On Fri, Jul 26, 2013 at 1:18 PM, Cyrill Gorcunov <gorcu...@gmail.com> wrote: > Andy reported that if file page get reclaimed we loose soft-dirty bit > if it was there, so save _PAGE_BIT_SOFT_DIRTY bit when page address > get encoded into pte entry. Thus when #pf happens on such non-present > pte we can restore it back. >
Unless I'm misunderstanding this, it's saving the bit in the non-present PTE. This sounds wrong -- what happens if the entire pmd (or whatever the next level is called) gets zapped? (Also, what happens if you unmap a file and map a different file there?) --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
