|To:||Eric Sandeen <sandeen@xxxxxxxxxxx>|
|Subject:||Re: REVIEW: Fix for incore extent corruption.|
|From:||Russell Cattelan <cattelan@xxxxxxxxxxx>|
|Date:||Fri, 19 Sep 2008 08:15:34 -0700|
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Eric Sandeen wrote:
Lachlan McIlroy wrote:Once I started looking at the pattern of extent buffer reductions before and after calling compact_page/full
I noticed even when we did a partial move the number of total buffers didn't go down.
I suppose you could end up with the stars and moon lining up just right and you would
do enough partial moves to free up a page.
Since this is all incore buffers space we are talking about all these space optimizations are
moot once the inode goes inactive and is flushed from cache.
I can't really think of a situation where not doing partial extent moves is really going to
create an issue but I might be missing something.
(FWIW, compact_full *does* get called reasonably frequently, but the memmove case is what's hard to hit...)
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