On Mon, 16 Feb 2009 11:19:21 +0200 Boaz Harrosh <bharrosh@xxxxxxxxxxx> wrote: > >> Also looking > >> ahead I will have RAID 0, 1, 5, and 6 on objects of different devices. bio > >> is the perfect collector for memory information in this situation. > > > > You will add such features to exofs, handling multiple devices > > internally? > > > > Multiple objects on Multiple devices, Yes. I thought that exofs is kinda example (reference) file system. Nobody has seen your code. Let's discuss when we have the code. Over-designing for what we've not seen is not a good idea. > >> exofs is not the first and only file system who is using bios. Proof of > >> the matter is that block exports a bio submit routine. > > > > Seems that exofs just passes pages and the ULD sends a SCSI command > > including these pages. I don't see how exofs needs to handle bio > > directly. > > > > How do you propose to collect these pages? and keep them without allocating > an extra list? without pre-allocating a struct request? and without re-inventing > the bio structure? I don't think that allocating an extra list (or something) to keep them hurts performance. We can talk about it when you have the real performance results. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
