On Tue, May 18, 2010 at 10:56:24AM -0500, Christoph Lameter wrote: > On Wed, 19 May 2010, Nick Piggin wrote: > > > What would be needed is to have filesystem maintainers go through and > > enable it on a case by case basis. It's trivial for tmpfs/ramfs type > > filesystems and I have a patch for those, but I never posted it on.yet. > > Even basic buffer head filesystems IIRC get a little more complex -- > > but we may get some milage just out of invalidating the existing > > pagecache rather than getting fancy and trying to move buffers over > > to the new page. > > There is a "migration" address space operation for moving pages. Page > migration requires that in order to be able to move dirty pages. Can > splice use that? Hmm yes I didn't think of that, it probably could. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>