Re: [PATCH, RFC] vm: Add an tuning knob for vm.max_writeback_pages

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On Mon, Aug 31 2009, Theodore Tso wrote:
> At the risk of asking a stupid question, what *is* range_cyclic and
> what is it trying to do?  I've been looking at the code and am I'm
> getting myself very confused about what the code is trying to do and
> what was its original intent.

Range cyclic means that the current writeback in ->writepages() should
start where it left off the last time, non-range cyclic starts off at
->range_start. ->writepages() can use mapping->writeback_index to store
such information.

-- 
Jens Axboe

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