From: Andreas Dilger <adilger@whamcloud.com>
Date: Wed, 30 Mar 2022 04:04:45 +0000 (-0600)
Subject: LU-15692 lmv: change default hash back to fnv_1a_64
X-Git-Tag: 2.15.0-RC3~6
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=0090b6f6f6cfd65fcacfa4dda23bee2cec11cb70;p=fs%2Flustre-release.git

LU-15692 lmv: change default hash back to fnv_1a_64

Until performance issue is resolved, change the default directory
hash type from 'crush' back to 'fnv_1a_64'.

Fixes: bb60caa1c6e7 ("LU-14459 lmv: change default hash type to crush")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: If2cef70298773f42dc1c62809eea98519b3ebbe5
Reviewed-on: https://review.whamcloud.com/46950
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Shuichi Ihara <sihara@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---

diff --git a/lustre/include/uapi/linux/lustre/lustre_user.h b/lustre/include/uapi/linux/lustre/lustre_user.h
index ba5e276..98507e0 100644
--- a/lustre/include/uapi/linux/lustre/lustre_user.h
+++ b/lustre/include/uapi/linux/lustre/lustre_user.h
@@ -1010,7 +1010,7 @@ static __attribute__((unused)) const char *mdt_hash_name[] = {
 	"crush",
 };
 
-#define LMV_HASH_TYPE_DEFAULT LMV_HASH_TYPE_CRUSH
+#define LMV_HASH_TYPE_DEFAULT LMV_HASH_TYPE_FNV_1A_64
 
 /* Right now only the lower part(0-16bits) of lmv_hash_type is being used,
  * and the higher part will be the flag to indicate the status of object,