xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

no need for list_for_each_entry_safe()/resetting with superblock list

Browse Source 
just delay __put_super() a bit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2010-07-25 02:31:46 +04:00
parent 7a4dec5389
commit dca332528b
2 changed files with 28 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
fs/dcache.c
View File

@@ -536,7 +536,7 @@ restart:
*/
static void prune_dcache(int count)
{
struct super_block *sb, *n;
struct super_block *sb, *p = NULL;
int w_count;
int unused = dentry_stat.nr_unused;
int prune_ratio;
@@ -550,7 +550,7 @@ static void prune_dcache(int count)
else
prune_ratio = unused / count;
spin_lock(&sb_lock);
list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
list_for_each_entry(sb, &super_blocks, s_list) {
if (list_empty(&sb->s_instances))
continue;
if (sb->s_nr_dentry_unused == 0)
@@ -590,14 +590,16 @@ static void prune_dcache(int count)
up_read(&sb->s_umount);
}
spin_lock(&sb_lock);
/* lock was dropped, must reset next */
list_safe_reset_next(sb, n, s_list);
if (p)
__put_super(p);
count -= pruned;
__put_super(sb);
p = sb;
/* more work left to do? */
if (count <= 0)
break;
}
if (p)
__put_super(p);
spin_unlock(&sb_lock);
spin_unlock(&dcache_lock);
}