BOUNCE rtl@rtlinux.org: Approval required: Non-member submissionfrom ["Basham, Richard R" <Richard.Basham@PSS.Boeing.com>] (fwd)

[Der Herr Hofrat <der.herr@hofr.at>]

>From owner-rtl Thu May 17 19:04:55 2001
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From: "Basham, Richard R" <Richard.Basham@PSS.Boeing.com>
To: "'rtl@fsmlabs.com'" <rtl@fsmlabs.com>
Cc: Patrick VIGOT <pvigot@garbarini.com>
Subject: RE: [rtl] Shared memory with Lilo and __va()
Date: Thu, 17 May 2001 17:59:59 -0700
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Unless you need to have dma access to the memory it is a whole lot easier to use mbuff.  It comes packaged with RTL and there are examples of how to use it.

-----Original Message-----
From: Marc LE DOUARAIN [mailto:mledouarain@garbarini.com]
Sent: Thursday, May 17, 2001 9:02 AM
To: rtl@fsmlabs.com
Cc: Patrick VIGOT
Subject: [rtl] Shared memory with Lilo and __va()


Hello,

I've tried sharing memory on RTLinux as explained in the Shared Memory HOWTO :

I've 64Megs RAM on the computer...
With Lilo, I set to use only 31m with append="mem=31m"

I do the following define :
#define ADDRESS (31*0x100000)

In the real-time module , I have the following :
my_structure * Params = ADDRESS;

And when I insmod the real-time module, I get the following error :
"Unable to handle kernel paging request"

Any idea?


I've tried the same code on another computer (128Megs RAM) using also 31m with Lilo, and all is working perfectly...

I've tried on the first computer with incorrect #define ADDRESS (5*0x100000), strange, I've no more the error, but datas seems not to be shared...

Many Thanks.

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