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On Wed, Oct 15 2003, David S. Miller wrote: > On Wed, 15 Oct 2003 15:37:22 +0300 > <mika.penttila@kolumbus.fi> wrote: > > > >It does matter if the driver can't cope with it. > > > > But this fix may hurt performance with well behaving drivers in > > iommu systems. It's better to fix the broken drivers I think. > > That's absolutely correct. > > If you add Herbert's change, you will effectively turn off all > of the IOMMU coalescing benefits we designed into the block layer. > Please don't apply it, fix the broken drivers instead. Just changing it to hw segments should be fine, but I agree phys segments is the wrong check. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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