On 02/28/2014 08:01 AM, Ren Mingxin wrote: > Hi, Hannes: > > On 10/23/2013 04:51 PM, Hannes Reinecke wrote: >> This patchs adds an 'eh_deadline' sysfs attribute to the scsi >> host which limits the overall runtime of the SCSI EH. > > As you known, adding to scsi host means such interface has also been > added to the SATA and USB controllers. But to users, I think it is > possible that there are 3 confusing points below: > > 1) There should not be this sysfs interface for SATA controllers, for > such interface will not work under SATA's own EH policy; > 2) There should not be this sysfs interface for USB controllers, > because probably they will not consider EH recovery to USB ones; > 3) They are not willing to affect SATA/USB controllers(even if their > sysfs interfaces) while setting global interafce by assigning scsi > module parameter. > > I was thinking how to mask SATA/USB controllers, but havn't a perfect > solution so far, for it seems that it is not clever enough to mask > them in each controller driver. Do you have any idea about above? > Yes, I have. I've send a patchset titled 'Display EVPD pages in sysfs', which introduces the ability to mask individual (device) attributes. The same mechanism can easily be used for host attributes. James B indicated that those patches might be okay for inclusion, but so far nothing has happened with them. I'll ping him again. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (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
