Messages in this thread |  | | | Date | Wed, 11 Jul 2007 09:55:39 +0100 | | From | Christoph Hellwig <> | | Subject | Re: -mm merge plans -- anti-fragmentation |
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On Tue, Jul 10, 2007 at 12:11:45PM -0500, Dave McCracken wrote: > Ok, maybe disaster is too strong a word. But any kind of order>0 allocation > still has to be approached with fear and caution, with a well tested fallback > in the case of the inevitable failures. How many driver writers would have > benefited from using order>0 pages, but turned aside to other less optimal > solutions due to their unreliability? We don't know, and probably never > will. Those people have moved on and won't revisit that design decision.
If you look at almost any other OS they use high-order pages quite a lot. At least Solaris, IRIX and UnixWare do.
Also not that once we have a high-order pagecache it gives a nice way to simply reclaim a high-order page directly :)
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