From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asim Shankar Subject: Re: netif_rx_schedule_prep() returning false? Date: Wed, 2 Feb 2005 14:41:59 -0600 Message-ID: <7bca1cb5050202124149bd7f04@mail.gmail.com> References: <7bca1cb5050202100475279073@mail.gmail.com> <1107371791.3366.126.camel@sfeldma-mobl.dsl-verizon.net> Reply-To: Asim Shankar Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com To: sfeldma@pobox.com In-Reply-To: <1107371791.3366.126.camel@sfeldma-mobl.dsl-verizon.net> Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org > I'm running the same setup with delays turned off and I'm not seeing > what you're seeing. What e1000 controller are you using? Send lspci > -n. lspci -n: 00:00.0 Class 0600: 8086:7190 (rev 03) 00:01.0 Class 0604: 8086:7191 (rev 03) 00:07.0 Class 0601: 8086:7110 (rev 02) 00:07.1 Class 0101: 8086:7111 (rev 01) 00:07.2 Class 0c03: 8086:7112 (rev 01) 00:07.3 Class 0680: 8086:7113 (rev 02) 00:10.0 Class 0200: 8086:1076 00:11.0 Class 0200: 10b7:9055 00:13.0 Class 0604: 1011:0024 (rev 03) 01:00.0 Class 0300: 10de:0028 (rev 11) This happens when a more "powerful" machine sends to a less powerful one and not the reverse. My setup is so: Machine A: Dual Xeon 2.8Ghz, 1GB RAM Dell PowerEdge 1800 Machine B: Dual P-III 500Mhz, 512MB RAM, old Dell Precision 410 I'm using netperf, so B is running a "netserver" and the netperf client application is started on A. "lspci" shown above is from "B". When reversed, B sending TO A, then machine A doesn't complain at all. Machine A also has the same card: Intel PRO/1000 MT Desktop Adapter - Class 0200: 8086:1076. Thanks, Regards, -- Asim P.S. Changes to e1000_intr() in order to check this: o Added "int rx_sched = test_bit(__LINK_STATE_RX_SCHED, &netdev->state); o Later, added an "else" to the "if (likely(netif_rx_schedule_prep(nedev))" block where I do a printk()