REF_PRISTINE node ...

REF_PRISTINE node ...

[Sherwin Liu]

I'm running Linux v2.4.18 under Montavista Linux on a 
PPC440GP. I have many JFFS2 partitions mounted and a 
test program that opens files on these partitions and 
constantly writes and reads these files. Once in a 
while I get this isolated message:

"REF_PRISTINE node at XX had a previous non-hole frag 
in the same page. Tell dwmw2."

Is this just a debugging message, or is it an 
indication of something wrong?

Thanks in advance...

-Sherwin
swl@dolby.com

Re: REF_PRISTINE node ...

[David Woodhouse]

On Wed, 2003-11-19 at 08:38 -0800, Sherwin Liu wrote:
> "REF_PRISTINE node at XX had a previous non-hole frag 
> in the same page. Tell dwmw2."
> 
> Is this just a debugging message, or is it an 
> indication of something wrong?

It's basically harmless, and should be gone if you update to the current
CVS JFFS2 code. 

A while ago, I implemented a garbage-collection optimisation; if a node
is expected to be identical when we write out a replacement, we can
avoid decompressing and recompressing it if we just copy the whole thing
intact. So I start keeping track of such 'pristine' nodes which were an
optimal representation of their data... and that message warns me of one
case where such a node marked REF_PRISTINE but shouldn't have been.

-- 
dwmw2