Hi all, Thank you for precious comments. Linus Torvalds wrote: > > On Tue, 24 Jun 2008, Nick Piggin wrote: > >>What you want to do is not insane, but the way it is currently being >>done is. As I said, just clearing the uptodate bit might blow up your >>kernel pretty quickly from assertions in the vm. It should be going >>through the whole truncate or invalidate page machinery in order to >>do that. > > Fair enough. > > I would not mind, for example, leaving the uptodate bit, but removing it > from the radix tree or something like that (ie turning it into an > anonymous page for a page-cache page, just removing it from the > hash-queues for a buffer_head). If we move page caches with errors to another radix tree instead of just removing, we may be able to do special handlings: rewrite once, or check the page caches and get rid of them from user space, and so on. > Of course, that could cause other problems (eg any VM assertions that > shared mappings only contain non-anon pages). As Jan and Nick stated, this seems to need a great effort, but I think it is worthwhile to do. Thanks, -- Hidehiro Kawai Hitachi, Systems Development Laboratory Linux Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
