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Btrfs: Don't do btree balance_dirty_pages on old kernels, it stalls forever 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-05-09 11:52:25 -04:00
parent 323da79c9f
commit 188de649c5
1 changed files with 8 additions and 0 deletions
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8
fs/btrfs/disk-io.c
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@ -1655,6 +1655,11 @@ void btrfs_throttle(struct btrfs_root *root)
void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
{
/*
* looks as though older kernels can get into trouble with
* this code, they end up stuck in balance_dirty_pages forever
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
struct extent_io_tree *tree;
u64 num_dirty;
u64 start = 0;
@ -1670,6 +1675,9 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
balance_dirty_pages_ratelimited_nr(
root->fs_info->btree_inode->i_mapping, 1);
}
#else
return;
#endif
}
void btrfs_set_buffer_defrag(struct extent_buffer *buf)