On Fri, 9 Sep 2005, Keith Owens wrote: > The new ia64 MCA/INIT handlers[1] (think of them as super NMI) run on > separate stacks. 99% of the changes for these new handlers is ia64 > only code, however they need a couple of scheduler hooks to support > these extra stacks. The complete patch set will be coming through the > ia64 tree, this RFC covers just the scheduler changes, so they do not > come as a surprise when the ia64 tree is rolled up. > > [1] http://marc.theaimsgroup.com/?l=linux-ia64&m=112537827113545&w=2 > and the following patches.
Thanks that gave a lot of background. > This patch adds two small hooks that can be safely called from MCA/INIT > context. If other architectures want to support NMI on separate stacks > then they can also use these functions. Well x86_64 already does this with NMI being setup as ISTs, the difference is that there we use a register to access current (via PDA/%gs). I might have missed this in the URL you posted, but how come IA64 can't do this via r13? Thanks, Zwane - 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/