Re: SII SATA request size limit

From: Marcelo Penna Guerra (eu_at_marcelopenna.org)
Date: 09/12/03

  • Next message: Marcelo Penna Guerra: "Re: SII SATA request size limit" 
    To: linux-kernel@vger.kernel.org
Date:	Fri, 12 Sep 2003 18:00:24 -0300

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    Alan Cox escreveu:

    > It will depend what disks you have.
    A friend from a forum found out this on NetBSD:

    /*
         * Rev. <= 0x01 of the 3112 have a bug that can cause data
         * corruption if DMA transfers cross an 8K boundary.  This is
         * apparently hard to tickle, but we'll go ahead and play it
         * safe.
         */
        if (PCI_REVISION(pa->pa_class) <= 0x01) {
           sc->sc_dma_maxsegsz = 8192;
           sc->sc_dma_boundary = 8192;
        }

    It seems to be a bug only in the first revisions of the chip. Can anyone
    confirm this? My chip is revision 2 and it doesn't have this bug.

    > You can up it again at runtime.

    How do I set the rqsize on 2.6.x?

    Marcelo Penna Guerra
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