From: Atsushi Kumagai <[email protected]> Date: Thu, 23 Aug 2012 17:53:59 +0900 Subject: [PATCH 05/16] [PATCH v3 5/12] Add function to get num_dumpable for cyclic mode.
get_num_dumpable_cyclic() gets the number of dumpable pages with cyclic mode. This function is used to get info->num_dumpable and it is necessary to decide the offset of kdump-compressed page data. Signed-off-by: Atsushi Kumagai <[email protected]> --- makedumpfile.c | 17 +++++++++++++++++ makedumpfile.h | 6 ++++++ 2 files changed, 23 insertions(+) diff --git a/makedumpfile.c b/makedumpfile.c index 64bc031..d007aea 100644 --- a/makedumpfile.c +++ b/makedumpfile.c @@ -4110,6 +4110,8 @@ create_dump_bitmap(void) if (info->flag_cyclic) { if (!prepare_bitmap_buffer_cyclic()) goto out; + + info->num_dumpable = get_num_dumpable_cyclic(); } else { if (!prepare_bitmap_buffer()) goto out; @@ -4571,6 +4573,21 @@ get_num_dumpable(void) return num_dumpable; } +unsigned long long +get_num_dumpable_cyclic(void) +{ + unsigned long long pfn, num_dumpable=0; + + for (pfn = 0; pfn < info->max_mapnr; pfn++) { + if (!update_cyclic_region(pfn)) + return FALSE; + + if (is_dumpable_cyclic(info->partial_bitmap2, pfn)) + num_dumpable++; + } + + return num_dumpable; +} int write_elf_load_segment(struct cache_data *cd_page, unsigned long long paddr, diff --git a/makedumpfile.h b/makedumpfile.h index 1a49aa2..e336814 100644 --- a/makedumpfile.h +++ b/makedumpfile.h @@ -938,6 +938,7 @@ struct DumpInfo { char *partial_bitmap2; unsigned long long cyclic_start_pfn; unsigned long long cyclic_end_pfn; + unsigned long long num_dumpable; /* * sadump info: @@ -1511,4 +1512,9 @@ struct elf_prstatus { #endif +/* + * Function Prototype. + */ +unsigned long long get_num_dumpable_cyclic(void); + #endif /* MAKEDUMPFILE_H */ -- 1.7.9.2 _______________________________________________ kexec mailing list [email protected] http://lists.infradead.org/mailman/listinfo/kexec
