Messages in this thread Patch in this message | | | Date | Sat, 23 Jun 2007 05:54:51 +0200 | From | Carlo Wood <> | Subject | Re: SATA RAID5 speed drop of 100 MB/s |
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For what it's worth... I tried applying
--- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -516,6 +516,8 @@ static void ahci_save_initial_config(struct pci_dev *pdev, * reset. Values without are used for driver operation. */ hpriv->saved_cap = cap = readl(mmio + HOST_CAP); + hpriv->saved_cap &= ( (1<<28) | (1<<17) ); + hpriv->saved_cap |= (1 << 27); hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
/* some chips lie about 64bit support */ to 2.6.22-rc5, but it had no effect :*)
I'll await any comments from a kernel developer for now. Please let me know if you want me to test something.
-- Carlo Wood <carlo@alinoe.com> - 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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