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force event socket buffer size to 16MB

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Netlink events get lost when the kernel creates thousends of events
faster than udevd reads it. The default is 128 KB, which can carry
app. 500 events. Set it to 16 MB now.

  I have 4000 fibrechannel LUNs connected to my system.  There are two
  paths to the devices and two ports on the host connected via a switch.
  This gives 16000 when probed.
  I have had problems getting all of the entries in /dev created.
  -- Mark Haverkamp <markh@osdl.org>

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers
2005-10-11 21:06:50 +02:00
parent 133326dc74
commit a5c606f6c3
2 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
udev_libc_wrapper.h
+4
View File
@@ -53,6 +53,10 @@
#define NETLINK_KOBJECT_UEVENT 15
#endif
#ifndef SO_RCVBUFFORCE
#define SO_RCVBUFFORCE 33
#endif
#ifdef __KLIBC__
static inline int clearenv(void)
{
udevd.c
+4 -4
View File
@@ -686,7 +686,7 @@ static void reap_sigchilds(void)
static int init_udevd_socket(void)
{
struct sockaddr_un saddr;
const int buffersize = 1024 * 1024;
const int buffersize = 16 * 1024 * 1024;
socklen_t addrlen;
const int feature_on = 1;
int retval;
@@ -704,7 +704,7 @@ static int init_udevd_socket(void)
}
/* set receive buffersize */
setsockopt(udevd_sock, SOL_SOCKET, SO_RCVBUF, &buffersize, sizeof(buffersize));
setsockopt(udevd_sock, SOL_SOCKET, SO_RCVBUFFORCE, &buffersize, sizeof(buffersize));
/* the bind takes care of ensuring only one copy running */
retval = bind(udevd_sock, (struct sockaddr *) &saddr, addrlen);
@@ -723,7 +723,7 @@ static int init_udevd_socket(void)
static int init_uevent_netlink_sock(void)
{
struct sockaddr_nl snl;
const int buffersize = 1024 * 1024;
const int buffersize = 16 * 1024 * 1024;
int retval;
memset(&snl, 0x00, sizeof(struct sockaddr_nl));
@@ -738,7 +738,7 @@ static int init_uevent_netlink_sock(void)
}
/* set receive buffersize */
setsockopt(uevent_netlink_sock, SOL_SOCKET, SO_RCVBUF, &buffersize, sizeof(buffersize));
setsockopt(uevent_netlink_sock, SOL_SOCKET, SO_RCVBUFFORCE, &buffersize, sizeof(buffersize));
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
sizeof(struct sockaddr_nl));