From: Atsushi Kumagai <kumagai-atsushi@xxxxxxxxxxxxxxxxx>
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 <kumagai-atsushi at mxc.nes.nec.co.jp>
---
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
