On Thu, Apr 05, 2018 at 06:37:24PM +0530, Chandan Rajendra wrote:
> Sorry, I wasn't clear enough with my explaination. I actually meant to say
> that not all blocks mapped by a page might be dirty and hence only a subset
> of the dirty blocks might need to be written to the disk.
But we only track dirtiness on a per-page level. That's all the page
cache gives us. Remember, the function name is ext4_bio_write_page()
or {btrfs,xfs,ext4}_writepage() --- we will always be writing a full
page at a time.
- Ted
