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iscsi-target: Bump default TCP listen backlog to 256

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This patch bumps the default TCP listen backlog within iscsit_setup_np()
from 5 to 256, in order to reduce the overall latency caused by a small
backlog with 100's of simultaneous login attempts directed to the same
single network portal.

Also add a ISCSIT_TCP_BACKLOG macro in iscsi_target_core.h.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2013-09-09 16:24:46 -07:00
parent f730f9158f
commit 837f6452b8
2 changed files with 2 additions and 1 deletions
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1
drivers/target/iscsi/iscsi_target_core.h
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@ -19,6 +19,7 @@
#define WHITE_SPACE " \t\v\f\n\r"
#define ISCSIT_MIN_TAGS 16
#define ISCSIT_EXTRA_TAGS 8
#define ISCSIT_TCP_BACKLOG 256
/* struct iscsi_node_attrib sanity values */
#define NA_DATAOUT_TIMEOUT 3

2
drivers/target/iscsi/iscsi_target_login.c
View file

@ -873,7 +873,7 @@ int iscsit_setup_np(
struct __kernel_sockaddr_storage *sockaddr)
{
struct socket *sock = NULL;
int backlog = 5, ret, opt = 0, len;
int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len;
switch (np->np_network_transport) {
case ISCSI_TCP: