svn commit: r307540 - head/sys/amd64/amd64
Stephen J. Kiernan
stevek at FreeBSD.org
Mon Oct 17 22:57:42 UTC 2016
Author: stevek
Date: Mon Oct 17 22:57:41 2016
New Revision: 307540
URL: https://svnweb.freebsd.org/changeset/base/307540
Log:
Add sysctl to make amd64 minidump retry count tunable at runtime.
PR: 213462
Submitted by: RaviPrakash Darbha <rdarbha at juniper.net>
Reviewed by: cemi, markj
Approved by: sjg (mentor)
Obtained from: Juniper Networks
Differential Revision: https://reviews.freebsd.org/D8254
Modified:
head/sys/amd64/amd64/minidump_machdep.c
Modified: head/sys/amd64/amd64/minidump_machdep.c
==============================================================================
--- head/sys/amd64/amd64/minidump_machdep.c Mon Oct 17 22:48:29 2016 (r307539)
+++ head/sys/amd64/amd64/minidump_machdep.c Mon Oct 17 22:57:41 2016 (r307540)
@@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/kerneldump.h>
#include <sys/msgbuf.h>
+#include <sys/sysctl.h>
#include <sys/watchdog.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
@@ -68,6 +69,9 @@ static void *dump_va;
static size_t counter, progress, dumpsize;
CTASSERT(sizeof(*vm_page_dump) == 8);
+static int dump_retry_count = 5;
+SYSCTL_INT(_machdep, OID_AUTO, dump_retry_count, CTLFLAG_RWTUN,
+ &dump_retry_count, 0, "Number of times dump has to retry before bailing out");
static int
is_dumpable(vm_paddr_t pa)
@@ -447,7 +451,7 @@ minidumpsys(struct dumperinfo *di)
printf("\n");
if (error == ENOSPC) {
printf("Dump map grown while dumping. ");
- if (retry_count < 5) {
+ if (retry_count < dump_retry_count) {
printf("Retrying...\n");
goto retry;
}
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