Re: page fault in igb driver on 8.0-RC2

From: Mike Tancsa <mike_at_sentex.net>
Date: Tue, 10 Nov 2009 15:18:09 -0500
At 02:20 PM 11/10/2009, Jack Vogel wrote:
>This is a fix for this problem, please apply and test this.

Hi,
         Thanks! Yes, I am able to use both ports of the NIC now and 
no panics yet. Prior to this patch, bringing up both ports resulted 
in a non functioning NIC and panic!  Generating some UDP and tcp 
traffic through the box, all seems to be OK on first blush.

I will try some more extensive tests over the next little while.

igb0: Excessive collisions = 0
igb0: Sequence errors = 0
igb0: Defer count = 0
igb0: Missed Packets = 0
igb0: Receive No Buffers = 40
igb0: Receive Length Errors = 0
igb0: Receive errors = 2
igb0: Crc errors = 4
igb0: Alignment errors = 0
igb0: Collision/Carrier extension errors = 0
igb0: RX overruns = 0
igb0: watchdog timeouts = 0
igb0: XON Rcvd = 0
igb0: XON Xmtd = 0
igb0: XOFF Rcvd = 0
igb0: XOFF Xmtd = 0
igb0: Good Packets Rcvd = 103212774
igb0: Good Packets Xmtd = 9347339
igb0: TSO Contexts Xmtd = 0
igb0: TSO Contexts Failed = 0
igb1: Excessive collisions = 0
igb1: Sequence errors = 0
igb1: Defer count = 0
igb1: Missed Packets = 0
igb1: Receive No Buffers = 0
igb1: Receive Length Errors = 0
igb1: Receive errors = 0
igb1: Crc errors = 0
igb1: Alignment errors = 0
igb1: Collision/Carrier extension errors = 0
igb1: RX overruns = 0
igb1: watchdog timeouts = 0
igb1: XON Rcvd = 0
igb1: XON Xmtd = 0
igb1: XOFF Rcvd = 0
igb1: XOFF Xmtd = 0
igb1: Good Packets Rcvd = 9365642
igb1: Good Packets Xmtd = 17781877
igb1: TSO Contexts Xmtd = 988
igb1: TSO Contexts Failed = 0



# ./netsend 10.255.255.3 600 300 280000 10
Sending packet of payload size 300 every 0.000003571s for 10 seconds

start:             1257884127.000000000
finish:            1257884137.000003339
send calls:        2800336
send errors:       1970
approx send rate:  279836
approx error rate: 0
waited:            1259257
approx waits/sec:  125925
approx wait rate:  0
# traceroute 10.255.255.3
traceroute to 10.255.255.3 (10.255.255.3), 64 hops max, 40 byte packets
  1  1.1.1.1 (1.1.1.1)  0.096 ms  0.073 ms  0.115 ms
  2  10.255.255.3 (10.255.255.3)  67.953 ms  0.297 ms  0.241 ms

The box with the igb nics has the interfaces 1.1.1.1 and 10.255.255.1

         ---Mike


>Jack
>
>------- if_igb.c    (revision 197079)
>+++ if_igb.c    (working copy)
>_at__at_ -2654,7 +2654,7 _at__at_
>      int error;
>
>      error = bus_dma_tag_create(bus_get_dma_tag(adapter->dev), /* parent */
>-                IGB_DBA_ALIGN, 0,    /* alignment, bounds */
>+                1, 0,            /* alignment, bounds */
>                  BUS_SPACE_MAXADDR,    /* lowaddr */
>                  BUS_SPACE_MAXADDR,    /* highaddr */
>                  NULL, NULL,        /* filter, filterarg */
>_at__at_ -2867,7 +2867,7 _at__at_
>       * Setup DMA descriptor areas.
>       */
>      if ((error = bus_dma_tag_create(NULL,        /* parent */
>-                   PAGE_SIZE, 0,        /* alignment, bounds */
>+                   1, 0,            /* alignment, bounds */
>                     BUS_SPACE_MAXADDR,    /* lowaddr */
>                     BUS_SPACE_MAXADDR,    /* highaddr */
>                     NULL, NULL,        /* filter, filterarg */
>_at__at_ -3554,7 +3554,7 _at__at_
>      ** it may not always use this.
>      */
>      if ((error = bus_dma_tag_create(NULL,        /* parent */
>-                   PAGE_SIZE, 0,    /* alignment, bounds */
>+                   1, 0,        /* alignment, bounds */
>                     BUS_SPACE_MAXADDR,    /* lowaddr */
>                     BUS_SPACE_MAXADDR,    /* highaddr */
>                     NULL, NULL,        /* filter, filterarg */
>
>
>
>On Tue, Nov 10, 2009 at 10:57 AM, Jack Vogel 
><<mailto:jfvogel_at_gmail.com>jfvogel_at_gmail.com> wrote:
>I have repro'd this failure this morning and think I have a fix for 
>it, I am testing that soon.
>
>Stay tuned,
>
>Jack
>
>
>
>On Mon, Nov 9, 2009 at 6:28 PM, Mike Tancsa 
><<mailto:mike_at_sentex.net>mike_at_sentex.net> wrote:
>At 07:33 PM 11/9/2009, Jack Vogel wrote:
>Some reason you aren't using amd64? I will have a system installed that way
>and see if I can repro it then, thanks.
>
>
>
>I had found in the past i386 was faster for firewall and routing 
>applications.   Perhaps thats different now, I will give it a try 
>again to see if there is any difference.
>
>pciconf and dmesg attached.
>
>        ---Mike
>
>
>
>Jack
>
>
>
>On Mon, Nov 9, 2009 at 4:22 PM, Mike Tancsa 
><<mailto:mike_at_sentex.net>mike_at_sentex.net> wrote:
>At 05:59 PM 11/9/2009, Jack Vogel wrote:
>Are you using standard MTU or jumbo? That get_buf error is ENOMEM, looks like
>that happens when in the bus_dma stuff reserve_bounce_pages() fails.
>
>Are you maybe using a 32 bit kernel? I have not seen this failure here.
>
>
>Hi Jack,
>       Standard MTU and i386
>
>       ---Mike
>
>
>
>--------------------------------------------------------------------
>Mike Tancsa,                                      tel +1 519 651 3400
>Sentex Communications, <mailto:mike_at_sentex.net>mike_at_sentex.net
>Providing Internet since 
>1994 
><<http://www.sentex.net>http://www.sentex.net>www.sentex.net
>Cambridge, Ontario 
>Canada 
><<http://www.sentex.net/mike>http://www.sentex.net/mike>www.sentex.net/mike
>
>
>--------------------------------------------------------------------
>Mike Tancsa,                                      tel +1 519 651 3400
>Sentex 
>Communications, 
><mailto:mike_at_sentex.net>mike_at_sentex.net
>Providing Internet since 
>1994                    <http://www.sentex.net>www.sentex.net
>Cambridge, Ontario 
>Canada                         <http://www.sentex.net/mike>www.sentex.net/mike
>
>

--------------------------------------------------------------------
Mike Tancsa,                                      tel +1 519 651 3400
Sentex Communications,                            mike_at_sentex.net
Providing Internet since 1994                    www.sentex.net
Cambridge, Ontario Canada                         www.sentex.net/mike
Received on Tue Nov 10 2009 - 19:18:05 UTC

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