--- Andrew Morton <[email protected]> wrote:
> Rik van Riel <[email protected]> wrote:
> > The question is, why is the page not yet back on
> the
> > LRU by the time the data write completes ?
>
> Could be they're ext3 pages which were written out
> by kjournald. Such
> pages are marked dirty but have clean buffers.
> ext3_writepage() will
> discover that the page is actually clean and will
> mark it thus without
> performing any I/O.
>
I had conjectured that something like this might be
happening without knowing the details of how ext3
implements writepage. The filesystem tested on here
is ext3.
> Shantanu, I suggest you add some instrumentation
> there too, see if it's
> working. (That'll be non-trivial. Just because we
> hit PAGE_CLEAN: here
> doesn't necessarily mean that the page will be
> reclaimed).
I'll do so and report back the results.
Shantanu
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