[PATCH RFC 00/11] makedumpfile: parallel processing

[Atsushi Kumagai]

Hello Zhou,

>This patch set implements parallel processing by means of multiple threads.
>With this patch set, it is available to use multiple threads to read
>and compress pages. This parallel process will save time.
>This feature only supports creating dumpfile in kdump-compressed format from
>vmcore in kdump-compressed format or elf format. Currently, sadump and
> xen kdump are not supported.

makedumpfile already has a parallel processing feature (--split),
it parallelizes not only page compression but also disk i/o, so
I think --split includes what you want to do by this patch.

In what case do you think this patch will be effective, what is
the advantage of this patch ?


Thanks
Atsushi Kumagai

>
>Qiao Nuohan (11):
>  Add readpage_kdump_compressed_parallel
>  Add mappage_elf_parallel
>  Add readpage_elf_parallel
>  Add read_pfn_parallel
>  Add function to initial bitmap for parallel use
>  Add filter_data_buffer_parallel
>  Add write_kdump_pages_parallel to allow parallel process
>  Add write_kdump_pages_parallel_cyclic to allow parallel process in
>    cyclic_mode
>  Initial and free data used for parallel process
>  Make makedumpfile available to read and compress pages parallelly
>  Add usage and manual about multiple threads process
>
> Makefile       |    2 +
> erase_info.c   |   29 +-
> erase_info.h   |    2 +
> makedumpfile.8 |   24 +
> makedumpfile.c | 1505 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> makedumpfile.h |   79 +++
> print_info.c   |   16 +
> 7 files changed, 1652 insertions(+), 5 deletions(-)
>
>
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