D35328.id106425.diff
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D35328.id106425.diff
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	Index: usr.sbin/bhyve/pci_nvme.c
	===================================================================
	--- usr.sbin/bhyve/pci_nvme.c
	+++ usr.sbin/bhyve/pci_nvme.c
	@@ -2168,9 +2168,10 @@

	static int
	pci_nvme_append_iov_req(struct pci_nvme_softc sc, struct pci_nvme_ioreq req,
	- uint64_t gpaddr, size_t size, int do_write, uint64_t lba)
	+ uint64_t gpaddr, size_t size, int do_write, uint64_t offset)
	{
	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 =
	@@ -2194,7 +2203,7 @@
	} else {
	iovidx = req->io_req.br_iovcnt;
	if (iovidx == 0) {
	- req->io_req.br_offset = lba;
	+ req->io_req.br_offset = offset;
	req->io_req.br_resid = 0;
	req->io_req.br_param = req;
	}