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[JFFS2] Finally eliminate __totlen field from struct jffs2_raw_node_ref

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Well, almost. We'll actually keep a 'TEST_TOTLEN' macro set for now, and keep
doing some paranoia checks to make sure it's all working correctly. But if
TEST_TOTLEN is unset, the size of struct jffs2_raw_node_ref drops from 16
bytes to 12 on 32-bit machines. That's a saving of about half a megabyte of
memory on the OLPC prototype board, with 125K or so nodes in its 512MiB of
flash.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse
2006-05-21 13:29:11 +01:00
parent 010b06d6d0
commit ca89a517fa
3 changed files with 121 additions and 58 deletions
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6
fs/jffs2/nodemgmt.c
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@@ -386,7 +386,9 @@ int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_r
struct jffs2_eraseblock *jeb;
jeb = &c->blocks[new->flash_offset / c->sector_size];
#ifdef TEST_TOTLEN
new->__totlen = len;
#endif
D1(printk(KERN_DEBUG "jffs2_add_physical_node_ref(): Node at 0x%x(%d), size 0x%x\n", ref_offset(new), ref_flags(new), len));
#if 1
@@ -679,7 +681,9 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
spin_lock(&c->erase_completion_lock);
#ifdef TEST_TOTLEN
ref->__totlen += n->__totlen;
#endif
ref->next_phys = n->next_phys;
if (jeb->last_node == n) jeb->last_node = ref;
if (jeb->gc_node == n) {
@@ -702,7 +706,9 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
p = p->next_phys;
if (ref_obsolete(p) && !ref->next_in_ino) {
#ifdef TEST_TOTLEN
p->__totlen += ref->__totlen;
#endif
if (jeb->last_node == ref) {
jeb->last_node = p;
}