D35328.id106398.diff
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D35328.id106398.diff
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	Index: usr.sbin/bhyve/pci_nvme.c
	===================================================================
	--- usr.sbin/bhyve/pci_nvme.c
	+++ usr.sbin/bhyve/pci_nvme.c
	@@ -2171,6 +2171,7 @@
	uint64_t gpaddr, size_t size, int do_write, uint64_t lba)
	{
	int iovidx;
	+ bool range_is_contiguous;

	if (req == NULL)
	return (-1);
	@@ -2179,8 +2180,16 @@
	return (-1);
	}

	- /* concatenate contig block-iovs to minimize number of iovs */
	- if ((req->prev_gpaddr + req->prev_size) == gpaddr) {
	+ /*
	+ * Minimize the number of IOVs by concatenating contiguous address
	+ * ranges. Skip if there is no previous range.
	+ */
	+ if (req->io_req.br_iovcnt == 0)
	+ range_is_contiguous = false;
	+ else
	+ range_is_contiguous = (req->prev_gpaddr + req->prev_size) == gpaddr;
	+
	+ if (range_is_contiguous) {
	iovidx = req->io_req.br_iovcnt - 1;

	req->io_req.br_iov[iovidx].iov_base =