|
newidle balancing in NUMA domain?
|
| |
Hi, I wonder why it was decided to do newidle balancing in the NUMA domain? And with newidle_idx == 0 at that. This means that every time the CPU goes idle, every CPU in the system gets a remote cacheline or two hit. Not very nice O(n^2) behaviour on the interconnect. Not to mention trashing our NUMA locality.... more »
|
|
|
PATCH [0/2] - CHECKSTACK: sparc-stack-size and formatting
|
| |
Hi, I shamelessly stole the checkstack-script for a project of mine and now want to contribute what I changed: 1) CHECKSTACK: sparc: fix regex to match all stacksizes 2) CHECKSTACK: simplify text-formatting for displaying the stacksize For 1): as there are no comments in the script as to why the regex was... more »
|
|
|
perf: undo some recursion damage
|
| |
Make perf_swevent_get_recursion_con text return a context number and disable preemption. This could be used to remove the IRQ disable from the trace bit and index the per-cpu buffer with. Signed-off-by: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Frederic Weisbecker <fweis...@gmail.com> --- include/linux/perf_event.h | 8 ++--... more »
|
|
|
kexec: allow to shrink reserved memory
|
| |
This patch implements shrinking the reserved memory for crash kernel, if it is more than enough. For example, if you have already reserved 128M, now you just want 100M, you can do: ...Note, you can only do this before loading the crash kernel. Signed-off-by: WANG Cong <amw...@redhat.com> Cc: Neil Horman <nhor...@redhat.com>... more »
|
|
|
Weird I/O errors with USB hard drive not remounting filesystem readonly
|
| |
Okay, finally had some time to dismantle the machine in question and inserted the backup drive without the enclosure. Now that I was able to get smartctl to give me information on what was going on, it seems there's nothing wrong with the drive itself (no remapped sectors, nothing prefail or fail going wrong, drive's smart status is good) but it's had a history of... more »
|
|
|
linux-next: Tree for November 23
|
| |
Hi all, Changes since 20091120: The omap tree lost its conflict. The microblaze tree still has a build failure for which I reverted a commit. The mips tree gained a conflict against the microblaze tree. The infiniband tree lost its build failure. The net tree gained 2 conflicts against the net-current tree.... more »
|
|
|
GRATULERER: OFFICIAL PRIZE NOTIFICATION!
|
| |
GRATULERER: OFFICIAL PRIZE NOTIFICATION! You are a winner of £250,000 Pounds Sterling courtesy of Microsoft Corporation,United Kingdom. your secret pin code 092075ML and your reference number REF NO:MICRO-L/2009-END10. Please acknowledge the receipt of this mail with the details below to NAME: Ivan Nickerson... more »
|
|
|
irq: Add node_affinity CPU masks for smarter irqbalance hints
|
| |
This patchset adds a new CPU mask for SMP systems to the irq_desc struct. It also exposes an API for underlying device drivers to assist irqbalance in making smarter decisions when balancing, especially in a NUMA environment. For example, an ethernet driver with MSI-X may wish to limit the CPUs that an interrupt can be balanced within to... more »
|
|
|
|
