On 07/12/2013 09:53 PM, Christoph Lameter wrote: > On Fri, 12 Jul 2013, Chen Gang wrote: > >> Since all values which can be assigned to 'slub_debug' are 'unsigned >> long', recommend also to define 'slub_debug' as 'unsigned long' to >> match the type precisely > > The bit definitions in slab.h as well as slub.c all assume that these are > 32 bit entities. See f.e. the defition of the internal slub flags: > > /* Internal SLUB flags */ > #define __OBJECT_POISON 0x80000000UL /* Poison object */ > #define __CMPXCHG_DOUBLE 0x40000000UL /* Use cmpxchg_double */ > As far as I know, 'UL' means "unsigned long", is it correct ? Thanks. -- Chen Gang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>