Hi Pete,
On Mon, Jul 22, 2002 at 04:48:56PM -0400, Pete Zaitcev wrote:
> > From: Kurt Garloff <garloff@suse.de>
>
> > > For those who do not follow, John Cagle allocated 8 more SCSI
> > > disk majors.
> >
> > Have those officially been assigned to SCSI disks?
> > So disks 128 -- 255 have majors 128 thr. 135?
>
> I do not understand what your problem is. Do you refuse to recognise
> John as the LANANA chair or something?
Strange. I was just asking. Why would you think I would be silly and
refuse to recognize somebody?
> My patch is done in accordance with this:
> http://www.lanana.org/docs/device-list/devices.txt
OK, I should have checked there before asking here, probably.
> > SCSI disks connected. The patch does support up to 160 SD majors,
> > though currently, it won't succeed getting more than 132 majors.
>
> That's wonderful, but we cannot ship that. There is no userland
> support to create device nodes in dynamic fashion and to ensure
> that they do not conflict.
There will be.
> This is why Arjan filed for and received
> additional majors. Dynamic solutions need some time to float about
> the community, I think.
I don't object to having some more static ones. Fewer users will need
userspace tools for handling the dev nodes then ;-)
And of course, I'll adapt my patch to grab the assigned ones before
the unknown ones ...
> BTW, DASD does the same thing already. I never saw any memo or document
> explaining how to use this capability properly. Perhaps SuSE people
> support it. Kurt, can you tell anything about it?
I don't know much about DASD. They allocate block majors dynamically
starting from 255 backwards as far as I know. So, dev nodes need to
be created dynamically, I guess.
> > Do you have any idea why we can't just sync all mounted filesystems
> > in do_emergency_sync()?
> > DASD? LVM? EVMS? MD? Loop? NBD? DRBD? What's the rationale
> > of restricting the sync to only IDE and SCSI? Deadlock avoidance?
>
> I suspect it is a deadlock prevention thing, too. I cannot say if
> it ever worked satisfactory... :)
Well, Alt-SysRq-S does work; but it obviously misses to sync a number
of filesystems.
> > I'm gonna post my patches tomorrow ...
>
> Thanks, that's interesting. Like I said, they are not likely to
> get to the distro soon, but I'd love to look at them.
Well, I would be astonished if you adopted before we do ;-)
Regards,
-- Kurt Garloff <garloff@suse.de> Eindhoven, NL GPG key: See mail header, key servers Linux kernel development SuSE Linux AG, Nuernberg, DE SCSI, Security
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