From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 1 Oct 2010 14:47:38 +0000 (-0400)
Subject: mke2fs: Enable lazy_itable_init if the kernel supports this feature
X-Git-Tag: v1.41.13~20
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=210fd2c7072f2f150e2bb10b07c49472bb78e366;p=thirdparty%2Fe2fsprogs.git

mke2fs: Enable lazy_itable_init if the kernel supports this feature

Add check for /sys/fs/ext4/features/lazy_itable_init.  If this file
exists, it should be OK to skip initializing the inode table since the
kernel will do it at mount time.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 08fab41bf..3c10a7a7a 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -1723,8 +1723,13 @@ got_size:
 
 	blocksize = EXT2_BLOCK_SIZE(&fs_param);
 
+	lazy_itable_init = 0;
+	if (access("/sys/fs/ext4/features/lazy_itable_init", R_OK) == 0)
+		lazy_itable_init = 1;
+
 	lazy_itable_init = get_bool_from_profile(fs_types,
-						 "lazy_itable_init", 0);
+						 "lazy_itable_init",
+						 lazy_itable_init);
 
 	/* Get options from profile */
 	for (cpp = fs_types; *cpp; cpp++) {