From: Helge Deller <deller@gmx.de>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: linux-parisc@vger.kernel.org
Subject: Re: [PATCH] parisc: check hardcoded value of SHMLBA against value reported by firmware
Date: Tue, 29 Oct 2013 22:28:29 +0100 [thread overview]
Message-ID: <5270287D.2030308@gmx.de> (raw)
In-Reply-To: <1383081984.2071.34.camel@dabdike.int.hansenpartnership.com>
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
prev parent reply other threads:[~2013-10-29 21:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-29 21:05 [PATCH] parisc: check hardcoded value of SHMLBA against value reported by firmware Helge Deller
2013-10-29 21:10 ` John David Anglin
2013-10-29 21:11 ` Helge Deller
2013-10-29 21:26 ` James Bottomley
2013-10-29 21:28 ` Helge Deller [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5270287D.2030308@gmx.de \
--to=deller@gmx.de \
--cc=James.Bottomley@HansenPartnership.com \
--cc=linux-parisc@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.