On 01/16/2014 10:34 AM, Christoph Lameter wrote: > On Tue, 14 Jan 2014, Dave Hansen wrote: >> This makes it *MUCH* more clear how the first few fields of >> 'struct page' get used by the slab allocators. > > I think this adds to the confusion. What you want to know is which other > fields overlap a certain field. After this patch you wont have that > anymore. Why does it matter *specifically* that "index shares space with freelist", or that "mapping shares space with s_mem"? No data is ever handed off in those fields. All that matters is that we know the _set_ of fields that gets reused, and that we preserve the ones which *need* their contents preserved (only flags and _count as far as I can tell). -- 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>