xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

nilfs2: add read ahead mode to nilfs_btnode_submit_block

Browse Source 
This adds mode argument to nilfs_btnode_submit_block() function and
allows it to issue a read-ahead request.

An optional submit_ptr argument is also added to store the actual
block address for which bio is sent.  submit_ptr is used for a series
of read-ahead requests, and helps to decide if each requested block is
continous to the previous one on disk.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi
2010-07-18 10:42:23 +09:00
parent f8e6cc013b
commit 26dfdd8e29
4 changed files with 22 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
fs/nilfs2/btree.c
View File

@@ -71,9 +71,10 @@ static int nilfs_btree_get_block(const struct nilfs_bmap *btree, __u64 ptr,
{
struct address_space *btnc = &NILFS_BMAP_I(btree)->i_btnode_cache;
struct buffer_head *bh;
sector_t pbn = 0;
int err;
err = nilfs_btnode_submit_block(btnc, ptr, 0, bhp);
err = nilfs_btnode_submit_block(btnc, ptr, pbn, READ, bhp, &pbn);
if (err)
return err == -EEXIST ? 0 : err;