time and space saving patches for large memories
Get series with b4
b4 am [email protected]Versions newest first
- v1 Latest2 patches 6 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | use raw i/o and root device to use less memorymakedumpfile.c makedumpfile.h print_info.c | +347 | 6 replies | |
| 2/2 | exclude page structures of non-dumped pagesdiskdump_mod.h makedumpfile.c makedumpfile.h +1 more | +735 | 0 replies |
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.
Cover letter [PATCH 0/2] time and space saving patches for large memories
From: Cliff Wickman <[email protected]>
Back in early 2014 I submitted several patches for your consideration, most of which concerned saving time and disk space when dumping very large memories.
I offer two of them again, as being the most important elements for the practical dumping of very large memories.
[PATCH 1/2] use raw i/o and root device to use less memory
[PATCH 2/2] exclude page structures of non-dumped pages
The second patch has a few dependencies on the first. But they are logically separate.
They apply to the 1.5.7 source.
As an example of the importance of these two concepts:
We dump a 2TB system using crashkernel=450M. Without the patches we write a 3.6G dump in about 12 minutes. With the patches we write a 590M dump in about 4 minutes.
And the savings multiply as memory size grows.
_______________________________________________
kexec mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/kexec