On Mon, Dec 24, 2012 at 3:34 PM, H. Peter Anvin <[email protected]> wrote: > On 12/21/2012 09:11 PM, Yinghai Lu wrote: >> On Fri, Dec 21, 2012 at 7:25 PM, H. Peter Anvin <[email protected]> wrote: >>> On 12/21/2012 07:23 PM, Eric W. Biederman wrote: >>>> >>>> In this case YH has been working on the case of loading a kernel >>>> completely above 4G, and apparently he has also been testing the case of >>>> running a kernel with no memory below 4G. >>>> >>> >>> It is worth noting that we cannot run with *no* memory below 4G -- it is >>> not possible to run SMP at least without some memory below the 1M mark. >> >> yes need keep 8k or so for trampoline. >> >> but kdump only use one CPU. >> > > ... except we have an active request to change that, and the trampoline > is more like 20K depending on options.
looks like we should not worry that this now. kdump conf scripts always append some low range under 1M for second kernel. -- 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/
