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Date:      Thu, 12 Nov 2009 17:18:53 +0200
From:      Mykola Dzham <freebsd@levsha.org.ua>
To:        Jack Vogel <jfvogel@gmail.com>
Cc:        current@freebsd.org
Subject:   Re: page fault in igb driver on 8.0-RC2
Message-ID:  <20091112151852.GC81701@expo.ukrweb.net>
In-Reply-To: <2a41acea0911101120o39fd695cpa325736d00b11587@mail.gmail.com>
References:  <20091017170351.GZ29771@expo.ukrweb.net> <20091017222314.GB19204@michelle.cdnetworks.com> <200911092033.nA9KX6dD013378@lava.sentex.ca> <200911092215.nA9MFeDP013898@lava.sentex.ca> <2a41acea0911091459w2b4fec5djd64d0324557b7da2@mail.gmail.com> <200911100021.nAA0LvMG014534@lava.sentex.ca> <2a41acea0911091633u2899b47ewb514b6276ba2cf62@mail.gmail.com> <200911100227.nAA2RtDY015177@lava.sentex.ca> <2a41acea0911101057q4f913e30m9319e52bbd254cfe@mail.gmail.com> <2a41acea0911101120o39fd695cpa325736d00b11587@mail.gmail.com>

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 Jack Vogel wrote:
> This is a fix for this problem, please apply and test this.
> 
> Jack
> 
> ------- if_igb.c    (revision 197079)
> +++ if_igb.c    (working copy)
> @@ -2654,7 +2654,7 @@
>      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 */
> @@ -2867,7 +2867,7 @@
>       * 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 */
> @@ -3554,7 +3554,7 @@
>      ** 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 */

This patch fix my problem too: 4 hour uptime on patched 8.0-RC2 with
high network load without any problems.
Thanks!

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