net: Reduce queue allocation to one in kdump kernel
When in kdump kernel, reduce memory usage by only using a single Queue
Set for multiqueue devices. So make netif_get_num_default_rss_queues()
return one, when in kdump kernel.
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index e0bcc39..c43c9d2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -139,6 +139,7 @@
#include <linux/hrtimer.h>
#include <linux/netfilter_ingress.h>
#include <linux/sctp.h>
+#include <linux/crash_dump.h>
#include "net-sysfs.h"
@@ -2249,7 +2250,8 @@
*/
int netif_get_num_default_rss_queues(void)
{
- return min_t(int, DEFAULT_MAX_NUM_RSS_QUEUES, num_online_cpus());
+ return is_kdump_kernel() ?
+ 1 : min_t(int, DEFAULT_MAX_NUM_RSS_QUEUES, num_online_cpus());
}
EXPORT_SYMBOL(netif_get_num_default_rss_queues);