V5 Implement crashkernel=auto
Get series with b4
b4 am [email protected]Versions newest first
- v1 Latest8 patches 10 repliesIn review
V4 -> V5 from the cover letter
- Rename the global functions, as suggested by Andrew.
- Save some macros, as suggested by Andrew.
- Change the high threshold, from 32G to 4G.
- Change the low threshold on ppc, suggested by ppc developers.
- Make the mm part as a seperate function, suggest by Eric.
- Make the IA64 code more readable.
- Reorder the patchset again, since review from mm people is done.
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/ | +82 | 0 replies | |
| 3/8 | ia64: add CONFIG_KEXEC_AUTO_RESERVEarch/ | +14 | 0 replies | |
| 4/8 | ia64: implement crashkernel=autoarch/ | +44 | 5 replies | |
| 5/8 | powerpc: add CONFIG_KEXEC_AUTO_RESERVEarch/ | +11 | 0 replies | |
| 6/8 | powerpc: implement crashkernel=autoarch/ | +39 | 1 reply | |
| 7/8 | doc: update the kdump documentDocumentation/ | +29 | 0 replies | |
| 8/8 | kexec: allow to shrink reserved memoryinclude/ kernel/ kernel/ | +82 | 0 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] V5 Implement crashkernel=auto
V4 -> V5:
- Rename the global functions, as suggested by Andrew.
- Save some macros, as suggested by Andrew.
- Change the high threshold, from 32G to 4G.
- Change the low threshold on ppc, suggested by ppc developers.
- Make the mm part as a seperate function, suggest by Eric.
- Make the IA64 code more readable.
- Reorder the patchset again, since review from mm people is done.
V3 -> V4:
- Reorder the patches.
- Really free the reserved memory, instead of remapping it. (Thanks to KAMEZAWA Hiroyuki!)
- Release the reserved memory resource when the size is 0.
- Use strict_strtoul() instead of simple_strtoul().
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, which is useful when more than enough memory is reserved automatically.
This patchset _is_ already tested on x86_64, IA64 and ppc64.
--- Documentation/kdump/kdump.txt | 29 +++++++++ arch/ia64/Kconfig | 14 ++++ arch/ia64/include/asm/kexec.h | 44 +++++++++++++ arch/powerpc/Kconfig | 11 +++ arch/powerpc/include/asm/kexec.h | 39 ++++++++++++ arch/x86/Kconfig | 13 ++++ arch/x86/include/asm/kexec.h | 1 include/asm-generic/kexec.h | 16 +++++ include/linux/kexec.h | 2 kernel/kexec.c | 124 +++++++++++++++++++++++++++++++++++++++ kernel/ksysfs.c | 21 ++++++ 11 files changed, 314 insertions(+)