Messages in this thread | | | From | KY Srinivasan <> | Subject | RE: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 | Date | Wed, 9 Jul 2014 19:52:54 +0000 |
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> -----Original Message----- > From: Christoph Hellwig [mailto:hch@infradead.org] > Sent: Wednesday, July 9, 2014 1:43 AM > To: KY Srinivasan > Cc: linux-kernel@vger.kernel.org; devel@linuxdriverproject.org; > ohering@suse.com; jbottomley@parallels.com; jasowang@redhat.com; > apw@canonical.com; linux-scsi@vger.kernel.org; stable@vger.kernel.org > Subject: Re: [PATCH 4/8] Drivers: scsi: storvsc: Filter WRITE_SAME_16 > > On Tue, Jul 08, 2014 at 05:46:48PM -0700, K. Y. Srinivasan wrote: > > Host does not handle WRITE_SAME_16; filter this command out. This > > patch is required to handle large devices (greater than 2 TB disks). > > Storvsc already sets the no_write_same flag, where is the command coming > from?
In spite of this flag, I see WRITE_SAME_16 being issued when I format a device bigger than 2 TB; I tried both xfs and ext4. Windows hosts currently do not handle unsupported commands correctly - The information returned is not sufficient to effect recovery in the Linux guest. While this may be addressed in future hosts, this patch fixes the problem.
K. Y
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