Linux Kernel Markers - Use Immediate Values Optimization
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- v1 Latest6 patches 1 replyIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/6 | Immediate Values - Move Kprobes x86 restore_interrupt to kdebug.hinclude/ include/ include/ | +12 | 0 replies | |
| 2/6 | Add __discard section to x86arch/ arch/ | +2 | 0 replies | |
| 3/6 | Immediate Values - x86 Optimization NMI and MCE supportarch/ arch/ arch/ +2 more | +323 | 1 reply | |
| 4/6 | Immediate Values - Powerpc Optimization NMI MCE supportarch/ arch/ include/ | +92 | 0 replies | |
| 5/6 | Immediate Values Use Arch NMI and MCE Supportinclude/ kernel/ | +4 | 0 replies | |
| 6/6 | Linux Kernel Markers - Use Immediate ValuesDocumentation/ include/ kernel/ +1 more | +52 | 0 replies |
Reviews trailers per patch
2 of 6 patches have a Reviewed-by or Acked-by.
| Patch | H. Peter Anvin | Ananth N Mavinakayanahalli |
|---|---|---|
| 1/6 | A-b | |
| 2/6 | A-b | |
| 3/6 | ||
| 4/6 | ||
| 5/6 | ||
| 6/6 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [patch 0/6] Linux Kernel Markers - Use Immediate Values Optimization
Hi,
The Markers are meant to have a _very_ low impact on performance (even on d-cache hits) when disabled. This is provided by the Immediate Values.
However, to be able to instrument code called from traps (NMI, MCE handler, all code called by there functions and all traps that can be triggered by these), the rock-solid implementation of the immediate values seems required. It, however, comes at the cost of some added complexity.
This patch applies on 2.6.24-rc4-git3, after the
Text Edit Lock
Immediate Values (redux)
Profiling Use Immediate Values
patchsets.
It could be interesting to queue this for 2.6.25 so we can also add basic kernel instrumentation (patches follow).
Mathieu
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Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68