r255873: ahcich7: Timeout on slot 0 port 0 FLOODING kernel messages

[O. Hartmann]

On Fri, 27 Sep 2013 05:57:01 -0600
Scott Long <scottl at samsco.org> wrote:

> 
> On Sep 27, 2013, at 5:52 AM, Sergey V. Dyatko
> <sergey.dyatko at gmail.com> wrote:
> 
> >>> 
> >>> yes, these messages disappeared after revert 255870 and r255871
> >>> 
> >> 
> >> 
> >> Hi,
> >> 
> >> Nothing that I changes should have affected the ahci driver.  In
> >> fact, I tested this driver specifically during my development.  Can
> >> you confirm that you built both kernel and modules from a clean
> >> state?
> > 
> > [tiger at laptop]:/usr/src%svn st
> > M       sys/boot/i386/zfsboot/zfsboot.c
> > [tiger at laptop]:/usr/src%svn diff 
> > Index: sys/boot/i386/zfsboot/zfsboot.c
> > ===================================================================
> > --- sys/boot/i386/zfsboot/zfsboot.c     (revision 255873)
> > +++ sys/boot/i386/zfsboot/zfsboot.c     (working copy)
> > @@ -302,6 +302,7 @@
> >      * region in the SMAP, use the last 3MB of 'extended' memory as
> > a
> >      * high heap candidate.
> >      */
> > +       high_heap_size = 0;
> >     if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) {
> >        high_heap_size = HEAP_MIN;
> >        high_heap_base = bios_extmem + 0x100000 - HEAP_MIN;
> > [tiger at laptop]:/usr/src%
> > 
> > nothing more. 
> > 
> 
> Yes, no local source changes, but are you loading the cam or ahci
> drivers a loadable modules that might be out of sync now, or did you
> use a short- cut for building your kernel, like NO_CLEAN?
> 
> Thanks,
> Scott
> 
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In my case, as the initiator of the thread, I perform ALWAYS a complete
delete of /usr/obj/ and start building the system from scratch.

The codebase is "vanilla" CURRENT - means without local changes or
additions.

In my case, AHCI driver and CAM are built-in.

I also realise that only more "modern" systems seem to get affected.
The box in question is a LGA1155/Z77 system with an additional SATA 6GB
controller, which I susepct "owning" the ahaci channel7.

The P45-based boxes with the same CURRENT do not expose this phenomenon.

Oliver
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