From: Atsushi Kumagai <kumagai-atsushi@xxxxxxxxxxxxxxxxx>
Date: Thu, 23 Aug 2012 17:53:55 +0900
Subject: [PATCH 04/16] [PATCH v3 4/12] Add function to update target region.
update_cyclic_region() updates target region with recalculating partial bitmap
when traverse target region.
This function helps cyclic mode to update partial bitmap for target region.
Signed-off-by: Atsushi Kumagai <kumagai-atsushi at mxc.nes.nec.co.jp>
---
makedumpfile.c | 21 +++++++++++++++++++++
makedumpfile.h | 9 +++++++++
2 files changed, 30 insertions(+)
diff --git a/makedumpfile.c b/makedumpfile.c
index f706e29..64bc031 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -3894,6 +3894,27 @@ exclude_unnecessary_pages_cyclic(void)
}
int
+update_cyclic_region(unsigned long long pfn)
+{
+ if (is_cyclic_region(pfn))
+ return TRUE;
+
+ info->cyclic_start_pfn = round(pfn, PFN_CYCLIC);
+ info->cyclic_end_pfn = info->cyclic_start_pfn + PFN_CYCLIC;
+
+ if (info->cyclic_end_pfn > info->max_mapnr)
+ info->cyclic_end_pfn = info->max_mapnr;
+
+ if (!create_1st_bitmap_cyclic())
+ return FALSE;
+
+ if (!exclude_unnecessary_pages_cyclic())
+ return FALSE;
+
+ return TRUE;
+}
+
+int
copy_bitmap(void)
{
off_t offset;
diff --git a/makedumpfile.h b/makedumpfile.h
index bf5dd43..1a49aa2 100644
--- a/makedumpfile.h
+++ b/makedumpfile.h
@@ -1418,6 +1418,15 @@ is_dumpable_cyclic(char *bitmap, unsigned long long pfn)
}
static inline int
+is_cyclic_region(unsigned long long pfn)
+{
+ if (pfn < info->cyclic_start_pfn || info->cyclic_end_pfn <= pfn)
+ return FALSE;
+ else
+ return TRUE;
+}
+
+static inline int
is_zero_page(unsigned char *buf, long page_size)
{
size_t i;
--
1.7.9.2
