On Friday, December 10, 2010 01:36:09 pm Jesse Barnes wrote: > [Actually cc'ing Matthew this time] > > On Fri, 10 Dec 2010 12:30:08 -0800 > Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote: > > > On Wed, 08 Dec 2010 14:36:06 -0700 > > Bjorn Helgaas <bjorn.helgaas@xxxxxx> wrote: > > > > > > > > This adds arch_remove_reservations(), which an arch can implement if it > > > needs to protect part of the address space from allocation. > > > > > > Sometimes that can be done by just requesting a resource. This hook is to > > > cover cases where protected area doesn't fit well in the hierarchical > > > resource tree. For example, x86 BIOS E820 reservations are not related > > > to devices, so they may overlap part of, all of, or more than a device > > > resource. > > > > > > Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx> > > > --- > > > > Hm, this is bigger than the simple change of just avoiding the high 2M; > > Linus have you checked it out yet? It's nicer than simply adjusting > > PCIBIOS_MAX_MEM since it will affect all resource callers rather than > > just PCI, but it's definitely bigger. Dan Williams also reproduced the problem on a 2530p and tested this series (though I think he actually tested a backport in Fedora): https://bugzilla.kernel.org/show_bug.cgi?id=23542#c7 https://bugzilla.kernel.org/show_bug.cgi?id=23542#c23 The simple PCIBIOS_MAX_MEM_32 change below will fix the 2530p problem, but it won't help fix the nx6325 problem Rafael reported; details at: https://bugzilla.kernel.org/show_bug.cgi?id=23332#c20 Rafael did confirm on #acpi Wednesday that the full series fixed his nx6325. Bjorn > > If you want just the simple change for 2.6.37 I can push that, but > > we'll need to get a tested-by from Matthew: > > > > diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h > > index ca0437c..aef9f77 100644 > > --- a/arch/x86/include/asm/pci.h > > +++ b/arch/x86/include/asm/pci.h > > @@ -141,7 +141,7 @@ void dma32_reserve_bootmem(void); > > > > /* generic pci stuff */ > > #include <asm-generic/pci.h> > > -#define PCIBIOS_MAX_MEM_32 0xffffffff > > +#define PCIBIOS_MAX_MEM_32 0xfff00000 > > > > #ifdef CONFIG_NUMA > > /* Returns the node based on pci bus */ > > > > and I'll queue up this set for 2.6.38. > > > > Thanks, > > > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
