Re: [PATCH] vmscan: remove wait_on_page_writeback() from pageout()

From: Minchan Kim
Date: Wed Jul 28 2010 - 12:30:14 EST

On Wed, Jul 28, 2010 at 04:46:54PM +0800, Wu Fengguang wrote:
> And the wait page-by-page behavior of pageout(SYNC) will lead to very
> long stall time if running into some range of dirty pages. So it's bad
> idea anyway to call wait_on_page_writeback() inside pageout().

Although we remove it in pageout, shrink_page_list still has it.
So it would result in long stall. And it is for lumpy reclaim which
means it's a trade-off, I think.

Kind regards,
Minchan Kim
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