Introduce --cyclic option to enable cyclic processing. If --cyclic option is
specified, then makedumpfile works cyclically and the memory usage will be constant.
Usage:
# makedumpfile --cyclic /proc/vmcore dumpfile
Signed-off-by: Atsushi Kumagai <kumagai-atsushi at mxc.nes.nec.co.jp>
---
makedumpfile.8 | 12 ++++++++++++
makedumpfile.c | 4 ++++
makedumpfile.h | 1 +
print_info.c | 9 +++++++++
4 files changed, 26 insertions(+)
diff --git a/makedumpfile.8 b/makedumpfile.8
index 1fb9756..6ab2599 100644
--- a/makedumpfile.8
+++ b/makedumpfile.8
@@ -346,6 +346,18 @@ on the following example.
.br
# makedumpfile \-\-reassemble dumpfile1 dumpfile2 dumpfile
+
+.TP
+\fB\-\-cyclic\fR
+Creating bitmaps and writing pages cyclically for constant target memory range.
+As a result, makedumpfile can works in constant memory space regardless of
+system memory size.
+This feature is \fITESTING VERSION\fR now.
+.br
+.B Example:
+.br
+# makedumpfile \-\-cyclic \-d 31 \-x vmlinux /proc/vmcore dumpfile
+
.TP
\fB\-\-xen-syms\fR \fIXEN-SYMS\fR
Specify the \fIXEN-SYMS\fR with debug information to analyze the xen's memory usage.
diff --git a/makedumpfile.c b/makedumpfile.c
index d024e95..87bd680 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -6945,6 +6945,7 @@ static struct option longopts[] = {
{"config", required_argument, NULL, 'C'},
{"help", no_argument, NULL, 'h'},
{"diskset", required_argument, NULL, 'k'},
+ {"cyclic", no_argument, NULL, 'Y'},
{0, 0, 0, 0}
};
@@ -7053,6 +7054,9 @@ main(int argc, char *argv[])
case 'y':
info->name_xen_syms = optarg;
break;
+ case 'Y':
+ info->flag_cyclic = TRUE;
+ break;
case 'z':
info->flag_read_vmcoreinfo = 1;
info->name_vmcoreinfo = optarg;
diff --git a/makedumpfile.h b/makedumpfile.h
index 6f5489d..287e055 100644
--- a/makedumpfile.h
+++ b/makedumpfile.h
@@ -801,6 +801,7 @@ struct DumpInfo {
int flag_rearrange; /* flag of creating dumpfile from
flattened format */
int flag_split; /* splitting vmcore */
+ int flag_cyclic; /* cyclic processing to keep memory consumption */
int flag_reassemble; /* reassemble multiple dumpfiles into one */
int flag_refiltering; /* refilter from kdump-compressed file */
int flag_force; /* overwrite existing stuff */
diff --git a/print_info.c b/print_info.c
index 61cafed..0d8a7b3 100644
--- a/print_info.c
+++ b/print_info.c
@@ -62,6 +62,10 @@ print_usage(void)
MSG("\n");
MSG(" Reassemble multiple DUMPFILEs:\n");
MSG(" # makedumpfile --reassemble DUMPFILE1 DUMPFILE2 [DUMPFILE3 ..] DUMPFILE\n");
+ MSG(" DUMPFILE2 [DUMPFILE3 ..]\n");
+ MSG("\n");
+ MSG(" Creating DUMPFILE with cyclic processing:\n");
+ MSG(" # makedumpfile --cyclic [OPTION] [-x VMLINUX|-i VMCOREINFO] VMCORE DUMPFILE\n");
MSG("\n");
MSG(" Generating VMCOREINFO:\n");
MSG(" # makedumpfile -g VMCOREINFO -x VMLINUX\n");
@@ -162,6 +166,11 @@ print_usage(void)
MSG(" Reassemble multiple DUMPFILEs, which are created by --split option,\n");
MSG(" into one DUMPFILE. dumpfile1 and dumpfile2 are reassembled into dumpfile.\n");
MSG("\n");
+ MSG(" [--cyclic]:\n");
+ MSG(" Creating bitmaps and writing pages for certain target memory range.\n");
+ MSG(" As a result, makedumpfile can works in constant memory space regardless of \n");
+ MSG(" system memory size. This feature is TESTING VERSION now.\n");
+ MSG("\n");
MSG(" [--xen-syms XEN-SYMS]:\n");
MSG(" Specify the XEN-SYMS to analyze Xen's memory usage.\n");
MSG("\n");
--
1.7.9.2
