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authorFerenc Havasi <havasi@inf.u-szeged.hu>2005-09-07 09:35:26 +0100
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-11-06 21:29:48 +0100
commite631ddba588783edd521c5a89f7b2902772fb691 (patch)
treee25f322ee498b344f058ce4a40060baa22a5f105 /fs/jffs2/build.c
parent15017876751e4c2d786ba95920618359fe2b4f0a (diff)
downloadlinux-linaro-e631ddba588783edd521c5a89f7b2902772fb691.tar.gz
[JFFS2] Add erase block summary support (mount time improvement)
The goal of summary is to speed up the mount time. Erase block summary (EBS) stores summary information at the end of every (closed) erase block. It is no longer necessary to scan all nodes separetly (and read all pages of them) just read this "small" summary, where every information is stored which is needed at mount time. This summary information is stored in a JFFS2_FEATURE_RWCOMPAT_DELETE. During the mount process if there is no summary info the orignal scan process will be executed. EBS works with NAND and NOR flashes, too. There is a user space tool called sumtool to generate this summary information for a JFFS2 image. Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs/jffs2/build.c')
-rw-r--r--fs/jffs2/build.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c
index 1522eace932..f4a47a3b2a0 100644
--- a/fs/jffs2/build.c
+++ b/fs/jffs2/build.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: build.c,v 1.77 2005/08/31 13:51:00 havasi Exp $
+ * $Id: build.c,v 1.78 2005/09/07 08:34:54 havasi Exp $
*
*/
@@ -350,6 +350,10 @@ int jffs2_do_mount_fs(struct jffs2_sb_info *c)
INIT_LIST_HEAD(&c->bad_list);
INIT_LIST_HEAD(&c->bad_used_list);
c->highest_ino = 1;
+ c->summary = NULL;
+
+ if (jffs2_sum_init(c))
+ return -ENOMEM;
if (jffs2_build_filesystem(c)) {
D1(printk(KERN_DEBUG "build_fs failed\n"));
@@ -357,11 +361,11 @@ int jffs2_do_mount_fs(struct jffs2_sb_info *c)
jffs2_free_raw_node_refs(c);
#ifndef __ECOS
if (jffs2_blocks_use_vmalloc(c))
- vfree(c->blocks);
+ vfree(c->blocks);
else
#endif
- kfree(c->blocks);
-
+ kfree(c->blocks);
+
return -EIO;
}