Shaohua Li wrote: >> So write to a file, right? Yes, it can avoid use move to swap, and >> should be feasible. > Say you want to write guest pages out to file A of back store fs, in > kvm->writepage(), we could do: > 1. lower_page = grap_cache_page(file A's mapping) > 2. file A's ->prepare_write(lower_page) > 3. copy kvm guest page to lower_page > 4. file A's ->commit_write(lower_page) > then guest page can be freed. Just like the stack fs does. The > downside is step 1 needs allocate a new page.
Yeah. Hopefully we can find a better solution, the copy isn't pretty (though it's probably not too bad from a performance point of view compared to the IPIs involved). -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
