Messages in this thread | | | Date | Sat, 16 Sep 2006 14:38:19 +0800 | From | "Zhou Yingchao" <> | Subject | Re: Re: Re: Re: [RFC] PAGE_RW Should be added to PAGE_COPY ? |
| |
> >I replied too hastily. I've since looked back to your original mail Thank you for your patience. >(in which you do mention Infiniband as an example, which has now >helped to jog my brain), and realized that I was misinterpreting >what you meant by "user-level network driver". > >The problem, as I now see it, is precisely with do_wp_page()'s >TestSetPageLocked, as you first said. Yeah, I think you get it. ^_^ > >Yes, it would be good if we could do that check in some other, >reliable way. The problem is that can_share_swap_page has to >check page_mapcount (and PageSwapCache) and page_swapcount in >an atomic way: the page lock is what we have used to guard the >movement between mapcount and swapcount. > >I'll try to think whether we can do that better, >but not until next week. Ok, I expect for good news. > >Hugh
Yingchao Zhou
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |