Commit 98caf953 authored by Goldwyn Rodrigues's avatar Goldwyn Rodrigues Committed by David Sterba
Browse files

btrfs: allocate file_ra_state on stack in readahead_cache 



Instead of allocating file_ra_state using kmalloc, allocate on stack.
sizeof(struct readahead) = 32 bytes.

Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 0ff40a91

fs/btrfs/free-space-cache.c

+3 −9
Original line number Diff line number Diff line
@@ -344,19 +344,13 @@ int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans, 


static void readahead_cache(struct inode *inode)

{

	struct file_ra_state *ra;

	struct file_ra_state ra;

	unsigned long last_index;



	ra = kzalloc(sizeof(*ra), GFP_NOFS);

	if (!ra)

		return;



	file_ra_state_init(ra, inode->i_mapping);

	file_ra_state_init(&ra, inode->i_mapping);

	last_index = (i_size_read(inode) - 1) >> PAGE_SHIFT;



	page_cache_sync_readahead(inode->i_mapping, ra, NULL, 0, last_index);



	kfree(ra);

	page_cache_sync_readahead(inode->i_mapping, &ra, NULL, 0, last_index);

}



static int io_ctl_init(struct btrfs_io_ctl *io_ctl, struct inode *inode,