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* RE: Problems with e1000 driver and ksoftirqd_CPU0
@ 2002-06-13 16:54 Leech, Christopher
  2002-06-13 14:03 ` Renato
  0 siblings, 1 reply; 3+ messages in thread
From: Leech, Christopher @ 2002-06-13 16:54 UTC (permalink / raw)
  To: 'Renato', linux-kernel

Due to time constraints and wanting to have a stable and tested driver on
the distribution, Red Hat's latest kernels have the last released version of
e1000 before we started doing some major cleanup in preparation for merging
e1000 into the standard kernel distribution.  One of the "features" that was
removed since then is the use of a tasklet for receive buffer allocation,
which under certain loads can be a horrible thing.

I would highly recommend trying e1000 4.2.17, either the version found in
the latest 2.5 kernels or from Intel.  The version on Intel's site has some
additional backwards compatibility code for 2.2 support and a few
non-standard features that can easily be disabled at the top of the makefile
if you don't want them.  On the plus side it's setup to easily build outside
of the kernel source tree if you want to test it without patching and
rebuilding the kernel.

J.A. Magallon posted a backport of the driver from 2.5 to 2.4 early last
week @ http://giga.cps.unizar.es/~magallon/linux/driver/e1000-4.2.17-k1.bz2

The latest version from Intel can always be found @
http://support.intel.com/support/go/linux/e1000.htm

--
Chris Leech <christopher.leech@intel.com>
Network Software Engineer
LAN Access Division, Intel Corporation

> -----Original Message-----
> From: Renato [mailto:webmaster@cienciapura.com.br] 
> Sent: Tuesday, June 11, 2002 3:50 AM
> To: linux-kernel@vger.kernel.org
> Subject: Problems with e1000 driver and ksoftirqd_CPU0
> 
> 
> Hi all,
> 
> I'm just using the latest kernel from RedHat - 2.4.18-4smp ( which I 
> suppose it mostly -ac series ) and I'm having real problems with an 
> Ethernet Gigabit network. It looks like "ksoftirqd_CPU0" eats 
> up all the 
> CPU processing with a traffic of just 55 Mbps !! ( it's not 
> my hardware... 
> I'm using a Dual Xeon 2Ghz and with kernel 2.4.9 it could 
> handle easily 85 
> Mbps ) 

^ permalink raw reply	[flat|nested] 3+ messages in thread
* sysctl net.ipv4.icmp_default_ttl
@ 2002-06-11 13:33 Lev V. Vanyan
  2002-06-11 10:50 ` Problems with e1000 driver and ksoftirqd_CPU0 Renato
  0 siblings, 1 reply; 3+ messages in thread
From: Lev V. Vanyan @ 2002-06-11 13:33 UTC (permalink / raw)
  To: linux-kernel

-----BEGIN PGP SIGNED MESSAGE-----

I wrote a new sysctl flag allowing to control Time To Live for ICMP packages. 
I've applied it to my 2.4.18 and it runs stable on fortress.mirotel.net 
(Linux i386).

PS: This is my first kernel patch, so it would be better if community will 
forgive me in case i've done something wrong :)


- --- linux/net/ipv4/sysctl_net_ipv4.c	Wed Oct 31 01:08:12 2001
+++ linux-2.4.18/net/ipv4/sysctl_net_ipv4.c	Mon Jun 10 21:51:08 2002
@@ -22,6 +22,7 @@
 extern int sysctl_icmp_echo_ignore_all;
 extern int sysctl_icmp_echo_ignore_broadcasts;
 extern int sysctl_icmp_ignore_bogus_error_responses;
+extern int sysctl_icmp_default_ttl;
 
