V3 Implement crashkernel=auto
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- v1 Latest8 patches 27 repliesIn review
V2 -> V3 from the cover letter
- Use more clever way to calculate reserved memory size, especially for IA64.
- Add that patch that implements shrinking reserved memory
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/8 | x86: add CONFIG_KEXEC_AUTO_RESERVEarch/ | +13 | 0 replies | |
| 2/8 | x86: implement crashkernel=autoarch/ include/ kernel/ | +77 | 0 replies | |
| 3/8 | ia64: add CONFIG_KEXEC_AUTO_RESERVEarch/ | +14 | 0 replies | |
| 4/8 | ia64: implement crashkernel=autoarch/ | +23 | 0 replies | |
| 5/8 | powerpc: add CONFIG_KEXEC_AUTO_RESERVEarch/ | +11 | 0 replies | |
| 6/8 | powerpc: implement crashkernel=autoarch/ | +8 | 0 replies | |
| 7/8 | doc: update the kdump documentDocumentation/ | +28 | 0 replies | |
| 8/8 | kexec: allow to shrink reserved memoryinclude/ kernel/ kernel/ | +94 | 20 replies |
Reviews trailers per patch
3 of 8 patches have a Reviewed-by or Acked-by.
| Patch | Neil Horman |
|---|---|
| 1/8 | A-b |
| 2/8 | |
| 3/8 | A-b |
| 4/8 | |
| 5/8 | A-b |
| 6/8 | |
| 7/8 | |
| 8/8 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [Patch 0/8] V3 Implement crashkernel=auto
V2 -> V3:
- Use more clever way to calculate reserved memory size, especially for IA64.
- Add that patch that implements shrinking reserved memory
V1 -> V2:
- Use include/asm-generic/kexec.h, suggested by Neil.
- Rename a local variable, suggested by Fenghua.
- Fix some style problems found by checkpatch.pl.
- Unify the Kconfig docs.
This series of patch implements automatically reserved memory for crashkernel, by introducing a new boot option "crashkernel=auto". This idea is from Neil.
In case of breaking user-space applications, it modifies this boot option after it decides how much memory should be reserved.
On different arch, the threshold and reserved memory size is different. Please refer patch 7/8 which contains an update for the documentation.
Patch 8/8 implements shrinking reserved memory at run-time.
Note: This patchset was only tested on x86_64 with differernt memory sizes.
--- Documentation/kdump/kdump.txt | 28 ++++++++++ arch/ia64/Kconfig | 14 +++++ arch/ia64/include/asm/kexec.h | 23 ++++++++ arch/powerpc/Kconfig | 11 ++++ arch/powerpc/include/asm/kexec.h | 8 +++ arch/x86/Kconfig | 13 ++++ arch/x86/include/asm/kexec.h | 1 include/asm-generic/kexec.h | 42 +++++++++++++++ include/linux/kexec.h | 3 + kernel/kexec.c | 104 +++++++++++++++++++++++++++++++++++++++ kernel/ksysfs.c | 21 +++++++ 11 files changed, 268 insertions(+)