On 11/11/2015 11:34 AM, Hannes Reinecke wrote: > Hi all, > > having been subjected to the pain of trying to bootstrap a really > large machine with systemd I decided to implement LUN masking in > scsi_transport_fc. > The principle is simple: disallow the automated LUN scanning when > discovering a rport, and create udev rules which selectively > enable individual LUNs by echoing the relevant values in the 'scan' > attribute of the SCSI host. > With that I'm able to boot an arbitrary large machine without > running into any udev or systemd imposed timeout. > To _disable_ LUN masking and restoring the original behaviour > I've noticed that the 'scan' sysfs attribute is actually synchronous, > ie the calling process will be blocked until the entire LUN scan > is completed. > So I've added another module parameter 'async_user_scan' to > move the scanning onto the existing scan workqueue, and unblock > the calling process. > > As usual, comments and reviews are welcome. > > Hannes Reinecke (2): > scsi_transport_fc: implement 'disable_target_scan' module parameter > scsi_transport_fc: Implement 'async_user_scan' module parameter > > drivers/scsi/scsi_transport_fc.c | 47 +++++++++++++++++++++++++++++++++++++--- > 1 file changed, 44 insertions(+), 3 deletions(-) > Hmm. this seemed to have fallen through -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg) -- 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
