On Thu, 2007-12-20 at 15:47 +0100, Peter Zijlstra wrote: > On Thu, 2007-12-20 at 14:09 +0000, Hugh Dickins wrote:
> > Interesting divergence: make_pages_present faults in writable pages > > in a writable vma, whereas the file case's force_page_cache_readahead > > doesn't even insert the pages into the mm. > > Yeah, the find_vma and write fault thing are the reason I didn't use > make_pages_present. > > I had noticed the difference in pte population between > force_page_cache_readahead and make_pages_present, but it seemed to me > that writing a function to walk the page tables and populate the > swapcache but not populate the ptes wasn't worth the effort. Ah, another, more important difference: force_page_cache_readahead will not wait for the read to complete, whereas get_user_pages() will be fully synchronous. I think I'd better come up with something else then,.. -- 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/
