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authorDaniel Drake <dsd@laptop.org>2010-10-07 19:14:02 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-10-25 00:57:19 +0100
commit65e5a0e18e5fb5bc6cfabd8ef4b9fc1c8569ba62 (patch)
tree0790ae9e682c5de24b0ffd7111a0bfab4f03aab3 /fs/jffs2/nodelist.h
parentb46daf7eb1a143169699a8f9df634aa751a6ddde (diff)
downloadop-kernel-dev-65e5a0e18e5fb5bc6cfabd8ef4b9fc1c8569ba62.zip
op-kernel-dev-65e5a0e18e5fb5bc6cfabd8ef4b9fc1c8569ba62.tar.gz
jffs2: Dynamically choose inocache hash size
When JFFS2 is used for large volumes, the mount times are quite long. Increasing the hash size provides a significant speed boost on the OLPC XO-1 laptop. Add logic that dynamically selects a hash size based on the size of the medium. A 64mb medium will result in a hash size of 128, and a 512mb medium will result in a hash size of 1024. Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'fs/jffs2/nodelist.h')
-rw-r--r--fs/jffs2/nodelist.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 523a916..5a53d9b 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -199,7 +199,8 @@ struct jffs2_inode_cache {
#define RAWNODE_CLASS_XATTR_DATUM 1
#define RAWNODE_CLASS_XATTR_REF 2
-#define INOCACHE_HASHSIZE 128
+#define INOCACHE_HASHSIZE_MIN 128
+#define INOCACHE_HASHSIZE_MAX 1024
#define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
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