On 07/28/2015 10:13 AM, Steve Wise wrote: > Currently the sg tablesize, which dictates fast register page list > depth to use, does not take into account the limits of the rdma device. > So adjust it once we discover the device fastreg max depth limit. Also > adjust the max_sectors based on the resulting sg tablesize. > > Signed-off-by: Steve Wise <[email protected]> > --- > Note: This patch was originally part of > http://www.spinics.net/lists/linux-rdma/msg27436.html. The isert work > will be a separate series, so I'm submitting this one to go ahead and > get it merged. > --- > > > drivers/infiniband/ulp/iser/iscsi_iser.c | 9 +++++++++ > 1 files changed, 9 insertions(+), 0 deletions(-) > > diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c > b/drivers/infiniband/ulp/iser/iscsi_iser.c > index 6a594aa..de8730d 100644 > --- a/drivers/infiniband/ulp/iser/iscsi_iser.c > +++ b/drivers/infiniband/ulp/iser/iscsi_iser.c > @@ -640,6 +640,15 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep, > SHOST_DIX_GUARD_CRC); > } > > + /* > + * Limit the sg_tablesize and max_sectors based on the device > + * max fastreg page list length. > + */ > + shost->sg_tablesize = min_t(unsigned short, shost->sg_tablesize, > + ib_conn->device->dev_attr.max_fast_reg_page_list_len); > + shost->max_sectors = min_t(unsigned int, > + 1024, (shost->sg_tablesize * PAGE_SIZE) >> 9); > + > if (iscsi_host_add(shost, > ib_conn->device->ib_device->dma_device)) { > mutex_unlock(&iser_conn->state_mutex); > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html >
Thanks Steve, I'm picking this one up today. -- Doug Ledford <[email protected]> GPG KeyID: 0E572FDD
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