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 */ -- 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>