Messages in this thread | | | Subject | Re: Main CPU- I/O CPU interaction | From | Alan Cox <> | Date | Tue, 04 Jan 2005 22:03:45 +0000 |
| |
On Llu, 2005-01-03 at 22:27, Valdis.Kletnieks@vt.edu wrote: > What sort of I/O device processor is (a) supported by Linux *and* (b) filesystem > aware? Unless it meets both criteria, the main CPU(s) will still have to do > all the work of block allocation, inode creation, and all the rest of that > stuff.
NetApp 8)
The offloading file system stuff has been proposed and kicked around and failed repeatedly in different circles. What has had some success is offloading layout so that the I/O device thinks in terms of
handle = allocate(blocks, near_this, and_this, ....) data = read(handle, offset, len) write(handle, offset, len, data) free(handle)
type API's, allowing the storage subsystem to do physical mirror/relocation/HSM in private.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |