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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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2
fs/btrfs/scrub.c
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@@ -182,7 +182,7 @@ struct scrub_dev *scrub_setup_dev(struct btrfs_device *dev)
sdev->curr = -1;
atomic_set(&sdev->in_flight, 0);
atomic_set(&sdev->cancel_req, 0);
sdev->csum_size = btrfs_super_csum_size(&fs_info->super_copy);
sdev->csum_size = btrfs_super_csum_size(fs_info->super_copy);
INIT_LIST_HEAD(&sdev->csum_list);
spin_lock_init(&sdev->list_lock);