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>hi all..<br>>i have been working on char device driver.<br>>i need a good document on advance char device driver..?<br><br>> From: kernelnewbies-request@kernelnewbies.org<br>> Subject: Kernelnewbies Digest, Vol 5, Issue 20<br>> To: kernelnewbies@kernelnewbies.org<br>> Date: Thu, 14 Apr 2011 12:00:01 -0400<br>> <br>> Send Kernelnewbies mailing list submissions to<br>> kernelnewbies@kernelnewbies.org<br>> <br>> To subscribe or unsubscribe via the World Wide Web, visit<br>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies<br>> or, via email, send a message with subject or body 'help' to<br>> kernelnewbies-request@kernelnewbies.org<br>> <br>> You can reach the person managing the list at<br>> kernelnewbies-owner@kernelnewbies.org<br>> <br>> When replying, please edit your Subject line so it is more specific<br>> than "Re: Contents of Kernelnewbies digest..."<br>> <br>> <br>> Today's Topics:<br>> <br>> 1. Re: Missing 1GB RAM, where is it? (Andrzej Kardas)<br>> <br>> <br>> ----------------------------------------------------------------------<br>> <br>> Message: 1<br>> Date: Thu, 14 Apr 2011 17:43:05 +0200<br>> From: Andrzej Kardas <andrzej-kardas@o2.pl><br>> Subject: Re: Missing 1GB RAM, where is it?<br>> To: Adrian Cornish <adrianc@cqg.com><br>> Cc: kernelnewbies@kernelnewbies.org<br>> Message-ID: <4DA71609.5070800@o2.pl><br>> Content-Type: text/plain; charset="iso-8859-1"<br>> <br>> <br>> <br>> On 14.04.2011 17:09, Adrian Cornish wrote:<br>> > Just a thought - lower end graphic cards use system RAM as their own<br>> > dont they<br>> You right, devices like graphic card, ethernet cards etc. are mapped <br>> into memory, what cause some amount RAM is not available for system use. <br>> But as i've wrote before, i'm wondering why addresses in /proc/iomem <br>> (where the map of memory is) are not contiguous. I think, there should <br>> be info about what region of memory is mapped where (BIOS, PCI bus, for <br>> system use etc)*for whole 4GB *(Am I right??) address space (for 32bit <br>> OS). Instead of that, there are small "holes" in addresses and the total <br>> size of this holes (in my case) is about 400MB. So i wonder where that <br>> memory is.<br>> -------------- next part --------------<br>> An HTML attachment was scrubbed...<br>> URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110414/c0b6b2f7/attachment-0001.html <br>> <br>> ------------------------------<br>> <br>> _______________________________________________<br>> Kernelnewbies mailing list<br>> Kernelnewbies@kernelnewbies.org<br>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies<br>> <br>> <br>> End of Kernelnewbies Digest, Vol 5, Issue 20<br>> ********************************************<br> </body>
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