Messages in this thread | | | Date | Fri, 20 Aug 2010 05:09:07 +0800 | From | Wu Fengguang <> | Subject | Re: [TESTCASE] Clean pages clogging the VM |
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On Thu, Aug 19, 2010 at 07:51:06PM +0800, Johannes Weiner wrote: > I am currently trying to get rid of all the congestion_wait() in the VM. > They are used for different purposes, so they need different replacement > mechanisms. > > I saw Shaohua's patch to make congestion_wait() cleverer. But I really > think that congestion is not a good predicate in the first place. Why > would the VM care about IO _congestion_? It needs a bunch of pages to > complete IO, whether the writing device is congested is not really > useful information at this point, I think.
I have the same feeling that the congestion_wait() calls are not pertinent ones. I'm glad to see people working on that exploring all possible replacement schemes.
Thanks, Fengguang
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