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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.c
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.c')
-rw-r--r--fs/jffs2/nodelist.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index af02bd1..5e03233 100644
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -420,7 +420,7 @@ struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t
{
struct jffs2_inode_cache *ret;
- ret = c->inocache_list[ino % INOCACHE_HASHSIZE];
+ ret = c->inocache_list[ino % c->inocache_hashsize];
while (ret && ret->ino < ino) {
ret = ret->next;
}
@@ -441,7 +441,7 @@ void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new
dbg_inocache("add %p (ino #%u)\n", new, new->ino);
- prev = &c->inocache_list[new->ino % INOCACHE_HASHSIZE];
+ prev = &c->inocache_list[new->ino % c->inocache_hashsize];
while ((*prev) && (*prev)->ino < new->ino) {
prev = &(*prev)->next;
@@ -462,7 +462,7 @@ void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old)
dbg_inocache("del %p (ino #%u)\n", old, old->ino);
spin_lock(&c->inocache_lock);
- prev = &c->inocache_list[old->ino % INOCACHE_HASHSIZE];
+ prev = &c->inocache_list[old->ino % c->inocache_hashsize];
while ((*prev) && (*prev)->ino < old->ino) {
prev = &(*prev)->next;
@@ -487,7 +487,7 @@ void jffs2_free_ino_caches(struct jffs2_sb_info *c)
int i;
struct jffs2_inode_cache *this, *next;
- for (i=0; i<INOCACHE_HASHSIZE; i++) {
+ for (i=0; i < c->inocache_hashsize; i++) {
this = c->inocache_list[i];
while (this) {
next = this->next;
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