On Fri, Mar 16, 2007 at 08:50:01AM +0000, Ian Campbell wrote: > On Fri, 2007-03-16 at 16:59 +0900, Magnus Damm wrote: > > On 3/16/07, Ian Campbell <[EMAIL PROTECTED]> wrote: > > > On Fri, 2007-03-16 at 11:40 +0900, Magnus Damm wrote: > > > > Right. And maybe it's a good idea to make sure that this feature is > > > > actually supported by kexec-tools before adding code to the kernel? > > > > > > I sent patches to the fastboot list at the same time I sent these ones > > > to support differences in the underlying hypervisor architecture in the > > > tools. > > > > Oh, that's good news. I have not seen them yet... > > > > > They haven't appeared in the archives yet so I fear they have gone > > > astray. I'll resend when I get to the office in a bit. > > > > ... so please resend. > > > > We've just frozen the kexec-tools-testing tree for an upcoming > > release, but if you resend soon and your patches are trivial you may > > be able to talk us into merging your changes before the release.. > > Will resend in about an hour. > > > > > My gut feeling about this is that you are begging for trouble. The > > > > kexec/kdump solution is fragile just by itself, and trying to go > > > > between architectures is just going to be painful. > > > > > > It works fine under Xen and I think going from 64Xen+32Kernel->32Kernel > > > makes more sense than going from 64Xen+32Kernel->64Kernel. As I said > > > originally I'm not so convinced it makes sense in the native case but I > > > see no reason to outlaw it (people get to keep both pieces etc...) > > > > For kexec I think it is just fine. But for kdump, are you sure things > > will work out ok? There are some differences between the i386 and > > x86_64 kexec-tools code and I wonder if feeding i386 info into an > > x86_64 kernel will work properly. > > It seems to work fine with Xen. A 32 bit kernel handles the 64 bit dump > just fine, my pre-kdump kernel is 32 bit but it doesn't have much to do > in this case I think. > > I don't know about native. My gut feeling is that if the mechanism of > actually kexecing between 64 and 32 bit works then there is no problem > with the crash dump part of the equation. >
I also think so. If kexec works then kdump should work too. There might be small issues here and there but can't think of any major one. Thanks Vivek - 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/
