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authorJan Kara <jack@suse.cz>2016-04-24 00:56:07 -0400
committerTheodore Ts'o <tytso@mit.edu>2016-04-24 00:56:07 -0400
commit41617e1a8dec9fe082ba5dec26bacb154eb55482 (patch)
treecad9847e725526c8af355f116ec5cf317dc2d24c /fs/ext4
parent3957ef53a5033bd519b19cf375061be1929bdb5f (diff)
jbd2: add support for avoiding data writes during transaction commits
Currently when filesystem needs to make sure data is on permanent storage before committing a transaction it adds inode to transaction's inode list. During transaction commit, jbd2 writes back all dirty buffers that have allocated underlying blocks and waits for the IO to finish. However when doing writeback for delayed allocated data, we allocate blocks and immediately submit the data. Thus asking jbd2 to write dirty pages just unnecessarily adds more work to jbd2 possibly writing back other redirtied blocks. Add support to jbd2 to allow filesystem to ask jbd2 to only wait for outstanding data writes before committing a transaction and thus avoid unnecessary writes. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ext4_jbd2.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 5f5846211095..f1c940b38b30 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -362,7 +362,8 @@ static inline int ext4_journal_force_commit(journal_t *journal)
static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode)
{
if (ext4_handle_valid(handle))
- return jbd2_journal_file_inode(handle, EXT4_I(inode)->jinode);
+ return jbd2_journal_inode_add_write(handle,
+ EXT4_I(inode)->jinode);
return 0;
}