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ext3 and jbd's write path

Posted by Hu, Ming 
ext3 and jbd's write path
February 07, 2012 11:00AM
Hi,all
Recently I am reading the ext3's source code. I am focusing on the "ordered" model. I found two places for the kernel to do "submit_io" to the block device layer.
One is in the kjournald's "journal_submit_commit_record" --> "journal_submit_data_buffers";
the other one is "ext3_ordered_writepage" --> "block_write_full_page". These two path are executed by different kernel thread.
But when is the data actually written to the disk?

Thanks!
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