zfs code - Dec 2007 - sync-to-convergence - What is it?

I am trying to understand the arc code. In arc_write_done there is a comment
about sync-to-convergence. What is sync-to-convergence and when would that
happen? Why would arc_write_done throw away the "exists" header and
replace it with a new header?

Thanks in advance for any help anyone can give.

Duff
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This messages posted from opensolaris.org

Jeff explained the underlying principle in a recent message:

http://mail.opensolaris.org/pipermail/zfs-code/2007-December/000781.html

Mark or someone else may be able to explain how this relates to the ARC.

- Eric

On Wed, Dec 19, 2007 at 10:50:41AM -0800, J Duff wrote:
> I am trying to understand the arc code. In arc_write_done there is a
> comment about sync-to-convergence. What is sync-to-convergence and
> when would that happen? Why would arc_write_done throw away the
> "exists" header and replace it with a new header?
> 
> Thanks in advance for any help anyone can give.
> 
> Duff
> --
> This messages posted from opensolaris.org
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> zfs-code mailing list
> zfs-code at opensolaris.org
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Eric Schrock, FishWorks                        http://blogs.sun.com/eschrock