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To remove mm_lock without adding an horrible system-wide lock before every i_mmap_lock etc.. we've to remove invalidate_range_begin/end. Then we can return to an older approach of doing only invalidate_page and serializing it with the PT lock against get_user_pages. That works fine for KVM but GRU will have to flush the tlb once every time we drop the PT lock, that means once per each 512 ptes on x86-64 etc... instead of a single time for the whole range regardless how large the range is. -- 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/ | |||||||||
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