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Date:	Mon, 15 Sep 2014 22:23:42 +0100
From:	Sitsofe Wheeler <>
To:	Greg Kroah-Hartman <>
	KY Srinivasan <>,
	"Martin K. Petersen" <>,
	Christoph Hellwig <>,
	James Bottomley <>
Subject: Re: [PATCH 3.14 039/114] scsi: add a blacklist flag which enables
 VPD page inquiries

On Mon, Sep 15, 2014 at 12:25:39PM -0700, Greg Kroah-Hartman wrote:
> 3.14-stable review patch.  If anyone has any objections, please let me know.
> ------------------
> From: "Martin K. Petersen" <>
> commit c1d40a527e885a40bb9ea6c46a1b1145d42b66a0 upstream.
> Despite supporting modern SCSI features some storage devices continue to
> claim conformance to an older version of the SPC spec. This is done for
> compatibility with legacy operating systems.
> Linux by default will not attempt to read VPD pages on devices that
> claim SPC-2 or older. Introduce a blacklist flag that can be used to
> trigger VPD page inquiries on devices that are known to support them.
> Reported-by: KY Srinivasan <>
> Tested-by: KY Srinivasan <>
> Reviewed-by: KY Srinivasan <>
> Signed-off-by: Martin K. Petersen <>
> Signed-off-by: Christoph Hellwig <>
> Signed-off-by: Greg Kroah-Hartman <>
> ---


> +#define BLIST_TRY_VPD_PAGES	0x10000000 /* Attempt to read VPD pages */
>  #endif

Where is BLIST_TRY_VPD_PAGES being quirked on for Hyper-V's devices - is
there some later patch or some missing code I'm overlooking?

If the missing piece is f3cfabce7a2e92564d380de3aad4b43901fb7ae6, are
people sure it works? I'll retest but the last two times I tested it
( and ) no one said anything after I said
thin provisioning wasn't enabled and James doesn't like quirking this on
every Hyper-V device ( )...

Sitsofe |
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