On Mon, 24 Oct 2011 00:11:57 +0200, Daniel Vetter <dan...@ffwll.ch> wrote:
> This patch only fixes things up so that we prefault the entire page range > and not just the first PAGE_SIZE bytes (i.e. at most 2 pages). So I don't > see the risk of extending the current behaviour to all pages. Userspace > can already see these zero writes, but only when doing something stupid. When we posted a patch to instead fix fault_in_pages_writeable, Andrew complained that we'd have modified memory even on a short read, which wasn't considered polite. Could we read/write the same value and avoid that problem? Also, we should be fixing fault_in_pages_* going forward, rather than kludging in more code. And, we'd get to remove the version in ntfs, which should end in a patch that removes more code than it adds... -- keith.pack...@intel.com
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