>>>>> On Wed, 09 Jan 2002 21:01:13 +0100, Steffen Persvold <sp@scali.no> said: Steffen> So, what about this patch (posted earlier) David ? Have you Steffen> seen the comments from Keith ? Keith's concerns are legitimate and to some degree apply even for ia64. On ia64, we need to be careful to avoid mapping the same physical page with different memory attributes. If more and more drivers are starting to use write-combine mappings, we need to solve this problem properly. I don't have a solution off hand (I suspect we'll have to keep track of which i/o regions are mapped how) and don't have time to work on it now. I'd recommend to maintain a separate patch for now, until a proper solution is ready (which will have to take non-ia64 platforms into consideration, of course). --david PS: I apologize for not being as responsive yet as I'd like to be. I'm done with the book (well, 99.999% as my wife put it...) and ready to attack my backlog of kernel work (and other things, such as user-level unwind support). I just had a spell of bad luck this week, which didn't help. Hopefully, over the next one or two weeks, things will start to go back to normal.Received on Wed Jan 09 19:03:29 2002
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