From ac498b1444e99e41c1aea0413aec362a20bf13b1 Mon Sep 17 00:00:00 2001
From: Dayu Liu <liu.dayu@zte.com.cn>
Date: Mon, 18 May 2020 10:51:22 +0800
Subject: [PATCH] doc: using 4096 block size when bdev_aio_create

Created Linux AIO bdev disk with 8192 block size can not work
on some guest OS, i.e. CentOS 7.x, and may stuck when guest OS startup.
So applying block size smaller than or equal to 4096 bytes may be a more
suitable and common choice for most guest OS or cases.

Signed-off-by: Dayu Liu <liu.dayu@zte.com.cn>
Change-Id: I0f2ce4e1fd19f337c3128ad3511823c984f0aac8
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2489
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
---
 doc/bdev.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/bdev.md b/doc/bdev.md
index a98a313cd..9f842943f 100644
--- a/doc/bdev.md
+++ b/doc/bdev.md
@@ -336,9 +336,9 @@ Example commands
 
 This command will create `aio0` device from /dev/sda.
 
-`rpc.py bdev_aio_create /tmp/file file 8192`
+`rpc.py bdev_aio_create /tmp/file file 4096`
 
-This command will create `file` device with block size 8192 from /tmp/file.
+This command will create `file` device with block size 4096 from /tmp/file.
 
 To delete an aio bdev use the bdev_aio_delete command.