On Tue, Dec 03, 2013 at 02:55:23PM -0600, æèç Yang Su Li wrote:
> I am trying to understand XFS a little bit better, especially its journal
> process. Unfortunately, I am having trouble find documentation in this
> The general XFS documentation (
> has been quite helpful, but it doesn't describe the journal part of XFS. I
> also found some kernel documentation ablout XFS's delayed logging (
> which talks about the journal process a bit. But it seems to assume a lot
> of prior knowledge of how the original XFS logging works to completely
> understand what the author is talking about; and the term it uses (like
> checkpoint) seem to have complete different meaning from, say, ext4.
> So I am wondering, is there some kind of (any kind of ) documentation on
> XFS journaling? Ideally it will cover the major data structure and major
> code flow, but even a very high level, incomplete overview would be better
> than what I have now, which is essentially nothing. And if so, where can I
> find it?
The original design docs are posted here:
log_mgr.pdf might be what you need.