On Wed, Jul 24, 2013 at 10:06:53AM -0700, Andy Lutomirski wrote: > > Hi Andy, if I understand you correctly "file-backed pages" are carried > > in pte with _PAGE_FILE bit set and the swap soft-dirty bit won't be > > used on them but _PAGE_SOFT_DIRTY will be set on write if only I've > > not missed something obvious (Pavel?). > > If I understand this stuff correctly, the vmscan code calls > try_to_unmap when it reclaims memory, which makes its way into > try_to_unmap_one, which clears the pte (and loses the soft-dirty bit). Indeed, I was so stareing into swap that forgot about files. I'll do a separate patch for that, thanks! -- 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>