On Tue, 24 Nov 2015, Helge Deller wrote:
> > Hi > > > > Since the kernel 4.4-rc2 I'm getting frequent boot failures on PA-RISC. > > When I revert this patchset, the crashes are gone. > > > [ 3.296666] CPU(s): 4 out of 4 PA8900 (Shortfin) at 1000.000000 MHz > > online > > Hi Mikulas, > > Yes, I've seen this as well. > It affects only the PA8900 CPUs, while all PA8500-PA8700 machines seem to > work fine. > I do have a temporary 3-line patch to avoid the crashes which I'll push to my > tree shortly. > I'm still investigating why it only affects the PA8900 CPUs, but I assume > it's related to the cache aliasing of those CPUs. > I'll keep you updated. > > Helge The PA-RISC specification doesn't allow aliasing on non-equaivalent addresses. Can the kernel map a piece of kernel data to other virtual address? If yes, we can't use big pages to map kernel data. Mikulas -- 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/
