On Tue, Jan 15, 2008 at 08:42:36PM -0800, Andrew Morton wrote: > On Wed, 16 Jan 2008 12:25:53 +0800 Fengguang Wu <[EMAIL PROTECTED]> wrote: > > > list_heads are OK if we use them for one and only function. > > Not really. They're inappropriate when you wish to remember your > position in the list while you dropped the lock (as we must do in > writeback). > > A data structure which permits us to interate across the search key rather > than across the actual storage locations is more appropriate.
I totally agree with you. What I mean is to first do the split of functions - into three: ordering, starvation prevention, and blockade waiting. Then to do better ordering by adopting radix tree(or rbtree if radix tree is not enough), and lastly get rid of the list_heads to avoid locking. Does it sound like a good path? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
