On Thu, 2014-07-24 at 08:56 +0100, Sitsofe Wheeler wrote: > Microsoft Hyper-V targets currently only claim SPC-2 compliance / no > compliance indicated even though they implement post SPC-2 features > which means those features are not tested for. Add a blacklist flag to > Hyper-V devices that forces said testing. This description is misleading: you don't force the test now, you force the driver to send unmap commands down to the device. > See https://lkml.org/lkml/2014/7/21/627 for the previous version of this > patch and https://lkml.org/lkml/2014/7/23/615 for example devices. > > Original-patch-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > Signed-off-by: Sitsofe Wheeler <sitsofe@xxxxxxxxx> > --- > drivers/scsi/storvsc_drv.c | 10 +++------- > 1 file changed, 3 insertions(+), 7 deletions(-) > > diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c > index 5ad2810..88b7173 100644 > --- a/drivers/scsi/storvsc_drv.c > +++ b/drivers/scsi/storvsc_drv.c > @@ -326,8 +326,6 @@ MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)"); > */ > static int storvsc_timeout = 180; > > -static int msft_blist_flags = BLIST_TRY_VPD_PAGES; > - > #define STORVSC_MAX_IO_REQUESTS 200 > > static void storvsc_on_channel_callback(void *context); > @@ -1444,12 +1442,10 @@ static int storvsc_device_configure(struct scsi_device *sdevice) > sdevice->no_write_same = 1; > > /* > - * Add blist flags to permit the reading of the VPD pages even when > - * the target may claim SPC-2 compliance. MSFT targets currently > - * claim SPC-2 compliance while they implement post SPC-2 features. > - * With this patch we can correctly handle WRITE_SAME_16 issues. > + * Forcefully enable logical block provisioning testing. > */ > - sdevice->sdev_bflags |= msft_blist_flags; > + sdevice->sdev_bflags |= BLIST_TRY_LBP; > + sdevice->try_lbp = 1; Really no way to this one. You're forcing unmap support on every hyper-v device; including spinning rust pass through ones which won't support it. The hyper-v storage interface has proven to be somewhat fragile, so it may explode when the device tries to send illegal command sense back. If you have a specific IDENTITY string for a faulty SSD that fails to report unmap support correctly, then we could quirk for that, but not everything attached to the hyper-v driver. James ��.n��������+%������w��{.n�����{������ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
