Re: [PATCH 0/4] Hyper-V TRIM support

2013-09-13 Thread Douglas Gilbert
On 13-09-13 08:58 AM, Andy Whitcroft wrote: tl;dr -- enable TRIM support for Hyper-V emulated disks. The Hyper-V hypervisor can support TRIM for its devices, advertising this via the appropriate VPD pages. However the emulated disks only claim to be SPC-2 devices. According to the specs VPD pa

Re: [PATCH 0/4] Hyper-V TRIM support

2013-09-13 Thread Andy Whitcroft
On Fri, Sep 13, 2013 at 07:57:58AM -0700, James Bottomley wrote: > This is an awful lot of contortions (which don't seem to have any other > users on the horizon) to support a device that's not standards > compliant. What about this, it's simple, it does the right thing and > it's contained in th

Re: [PATCH 0/4] Hyper-V TRIM support

2013-09-13 Thread James Bottomley
On Fri, 2013-09-13 at 13:58 +0100, Andy Whitcroft wrote: > tl;dr -- enable TRIM support for Hyper-V emulated disks. > > The Hyper-V hypervisor can support TRIM for its devices, advertising this > via the appropriate VPD pages. However the emulated disks only claim > to be SPC-2 devices. Accordin

[PATCH 0/4] Hyper-V TRIM support

2013-09-13 Thread Andy Whitcroft
tl;dr -- enable TRIM support for Hyper-V emulated disks. The Hyper-V hypervisor can support TRIM for its devices, advertising this via the appropriate VPD pages. However the emulated disks only claim to be SPC-2 devices. According to the specs VPD pages (in general) did exist at SPC-2 but the sp