CONFIG_NO_HZ_IDLE should be the default
Bug #1413968 reported by
Andy Whitcroft
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
Fix Released
|
Medium
|
Andy Whitcroft | ||
Bug Description
We have a hodge podge of CONFIG_NO_HZ_IDLE and CONFIG_NO_HZ_FULL selected across the architectures. From the documentation for CONFIG_NO_HZ_FULL this option does not even do anything positive until the user supplied a CPU list on the kernel command line, and it incurs a significant overhead overall. From the docs we should commonise on CONFIG_NO_HZ_IDLE, and separately evaluate the overhead.
Revision history for this message
| Andy Whitcroft (apw) wrote | #1 |
| Changed in linux (Ubuntu): | |
| status: | New → Confirmed |
| importance: | Undecided → Medium |
| assignee: | nobody → Andy Whitcroft (apw) |
| milestone: | none → ubuntu-15.01 |
| Changed in linux (Ubuntu): | |
| milestone: | ubuntu-15.01 → ubuntu-15.02 |
| Changed in linux (Ubuntu): | |
| status: | Confirmed → Fix Committed |
| Changed in linux (Ubuntu): | |
| milestone: | ubuntu-15.02 → ubuntu-15.03 |
Revision history for this message
| Andy Whitcroft (apw) wrote | #2 |
| Changed in linux (Ubuntu): | |
| status: | Fix Committed → Fix Released |
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Filed Bug #1413969 for the evaluation of the related options.