Commit 864d39df authored Aug 08, 2018 by Greg Edwards Committed by Michael S. Tsirkin Aug 22, 2018

vhost/scsi: increase VHOST_SCSI_PREALLOC_PROT_SGLS to 2048



The current value of VHOST_SCSI_PREALLOC_PROT_SGLS is too small to
accommodate larger I/Os, e.g. 16-32 MiB, when the VIRTIO_SCSI_F_T10_PI
feature bit is negotiated and the backing store supports T10 PI.

vhost-scsi rejects the command with errors like:

[   59.581317] vhost_scsi_calc_sgls: requested sgl_count: 1820 exceeds pre-allocated max_sgls: 512

Signed-off-by: Greg Edwards <gedwards@ddn.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

parent 84f3396b

drivers/vhost/scsi.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -56,7 +56,7 @@
	#define VHOST_SCSI_DEFAULT_TAGS 256		#define VHOST_SCSI_DEFAULT_TAGS 256
	#define VHOST_SCSI_PREALLOC_SGLS 2048		#define VHOST_SCSI_PREALLOC_SGLS 2048
	#define VHOST_SCSI_PREALLOC_UPAGES 2048		#define VHOST_SCSI_PREALLOC_UPAGES 2048
	#define VHOST_SCSI_PREALLOC_PROT_SGLS 512		#define VHOST_SCSI_PREALLOC_PROT_SGLS 2048

	struct vhost_scsi_inflight {		struct vhost_scsi_inflight {
	/* Wait for the flush operation to finish */		/* Wait for the flush operation to finish */