Kent wants more than 16 bits in page_type, so I resurrected this old patch and expanded it a bit. It's a bit more efficient than our current scheme (1 4-byte insn vs 3 insns of 13 bytes total) to test a single page type. Survives a simple smoke test, but I haven't done any specific testing of these changes. Matthew Wilcox (Oracle) (4): printf: Remove %pGt support mm: Introduce page_mapcount_is_type() mm: Support only one page_type per page zsmalloc: Use all available 24 bits of page_type Documentation/core-api/printk-formats.rst | 4 +- drivers/block/zram/Kconfig | 1 - fs/proc/internal.h | 3 +- include/linux/mm.h | 3 +- include/linux/page-flags.h | 76 +++++++++++------------ include/trace/events/mmflags.h | 10 --- kernel/vmcore_info.c | 8 +-- lib/test_printf.c | 26 -------- lib/vsprintf.c | 21 ------- mm/Kconfig | 10 +-- mm/debug.c | 31 ++++++--- mm/internal.h | 1 - mm/zsmalloc.c | 15 ++--- 13 files changed, 72 insertions(+), 137 deletions(-) -- 2.43.0
