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    SubjectRe: [PATCH] dynamic addition of virtual disks on PPC64 iSeries
    On Mon, 24 May 2004 00:23:28 -0700 Dave Hansen <haveblue@us.ibm.com> wrote:
    >
    > On Mon, 2004-05-24 at 00:05, Stephen Rothwell wrote:
    > > On Sun, 23 May 2004 23:29:20 -0700 Andrew Morton <akpm@osdl.org> wrote:
    > > > Or to generate a hotplug event when a disk is added? Even if there's no
    > > > notification to the kernel, it should be possible to generate the hotplug
    > > > events in response to a /proc-based trigger.
    > >
    > > I guess that would be possible. In this case I am trying to do the
    > > minimum change.
    >
    > I think this would be a worthy change. It's the same kind of thing that
    > we're planning for memory hotplug on ppc64: initiate a probe in /sys
    > somewhere, and get a few hotplug events in short order. The only
    > difference is that we'll probably require a write for the probe to
    > trigger. You don't want a 'grep -r foo /sys' to cause probes, do you?

    OK, I am convinced. :-) Now to learn about hotplug. :-(

    > > + printk(VIOD_KERN_INFO "disk %d: %lu sectors (%lu MB) "
    > > + "CHS=%d/%d/%d sector size %d%s\n",
    > > + dev_no, (unsigned long)(d->size >> 9),
    > > + (unsigned long)(d->size >> 20),
    > > + (int)d->cylinders, (int)d->tracks,
    > > + (int)d->sectors, (int)d->bytes_per_sector,
    > > + d->read_only ? " (RO)" : "");
    > > +
    >
    > Isn't it a little naughty to be spitting out so many values in a /sys
    > file?

    Thats not the sys file ...

    --
    Cheers,
    Stephen Rothwell sfr@canb.auug.org.au
    http://www.canb.auug.org.au/~sfr/
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