 /* From ip_fragment.c */
 extern int sysctl_ipfrag_low_thresh;
@@ -176,6 +177,9 @@
 	{NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES, 
"icmp_ignore_bogus_error_responses",
 	 &sysctl_icmp_ignore_bogus_error_responses, sizeof(int), 0644, NULL,
 	 &proc_dointvec},
+	{NET_IPV4_ICMP_DEFAULT_TTL, "icmp_default_ttl",
+	&sysctl_icmp_default_ttl,sizeof(int), 0644,NULL,
+	&proc_dointvec},
 	{NET_IPV4_ROUTE, "route", NULL, 0, 0555, ipv4_route_table},
 #ifdef CONFIG_IP_MULTICAST
 	{NET_IPV4_IGMP_MAX_MEMBERSHIPS, "igmp_max_memberships",
- --- linux/net/ipv4/ip_output.c	Thu Oct 18 00:16:39 2001
+++ linux-2.4.18/net/ipv4/ip_output.c	Tue Jun 11 15:58:07 2002
@@ -84,6 +84,9 @@
 
 int sysctl_ip_dynaddr = 0;
 int sysctl_ip_default_ttl = IPDEFTTL;
+#ifdef CONFIG_SYSCTL
+extern int sysctl_icmp_default_ttl;
+#endif
 
 /* Generate a checksum for an outgoing IP datagram. */
 __inline__ void ip_send_check(struct iphdr *iph)
@@ -572,10 +575,17 @@
 				 */
 				mf = htons(IP_MF);
 			}
- -			if (rt->rt_type == RTN_MULTICAST)
- -				iph->ttl = sk->protinfo.af_inet.mc_ttl;
- -			else
- -				iph->ttl = sk->protinfo.af_inet.ttl;
+#ifdef CONFIG_SYSCTL
+			if(sk->protocol != IPPROTO_ICMP) {
+#endif
+				if (rt->rt_type == RTN_MULTICAST) 
+					iph->ttl = sk->protinfo.af_inet.mc_ttl;
+				else
+					iph->ttl = sk->protinfo.af_inet.ttl;
+#ifdef CONFIG_SYSCTL			
+			}
+				else iph->ttl = sysctl_icmp_default_ttl;
+#endif
 			iph->protocol = sk->protocol;
 			iph->check = 0;
 			iph->saddr = rt->rt_src;
@@ -693,10 +703,19 @@
 		iph->tos=sk->protinfo.af_inet.tos;
 		iph->tot_len = htons(length);
 		iph->frag_off = df;
- -		iph->ttl=sk->protinfo.af_inet.mc_ttl;
+		/* set TTL for ICMP packets */
+#ifdef	CONFIG_SYSCTL
+		if(iph->protocol == IPPROTO_ICMP)
+			iph->ttl = sysctl_icmp_default_ttl;
+		else {
+#endif
+			if(rt->rt_type != RTN_MULTICAST)
+				iph->ttl = sk->protinfo.af_inet.ttl;
+			else iph->ttl = sk->protinfo.af_inet.mc_ttl;
+#ifdef CONFIG_SYSCTL
+		}
+#endif
 		ip_select_ident(iph, &rt->u.dst, sk);
- -		if (rt->rt_type != RTN_MULTICAST)
- -			iph->ttl=sk->protinfo.af_inet.ttl;
 		iph->protocol=sk->protocol;
 		iph->saddr=rt->rt_src;
 		iph->daddr=rt->rt_dst;
- --- linux/net/ipv4/icmp.c	Mon Feb 25 21:38:14 2002
+++ linux-2.4.18/net/ipv4/icmp.c	Tue Jun 11 15:36:36 2002
@@ -143,6 +143,9 @@
 int sysctl_icmp_echo_ignore_all;
 int sysctl_icmp_echo_ignore_broadcasts;
 
+/* Control max icmp ttl. */
+int sysctl_icmp_default_ttl = 255;
+
 /* Control parameter - ignore bogus broadcast responses? */
 int sysctl_icmp_ignore_bogus_error_responses;
 
П\x02

- -- 
Lev V. Vanyan                    Software Engineer
Mirotel ISP                      nic-hdl: VL1580-RIPE, LV2560-NIC
mailto: remedy@mirotel.net
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^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2002-06-13 17:03 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2002-06-13 16:54 Problems with e1000 driver and ksoftirqd_CPU0 Leech, Christopher
2002-06-13 14:03 ` Renato
  -- strict thread matches above, loose matches on Subject: below --
2002-06-11 13:33 sysctl net.ipv4.icmp_default_ttl Lev V. Vanyan
2002-06-11 10:50 ` Problems with e1000 driver and ksoftirqd_CPU0 Renato

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