From 092de1460ab82f2a7eba276d43514bbaa4c410b2 Mon Sep 17 00:00:00 2001
From: Piotr Pelplinski <piotr.pelplinski@intel.com>
Date: Wed, 24 Oct 2018 15:12:30 +0200
Subject: [PATCH] bdev: set optimal io boundary to size of large buf pool

This is requirement for following patch. Requests that will
reuquest bounce buffer can only allocate limited size buffer.

Signed-off-by: Piotr Pelplinski <piotr.pelplinski@intel.com>
Change-Id: I850b614305d66065733381ceb7bd67d4b1cad6b3

Reviewed-on: https://review.gerrithub.io/430783
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Maciej Szwed <maciej.szwed@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 lib/bdev/bdev.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/bdev/bdev.c b/lib/bdev/bdev.c
index 5da6bb648..a92c1549e 100644
--- a/lib/bdev/bdev.c
+++ b/lib/bdev/bdev.c
@@ -3258,6 +3258,16 @@ spdk_bdev_init(struct spdk_bdev *bdev)
 	bdev->internal.qd_poller = NULL;
 	bdev->internal.qos = NULL;
 
+	if (spdk_bdev_get_buf_align(bdev) > 1) {
+		if (bdev->split_on_optimal_io_boundary) {
+			bdev->optimal_io_boundary = spdk_min(bdev->optimal_io_boundary,
+							     SPDK_BDEV_LARGE_BUF_MAX_SIZE / bdev->blocklen);
+		} else {
+			bdev->split_on_optimal_io_boundary = true;
+			bdev->optimal_io_boundary = SPDK_BDEV_LARGE_BUF_MAX_SIZE / bdev->blocklen;
+		}
+	}
+
 	TAILQ_INIT(&bdev->internal.open_descs);
 
 	TAILQ_INIT(&bdev->aliases);