On 29.06.2011 20:13, Josef Bacik wrote:
On 06/29/2011 12:32 PM, Arne Jansen wrote:
Add a READAHEAD extent buffer flag.
Add a function to trigger a read with this flag set.
Changes v2:
- use extent buffer flags instead of extent state flags
Signed-off-by: Arne Jansen<sensi...@gmx.net>
---
fs/btrfs/disk-io.c | 32 ++++++++++++++++++++++++++++++++
fs/btrfs/disk-io.h | 2 ++
fs/btrfs/extent_io.h | 1 +
3 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0339cc0..0195172 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -945,6 +945,38 @@ int readahead_tree_block(struct btrfs_root *root, u64
bytenr, u32 blocksize,
return ret;
}
+int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32
blocksize,
+ int mirror_num, struct extent_buffer **eb)
+{
+ struct extent_buffer *buf = NULL;
+ struct inode *btree_inode = root->fs_info->btree_inode;
+ struct extent_io_tree *io_tree =&BTRFS_I(btree_inode)->io_tree;
+ int ret;
+
+ buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
+ if (!buf)
+ return 0;
+
+ set_bit(EXTENT_BUFFER_READAHEAD,&buf->bflags);
+
+ ret = read_extent_buffer_pages(io_tree, buf, 0, 0, 1, btree_get_extent,
+ mirror_num);
This patch doesn't compile for me, it says there are too many arguments here.
Ok, commit d1310b2e0cd98eb134 changed a lot here, I'll take a lot how to
rebase this and send a v4.
Thanks,
Arne
[root@destiny btrfs-work]# make M=fs/btrfs
CC [M] fs/btrfs/disk-io.o
fs/btrfs/disk-io.c: In function ‘reada_tree_block_flagged’:
fs/btrfs/disk-io.c:963:6: warning: passing argument 5 of
‘read_extent_buffer_pages’ makes pointer from integer without a cast [enabled
by default]
fs/btrfs/extent_io.h:244:5: note: expected ‘struct extent_map * (*)(struct
inode *, struct page *, size_t, u64, u64, int)’ but argument is of type ‘int’
fs/btrfs/disk-io.c:963:6: warning: passing argument 6 of
‘read_extent_buffer_pages’ makes integer from pointer without a cast [enabled
by default]
fs/btrfs/extent_io.h:244:5: note: expected ‘int’ but argument is of type
‘struct extent_map * (*)(struct inode *, struct page *, size_t, u64, u64,
int)’
fs/btrfs/disk-io.c:963:6: error: too many arguments to function
‘read_extent_buffer_pages’
fs/btrfs/extent_io.h:244:5: note: declared here
make[1]: *** [fs/btrfs/disk-io.o] Error 1
make: *** [_module_fs/btrfs] Error 2
Thanks,
Josef
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