On Thu, Jan 12, 2006 at 11:08:33PM -0600, Mike Christie wrote: > >From FUJITA Tomonori <tomof@xxxxxxx>: > > Users can write to a page while we are sending it and making > digest calculations. This ends up causing us to retry the command > when a digest error is later reported. By using sock_no_sendpage > when data digests are calculated we can avoid a lot of (not all but it > helps) the retries becuase sock_no_sendpage is not zero copy. This sounds like it'd kill performance badly when using data digests. But using lock_page from an LLDD sounds pretty bad aswell, so I don't know anything better. - : 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
