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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>
This commit is contained in:
Hariprasad Shenai 2016-06-08 18:09:08 +05:30 committed by David S. Miller
parent df0437e147
commit 40e4e713eb
1 changed files with 3 additions and 1 deletions
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4
net/core/dev.c
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@ -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 @@ EXPORT_SYMBOL(netif_set_real_num_rx_queues);
*/
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);