On Mon 2023-01-30 13:25:13, Hyeonggon Yoo wrote: > %pGp format is used to display 'flags' field of a struct page. > However, some page flags (i.e. PG_buddy, see page-flags.h for more details) > are stored in page_type field. To display human-readable output of > page_type, introduce %pGt format. > > It is important to note the meaning of bits are different in page_type. > if page_type is 0xffffffff, no flags are set. Setting PG_buddy (0x00000080) > flag results in a page_type of 0xffffff7f. Clearing a bit actually means > setting a flag. Bits in page_type are inverted when displaying type names. > > Only values for which page_type_has_type() returns true are considered > as page_type, to avoid confusion with mapcount values. if it returns false, > only raw values are displayed and not page type names. > > Signed-off-by: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx> Reviewed-by: Petr Mladek <pmladek@xxxxxxxx> # for vsprintf part I am sorry for the late review. It has somehow fallen through cracks. Best Regards, Petr
