Re: Wrapper fs Code (wrapfs)

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On Tue, Aug 08, 2006 at 12:57:29AM -0700, UZAIR LAKHANI wrote:
> --- Josef Sipek <jsipek@xxxxxxxxxxxxxxxxx> wrote:
> > The data is cached in the page cache.
> 
> Can we not by some way invalidate the old page and
> force the kernel to read the actual page i.e. can we
> not by any way by-pass the page cache for wrapfs read.
 
Currently, no. We (the stackable fs) would need to invalidate the page
associated with ext3. ext3 won't invalidate our pages, so we would have to
do it ourselves. To do that, we'd need some kind of callback so that when an
ext3 page changes, we can propagate the change.
 
> How ext3 e.g. always get the updated data on read.

I am not sure what you mean.

Josef "Jeff" Sipek.

-- 
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all progress
depends on the unreasonable man.
		- George Bernard Shaw
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