On Fri, Apr 09, 2021 at 07:50:46PM +0100, Matthew Wilcox (Oracle) wrote: > These new functions are the folio analogues of the PageFlags functions. > If CONFIG_DEBUG_VM_PGFLAGS is enabled, we check the folio is not a tail > page at every invocation. Note that this will also catch the PagePoisoned > case as a poisoned page has every bit set, which would include PageTail. > > This saves 1727 bytes of text with the distro-derived config that > I'm testing due to removing a double call to compound_head() in > PageSwapCache(). I vote for dropping the Camels if we're going to rework all this.
