Re: [PATCH] parisc: check hardcoded value of SHMLBA against value reported by firmware

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 10/29/2013 10:26 PM, James Bottomley wrote:
> On Tue, 2013-10-29 at 22:05 +0100, Helge Deller wrote:
>> Our value of SHMLBA is hardcoded to 4MB on parisc due to aliasing restrictions
>> of the platform. The firmware function PDC_CACHE does return the machine
>> dependend value of this aliasing requirement.
>> So, if there is a difference between those two - which we don't expect - let's
>> report it at least.
> 
> We know that architecturally it's defined to be 16MB.  However, we also
> know from the chip architects that the greatest stride ever done or
> planned was 4MB, which is why we use it.  HPUX does the same, so there's
> not much point issuing a warning, because it's likely that IODC isn't
> setting up the values correctly and there's nothing a warning will
> achieve except worrying the users if they bother to read it.

Ok, thanks for this info.
I'll drop that patch.

Helge

--
To unsubscribe from this list: send the line "unsubscribe linux-parisc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux SoC]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux