Messages in this thread | | | Subject | Re: [PATCH 1/8] scsi: add a host / host template field for the virt boundary | From | Bart Van Assche <> | Date | Mon, 17 Jun 2019 13:51:02 -0700 |
| |
On 6/17/19 5:19 AM, Christoph Hellwig wrote: > diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c > index 65d0a10c76ad..d333bb6b1c59 100644 > --- a/drivers/scsi/scsi_lib.c > +++ b/drivers/scsi/scsi_lib.c > @@ -1775,7 +1775,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) > dma_set_seg_boundary(dev, shost->dma_boundary); > > blk_queue_max_segment_size(q, shost->max_segment_size); > - dma_set_max_seg_size(dev, shost->max_segment_size); > + blk_queue_virt_boundary(q, shost->virt_boundary_mask); > + dma_set_max_seg_size(dev, queue_max_segment_size(q));
Although this looks fine to me for LLDs that own a PCIe device, I doubt this is correct for SCSI LLDs that share a PCIe device with other ULP drivers. From the RDMA core:
/* Setup default max segment size for all IB devices */ dma_set_max_seg_size(device->dma_device, SZ_2G);
Will instantiating a SCSI host (iSER or SRP) for an RDMA adapter cause the maximum segment size to be modified for all ULP drivers associated with that HCA?
Thanks,
Bart.
| |