Commit 6fdc0a53 authored Dec 13, 2020 by Shuhei Matsumoto Committed by Tomasz Zawadzki Dec 15, 2020

bdev/ocssd: Call read() directly when buffer is already allocated



Call bdev_ocssd_read() directly when buffer is already allocated
to improve performance and support retry in the bdev module as done
for the standard NVMe bdev.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: Icf18148e09b61df7effc84535bea60f49d1c15b3
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5559


Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>

parent c885010f

module/bdev/nvme/bdev_ocssd.c

+14 −3

Original line number	Diff line number	Diff line
		@@ -810,9 +810,20 @@ _bdev_ocssd_submit_request(struct spdk_io_channel ch, struct spdk_bdev_io bdev

		switch (bdev_io->type) {
		case SPDK_BDEV_IO_TYPE_READ:
		if (bdev_io->u.bdev.iovs && bdev_io->u.bdev.iovs[0].iov_base) {
		return bdev_ocssd_read(ocssd_bdev,
		nvme_ch,
		ocdev_io,
		bdev_io->u.bdev.iovs,
		bdev_io->u.bdev.iovcnt,
		bdev_io->u.bdev.md_buf,
		bdev_io->u.bdev.num_blocks,
		bdev_io->u.bdev.offset_blocks);
		} else {
		spdk_bdev_io_get_buf(bdev_io, bdev_ocssd_io_get_buf_cb,
		bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
		return 0;
		}

		case SPDK_BDEV_IO_TYPE_WRITE:
		return bdev_ocssd_write(ocssd_bdev,

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