D8254.diff
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	Index: head/sys/amd64/amd64/minidump_machdep.c
	===================================================================
	--- head/sys/amd64/amd64/minidump_machdep.c
	+++ head/sys/amd64/amd64/minidump_machdep.c
	@@ -37,6 +37,7 @@
	#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 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 @@
	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;
	}