Re: [PATCH] mptfusion: enable no_write_same in scsi_host_template

From: Chris J Arges
Date: Mon Sep 22 2014 - 14:50:17 EST

On 09/22/2014 01:19 PM, Christoph Hellwig wrote:
> On Mon, Sep 22, 2014 at 01:17:01PM -0500, Chris J Arges wrote:
>> I've only been able to reproduce this on VMWare. There is a pretty
>> straightforward reproducer in the BugLink if there is any interest in
>> verifying on hardware.
>> How would you recommending blacklisting only VMWare guests in this case?
> Can you check what PCI subdevice and subvendor IDs the device you can
> reproduce it with have? If the subvendor is Vmware that would be easy,
> if not the Avago people might be able to help with a device specific
> VMware identification. If that fails we have kernel helpers to
> identify the hypervisor, but I'd rather avoid that as it would also
> trigger for PCI pass through devices.


Thanks for the input, and now I realize how broad the earlier patch was.
I'll see if I can quirk on the vendor ID to enable no_write_same, in the
meantime I'll see if there are any ways to fix the underlying issue
without adding such a quirk.

--chris j arges
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