On Wed, 2008-01-09 at 21:21 -0500, Pavel Roskin wrote: > On Wed, 2008-01-09 at 20:03 -0600, Matt Mackall wrote: > > > That makes it way too easy for drivers of questionable legality to just > > clear that bit. Also, we've got a shortage of page bits, etc. > > If we ever have this problem, the bit can be changed in the kernel to > fool those drivers (I hope the shortage is not so dire that there will > be no more bits left).
That's what we call an arms race. And yes, page bits are close to running out on 32-bit. > I don't think evil drivers should be a problem per se. There are > existing non-free drivers that still need to be traced over and over > again. I guess ndiswrapper could use tracing for Windows drivers that > don't know anything about Linux page flags. > > Last but not least, mmiotrace should be useful for free drivers in the > first place to have a legitimate reason to be in the kernel. I definitely agree that tracing MMIO is an extremely useful feature. I've implemented it myself once already for 2.4. -- Mathematics is the supreme nostalgia of our time. -- 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/
