Excerpts from Miao Xie's message of 2010-11-17 20:18:18 -0500: > >> Right thats the idea, if we can't span chunks/stripes we should be doing that > >> limiting in our get_blocks call and that way we don't have to screw with the > >> generic direct io stuff too much. Thanks, > > > > In this case we're adding complexity to the O_DIRECT mapping code, when > > we really should be adding it to the btrfs submit bio hook. It can > > easily break up the bio into smaller units, which will leave us with a > > smaller number of get_blocks calls overall. > > > > I'm working that out now. > > Do you mean you are fixing this bug now? I started on it this afternoon, but lost network due to high winds here. So, I didn't make any real progress. If you'd like to fix this in the btrfs direct-io bio submit call you're welcome to continue working on it. The idea is to just clone and split up the bio, which will keep us from filling up fs/direct-io.c w/btrfs rules and allow us to take fewer trips into the get_blocks call. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
