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btrfs: separate superblock items out of fs_info

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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
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4
fs/btrfs/tree-log.c
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@ -2118,9 +2118,9 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
BUG_ON(ret);
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
btrfs_set_super_log_root(&root->fs_info->super_for_commit,
btrfs_set_super_log_root(root->fs_info->super_for_commit,
log_root_tree->node->start);
btrfs_set_super_log_root_level(&root->fs_info->super_for_commit,
btrfs_set_super_log_root_level(root->fs_info->super_for_commit,
btrfs_header_level(log_root_tree->node));
log_root_tree->log_batch = 0;