On Mon, 29 Jan 2007 17:31:20 -0800 "Martin J. Bligh" <[EMAIL PROTECTED]> wrote:
> Peter Zijlstra wrote: > > On Sun, 2007-01-28 at 14:29 -0800, Andrew Morton wrote: > > > >> As Christoph says, it's very much preferred that code be migrated over to > >> kmap_atomic(). Partly because kmap() is deadlockable in situations where a > >> large number of threads are trying to take two kmaps at the same time and > >> we run out. This happened in the past, but incidences have gone away, > >> probably because of kmap->kmap_atomic conversions. > > > >> From which callsite have you measured problems? > > > > CONFIG_HIGHPTE code in -rt was horrid. I'll do some measurements on > > mainline. > > > > CONFIG_HIGHPTE is always horrid -we've known that for years. We have? What's wrong with it? <looks around for bug reports> > Don't use it. > > If that's all we're fixing here, I'd be highly suspect ... highpte uses atomic kmaps - it is unrelated to this work. - 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/