> On Tue, 2008-01-15 at 21:27 +0100, Miklos Szeredi wrote: > > > 1. Introduction > > > > > > This is the fourth version of my solution for the bug #2645: > > > > > > http://bugzilla.kernel.org/show_bug.cgi?id=2645 > > > > > > Changes since the previous version: > > > > > > 1) the case of retouching an already-dirty page pointed out > > > by Miklos Szeredi has been addressed; > > > > I'm a bit sceptical, as we've also pointed out, that this is not > > possible without messing with the page tables. > > > > Did you try my test program on the patched kernel? > > > > I've refreshed the patch, where we left this issue last time. It > > should basically have equivalent functionality to your patch, and is a > > lot simpler. There might be performance issues with it, but it's a > > good starting point. > > It has the same problem as Anton's in that it won't get triggered again > for an already dirty mapped page.
Yes, it's not better in this respect, than Anton's patch. And it might be worse performance-wise, since file_update_time() is sure to be slower, than set_bit(). According to Andrew, this may not actually matter in practice, but that would have to be benchmarked, I guess. Miklos -- 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/
