on a system is difficult when you have to hand create the cpu bit masks. Add a _list variant of the command. 2. Feature Details: a) Architectures: 64-bit Intel EM64T b) Bugzilla Dependencies: none c) Drivers or hardware dependencies: d) Upstream acceptance information: Accepted into the -mm tree. e) External links: to be supplied f) Severity (H,M,L): high: we are relying on it for large UV1 and UV2 systems. g) Feature Needed by: 3. Business Justification: a) Why is this feature needed? It facilitates management of devices in large UV systems. b) What hardware does this enable? UV1 and UV2 SGI unique capability to move IRQs around c) Business impact? d) Other business drivers: 4. Primary contact at Red Hat, email, phone (chat) First_Name Last_Name xxx_xxxx Phone Number 5. Primary contact at Partner, email, phone (chat) Lori Gilbertson, loriann, 651-683-3433, N/A Partner technical contact, email, phone, chat George Beshers, gbeshers/gbeshers, 508-212-6362, gbeshers Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Since RHEL 6.1 External Beta has begun, and this bug remains unresolved, it has been rejected as it is not proposed as exception or blocker. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux.
The patch for this has been accepted upstream. As I read comment #2 the NACK was for rhel6.1 not rhel6.2. Given the information provided would you please assign the BZ to me? Thanks, George commit 4b060420a596095869a6d7849caa798d23839cd1 Author: Mike Travis <travis> Date: Tue May 24 17:13:12 2011 -0700 bitmap, irq: add smp_affinity_list interface to /proc/irq Manually adjusting the smp_affinity for IRQ's becomes unwieldy when the cpu count is large. Setting smp affinity to cpus 256 to 263 would be: echo 000000ff,00000000,00000000,00000000,00000000,00000000,00000000,00000000 > smp_affinity instead of: echo 256-263 > smp_affinity_list Think about what it looks like for cpus around say, 4088 to 4095. We already have many alternate "list" interfaces: /sys/devices/system/cpu/cpuX/indexY/shared_cpu_list /sys/devices/system/cpu/cpuX/topology/thread_siblings_list /sys/devices/system/cpu/cpuX/topology/core_siblings_list /sys/devices/system/node/nodeX/cpulist /sys/devices/pci***/***/local_cpulist Add a companion interface, smp_affinity_list to use cpu lists instead of cpu maps. This conforms to other companion interfaces where both a map and a list interface exists. This required adding a bitmap_parselist_user() function in a manner similar to the bitmap_parse_user() function. [akpm: make __bitmap_parselist() static] Signed-off-by: Mike Travis <travis> Cc: Thomas Gleixner <tglx> Cc: Jack Steiner <steiner> Cc: Lee Schermerhorn <lee.schermerhorn> Cc: Andy Shevchenko <andy.shevchenko> Signed-off-by: Andrew Morton <akpm> Signed-off-by: Linus Torvalds <torvalds>
George -- Per the flags, this BZ was reviewed by PM for RHEL 6.2 and was declined. It's currently being proposed for RHEL 6.3. Since the patch is upstream and you are willing to work on this item, can you please discuss with Peter for RHEL 6.2 inclusion? Thanks!
Exception approved by PeterM. Posted.
Patch(es) available on kernel-2.6.32-169.el6
Reproduced in 2.6.32-168.el6.x86_64 and verified in 2.6.32-169.el6.x86_64.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2011-1530.html