lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

btrfs: separate superblock items out of fs_info

Browse Source 
fs_info has now ~9kb, more than fits into one page. This will cause
mount failure when memory is too fragmented. Top space consumers are
super block structures super_copy and super_for_commit, ~2.8kb each.
Allocate them dynamically. fs_info will be ~3.5kb. (measured on x86_64)

Add a wrapper for freeing fs_info and all of it's dynamically allocated
members.

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba
2011-04-13 15:41:04 +02:00
committed by Chris Mason
parent c8174313a8
commit 6c41761fc6
12 changed files with 78 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
fs/btrfs/ctree.h
View File

@@ -936,8 +936,8 @@ struct btrfs_fs_info {
wait_queue_head_t transaction_blocked_wait;
wait_queue_head_t async_submit_wait;
struct btrfs_super_block super_copy;
struct btrfs_super_block super_for_commit;
struct btrfs_super_block *super_copy;
struct btrfs_super_block *super_for_commit;
struct block_device *__bdev;
struct super_block *sb;
struct inode *btree_inode;
@@ -2387,6 +2387,18 @@ static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
smp_mb();
return fs_info->closing;
}
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
kfree(fs_info->delayed_root);
kfree(fs_info->extent_root);
kfree(fs_info->tree_root);
kfree(fs_info->chunk_root);
kfree(fs_info->dev_root);
kfree(fs_info->csum_root);
kfree(fs_info->super_copy);
kfree(fs_info->super_for_commit);
kfree(fs_info);
}
/* root-item.c */
int btrfs_find_root_ref(struct btrfs_root *tree_root,