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Optimize extfs syncing inodes.

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This commit is contained in:
Jonas 'Sortie' Termansen 2014-10-01 22:16:33 +02:00
parent 572481098a
commit 8f0db0f541
4 changed files with 25 additions and 5 deletions
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5
ext/filesystem.cpp
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@ -50,6 +50,7 @@ Filesystem::Filesystem(Device* device)
block_size = device->block_size;
mru_inode = NULL;
lru_inode = NULL;
dirty_inode = NULL;
inode_size = this->sb->s_inode_size;
num_blocks = sb->s_blocks_count;
num_groups = divup(this->sb->s_blocks_count, this->sb->s_blocks_per_group);
@ -90,8 +91,8 @@ void Filesystem::Dirty()
void Filesystem::Sync()
{
for ( Inode* iter = mru_inode; iter; iter = iter->next_inode )
iter->Sync();
while ( dirty_inode )
dirty_inode->Sync();
for ( size_t i = 0; i < num_groups; i++ )
if ( block_groups && block_groups[i] )
block_groups[i]->Sync();

1
ext/filesystem.h
View file

@ -45,6 +45,7 @@ public:
uint32_t num_inodes;
Inode* mru_inode;
Inode* lru_inode;
Inode* dirty_inode;
time_t mtime_realtime;
time_t mtime_monotonic;
bool dirty;

22
ext/inode.cpp
View file

@ -53,6 +53,8 @@ Inode::Inode(Filesystem* filesystem, uint32_t inode_id)
{
this->prev_inode = NULL;
this->next_inode = NULL;
this->prev_dirty = NULL;
this->next_dirty = NULL;
this->filesystem = filesystem;
this->reference_count = 1;
this->inode_id = inode_id;
@ -969,15 +971,29 @@ void Inode::RemoteUnref()
void Inode::Dirty()
{
dirty = true;
if ( !dirty )
{
dirty = true;
prev_dirty = NULL;
next_dirty = filesystem->dirty_inode;
if ( next_dirty )
next_dirty->prev_dirty = this;
filesystem->dirty_inode = this;
}
data_block->Dirty();
Use();
}
void Inode::Sync()
{
if ( dirty )
data_block->Sync();
if ( !dirty )
return;
data_block->Sync();
(prev_dirty ? prev_dirty->next_dirty : filesystem->dirty_inode) = next_dirty;
if ( next_dirty )
next_dirty->prev_dirty = prev_dirty;
prev_dirty = NULL;
next_dirty = NULL;
dirty = false;
}

2
ext/inode.h
View file

@ -35,6 +35,8 @@ public:
public:
Inode* prev_inode;
Inode* next_inode;
Inode* prev_dirty;
Inode* next_dirty;
Block* data_block;
struct ext_inode* data;
Filesystem* filesystem;