Messages in this thread |  | | From | Long Li <> | Subject | RE: [PATCH v2] storvsc: Set up correct queue depth values for IDE devices | Date | Wed, 18 Apr 2018 23:18:21 +0000 |
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Hi Martin
Can you take a look at the following patch?
Long
> > -----Original Message----- > > From: linux-kernel-owner@vger.kernel.org > > <linux-kernel-owner@vger.kernel.org> On Behalf Of Long Li > > Sent: Thursday, March 22, 2018 2:47 PM > > To: KY Srinivasan <kys@microsoft.com>; Haiyang Zhang > > <haiyangz@microsoft.com>; Stephen Hemminger > <sthemmin@microsoft.com>; > > James E . J . Bottomley <JBottomley@odin.com>; Martin K . Petersen > > <martin.petersen@oracle.com>; devel@linuxdriverproject.org; linux- > > scsi@vger.kernel.org; linux-kernel@vger.kernel.org > > Cc: Long Li <longli@microsoft.com> > > Subject: [PATCH v2] storvsc: Set up correct queue depth values for IDE > > devices > > > > From: Long Li <longli@microsoft.com> > > > > Unlike SCSI and FC, we don't use multiple channels for IDE. > > Also fix the calculation for sub-channels. > > > > Change log: > > v2: Addressed comment on incorrect number of sub-channels. > > (Michael Kelley <Michael.H.Kelley@microsoft.com>) > > > > Signed-off-by: Long Li <longli@microsoft.com> > > Reviewed-by: Michael Kelley <mikelley@microsoft.com> > > > --- > > drivers/scsi/storvsc_drv.c | 7 +++++-- > > 1 file changed, 5 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c > > index 8c51d628b52e..a2ec0bc9e9fa 100644 > > --- a/drivers/scsi/storvsc_drv.c > > +++ b/drivers/scsi/storvsc_drv.c > > @@ -1722,11 +1722,14 @@ static int storvsc_probe(struct hv_device > *device, > > max_targets = STORVSC_MAX_TARGETS; > > max_channels = STORVSC_MAX_CHANNELS; > > /* > > - * On Windows8 and above, we support sub-channels for > storage. > > + * On Windows8 and above, we support sub-channels for > storage > > + * on SCSI and FC controllers. > > * The number of sub-channels offerred is based on the > number of > > * VCPUs in the guest. > > */ > > - max_sub_channels = (num_cpus / > storvsc_vcpus_per_sub_channel); > > + if (!dev_is_ide) > > + max_sub_channels = > > + (num_cpus - 1) / > storvsc_vcpus_per_sub_channel; > > } > > > > scsi_driver.can_queue = (max_outstanding_req_per_channel * > > -- > > 2.14.1
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