GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 23:32:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

inode: convert inode_sb_list_lock to per-sb

Browse source 
The process of reducing contention on per-superblock inode lists
starts with moving the locking to match the per-superblock inode
list. This takes the global lock out of the picture and reduces the
contention problems to within a single filesystem. This doesn't get
rid of contention as the locks still have global CPU scope, but it
does isolate operations on different superblocks form each other.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Dave Chinner 2015-03-04 12:37:22 -05:00 • committed by Josef Bacik
parent cbedaac634
commit 74278da9f7
10 changed files with 57 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

28
fs/inode.c
View file

@ -28,8 +28,8 @@
* inode->i_state, inode->i_hash, __iget()
* Inode LRU list locks protect:
* inode->i_sb->s_inode_lru, inode->i_lru
* inode_sb_list_lock protects:
* sb->s_inodes, inode->i_sb_list
* inode->i_sb->s_inode_list_lock protects:
* inode->i_sb->s_inodes, inode->i_sb_list
* bdi->wb.list_lock protects:
* bdi->wb.b_{dirty,io,more_io,dirty_time}, inode->i_wb_list
* inode_hash_lock protects:
@ -37,7 +37,7 @@
*
* Lock ordering:
*
* inode_sb_list_lock
* inode->i_sb->s_inode_list_lock
* inode->i_lock
* Inode LRU list locks
*
@ -45,7 +45,7 @@
* inode->i_lock
*
* inode_hash_lock
* inode_sb_list_lock
* inode->i_sb->s_inode_list_lock
* inode->i_lock
*
* iunique_lock
@ -57,8 +57,6 @@ static unsigned int i_hash_shift __read_mostly;
static struct hlist_head *inode_hashtable __read_mostly;
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_hash_lock);
__cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_sb_list_lock);
/*
* Empty aops. Can be used for the cases where the user does not
* define any of the address_space operations.
@ -426,18 +424,18 @@ static void inode_lru_list_del(struct inode *inode)
*/
void inode_sb_list_add(struct inode *inode)
{
spin_lock(&inode_sb_list_lock);
spin_lock(&inode->i_sb->s_inode_list_lock);
list_add(&inode->i_sb_list, &inode->i_sb->s_inodes);
spin_unlock(&inode_sb_list_lock);
spin_unlock(&inode->i_sb->s_inode_list_lock);
}
EXPORT_SYMBOL_GPL(inode_sb_list_add);
static inline void inode_sb_list_del(struct inode *inode)
{
if (!list_empty(&inode->i_sb_list)) {
spin_lock(&inode_sb_list_lock);
spin_lock(&inode->i_sb->s_inode_list_lock);
list_del_init(&inode->i_sb_list);
spin_unlock(&inode_sb_list_lock);
spin_unlock(&inode->i_sb->s_inode_list_lock);
}
}
@ -594,7 +592,7 @@ void evict_inodes(struct super_block *sb)
struct inode *inode, *next;
LIST_HEAD(dispose);
spin_lock(&inode_sb_list_lock);
spin_lock(&sb->s_inode_list_lock);
list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) {
if (atomic_read(&inode->i_count))
continue;
@ -610,7 +608,7 @@ void evict_inodes(struct super_block *sb)
spin_unlock(&inode->i_lock);
list_add(&inode->i_lru, &dispose);
}
spin_unlock(&inode_sb_list_lock);
spin_unlock(&sb->s_inode_list_lock);
dispose_list(&dispose);
}
@ -631,7 +629,7 @@ int invalidate_inodes(struct super_block *sb, bool kill_dirty)
struct inode *inode, *next;
LIST_HEAD(dispose);
spin_lock(&inode_sb_list_lock);
spin_lock(&sb->s_inode_list_lock);
list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) {
spin_lock(&inode->i_lock);
if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) {
@ -654,7 +652,7 @@ int invalidate_inodes(struct super_block *sb, bool kill_dirty)
spin_unlock(&inode->i_lock);
list_add(&inode->i_lru, &dispose);
}
spin_unlock(&inode_sb_list_lock);
spin_unlock(&sb->s_inode_list_lock);
dispose_list(&dispose);
@ -890,7 +888,7 @@ struct inode *new_inode(struct super_block *sb)
{
struct inode *inode;
spin_lock_prefetch(&inode_sb_list_lock);
spin_lock_prefetch(&sb->s_inode_list_lock);
inode = new_inode_pseudo(sb);
if (inode)