On Wed, Jul 24, 2013 at 11:21:46AM -0700, Andy Lutomirski wrote: > > > > I fear for tracking soft-dirty-bit for swapped entries we sinply have > > no other place than pte (still i'm quite open for ideas, maybe there > > are a better way which I've missed). > > I know approximately nothing about how swap and anon_vma work. > > For files, sticking it in struct page seems potentially nicer, > although finding a free bit might be tough. (FWIW, I have plans to > free up a page flag on x86 some time moderately soon as part of a > completely unrelated project.) I think this stuff really belongs to > the address_space more than it belongs to the pte. Well, some part of information already lays in pte (such as 'file' bit, swap entries) so it looks natural i think to work on this level. but letme think if use page struct for that be more convenient... > > How do you handle the write syscall? I fear I somehow miss your point here, could please alaborate a bit? There is no additional code I know of being write() specific, just a code for #PF exceptions. -- 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>