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btrfs: allocate file_ra_state on stack in readahead_cache

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

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Goldwyn Rodrigues 2021-07-27 16:17:26 -05:00 committed by David Sterba
parent 0ff40a910f
commit 98caf9531e
1 changed files with 3 additions and 9 deletions
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12
fs/btrfs/free-space-cache.c
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@ -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,