On 01/16/2014 08:45 AM, Christoph Lameter wrote: > On Tue, 14 Jan 2014, Dave Hansen wrote: >> With the current code, if you wanted to turn off the double-cmpxchg abd >> get a 56-byte 'struct page' how would you do it? Can you do it with a >> .config, or do you need to hack the code? > > Remove HAVE_ALIGNED_STRUCT_PAGE from a Kconfig file. SLUB 'selects' it, so it seems to pop back up whenever SLUB is on: $ grep STRUCT_PAGE ~/build/64bit/.config CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y $ vi ~/build/64bit/.config ... remove from Kconfig file $ grep STRUCT_PAGE ~/build/64bit/.config $ make oldconfig ... no prompt $ grep STRUCT_PAGE ~/build/64bit/.config CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y -- 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>