Hello Ming Lu<br><br><div><span class="gmail_quote">On 10/20/06, <b class="gmail_sendername">Ming Liu</b> <<a href="mailto:eemingliu@hotmail.com">eemingliu@hotmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Dear all,<br>My situation is, I want to reserve some amount of memory and make it shared<br>by both Linux kernel and another hardware peripheral. That is, when I boot<br>linux and execute some user space programs, this part of memory should be
<br>reserved for other use and cannot be used by both the kernel and those<br>applications. </blockquote><div><br>
Considering your setup as normal desktop, I hope this can be done by
giving "mem= xxm" as the boot arguments. Say the dmesg in
your system shows " 495MB LOWMEM available." .
In the boot arguments you can give mem=490m saying the linux to use
only 490MB . The rest 5MB can be used later as you wish.<br>
<br>
Please correct if i am wrong. <br>
<br>
Thanks<br>
Sudheer<br>
<br>
</div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">But it could be accessed by Linux with some certain kind of<br>application and also be accessed by another hardware peripheral with DMA or
<br>something like that.<br><br>I am not sure if I am right but I think it's just like the situation of<br>multiprocessing (if we can treat that hardware peripheral as another<br>processor, or just use another processor to realize its functions.) and
<br>that part of memory is just like the hardware shared memory by<br>multiprocessor. Am I right?<br><br>Then my question is, how to reserve such part of memory in Linux? Does<br>Linux has such a function?<br><br>I am not falimiar with such a topic, so any hint related to this is
<br>appreciated.<br><br>Thanks for your ideals and suggestions.<br><br>Regards<br>Ming<br><br>_________________________________________________________________<br>与联机的朋友进行交流，请使用 MSN Messenger: <a href="http://messenger.msn.com/cn">
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