From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> I want to use the _mapcount field to record what a page is in use as. This can help with debugging and we can also expose that information to userspace through /proc/kpageflags to help diagnose memory usage (not included as part of this patch set). First, we need s390 to stop using _mapcount for its own purposes; Martin, I hope you have time to look at this patch. I must confess I don't quite understand what the different bits are used for in the upper nybble of the _mapcount, but I tried to replicate what you were doing faithfully. Matthew Wilcox (4): s390: Use _refcount for pgtables mm: Split page_type out from _map_count mm: Mark pages allocated through vmalloc mm: Mark pages in use for page tables arch/s390/mm/pgalloc.c | 21 +++++++++-------- fs/proc/page.c | 2 +- include/linux/mm.h | 2 ++ include/linux/mm_types.h | 13 +++++++---- include/linux/page-flags.h | 57 ++++++++++++++++++++++++++++++---------------- kernel/crash_core.c | 1 + mm/page_alloc.c | 13 ++++------- mm/vmalloc.c | 2 ++ scripts/tags.sh | 6 ++--- 9 files changed, 72 insertions(+), 45 deletions(-) -- 2.16.1 -- 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>
