List I am working on enabling Highmem support and 64 Bit support 1. 64 Bit support As Ralf suggested I have tried enabling 64 bit support. I have reached up to a point where I can boot the kernel with 512MB memory (logs attached). How ever if I increase mem above > 512 I am not even getting single print from kernel. I am blocked at this point. I will appreciate if any body can point me to a most likely issue that I am hitting. BTW I am running kernel 2.6.18 2. Highmem I have tried enabling highmem. And I could boot till mounting root file system. I have tried mounting RFS from a usb disk as well as NFS mount. Both the cases fails (attaching logs). Let me know if you guys need any further info for giving me some pointers Regards Anoop -----Original Message----- From: Ralf Baechle [mailto:ralf@xxxxxxxxxxxxxx] Sent: Monday, December 14, 2009 11:05 PM To: Anoop P.A. Cc: linux-mips@xxxxxxxxxxxxxx Subject: Re: Help in enabling HIGHMEM support On Mon, Dec 14, 2009 at 05:34:13AM -0800, Anoop P.A. wrote: > We have a requirement to use a bigger RAM (1 GB / 2GB) with a RM9000 > based SOC. I thought of going with HIGHMEM path rather than enabling > 64bit support thinking it will be easier. This sounds like sawing off 32 legs just to be able to make use of a free [1] wheelchair. > I have tried enabling HIGMEM in kernel. Board boots fine with a 512 MB > RAM plugged in. But if I connect a 1 GB RAM kernel will not boot. I am > not even getting single print from kernel. I am using linux-2.6.18 > kernel. > > It will be great if get any pointers suggestions in debugging this? With this amount of RAM, use a 64-bit kernel if you can. You'll be happy not to know about all the headaches you will never encounter. Ralf [1] Conditions apply.
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highmem-squashfs.doc
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