* Christoph Lameter <cl@xxxxxxxxx> wrote: > On Sat, 26 Mar 2011, Christoph Lameter wrote: > > > Tejun: Whats going on there? I should be getting offsets into the per cpu > > area and not kernel addresses. > > Its a UP kernel running on dual Athlon. So its okay ... Argh.... The > following patch fixes it by using the fallback code for cmpxchg_double: > > > > Subject: per_cpu: Fixup cmpxchg_double for !SMP > > cmpxchg_double should only be provided for SMP. In the UP case > the GS register is not defined and the function will fail. > > Signed-off-by: Christoph Lameter <cl@xxxxxxxxx> I.e. the bug got introduced by: | commit b9ec40af0e18fb7d02106be148036c2ea490fdf9 | Author: Christoph Lameter <cl@xxxxxxxxx> | Date: Mon Feb 28 11:02:24 2011 +0100 | | percpu, x86: Add arch-specific this_cpu_cmpxchg_double() support and then the lockless allocator made use of it, right? Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>