Re: allocation failed: out of vmalloc space - use vmalloc= to increase size.

Daniel J Blueman
2007-06-12T17:01:18Z

On 12 Jun, 14:30, Jon Dufresne
<jon.dufresne@infinitevideocorporation.com> wrote:
> I am writing a linux kernel driver for a custom pci device. I am
> developing against the stock fedora 6 kernel on an x86. This device has
> 512 MB of IO memory reserved by BAR 3. Whenever I try to ioremap this
> space I get the error:
>
> allocation failed: out of vmalloc space - use vmalloc=<size> to increase
> size.
>
> I think I understand why this is happening. I obviously don't have
> enough vmalloc space to map such a large chunk of memory. I have been
> using Corbet's et el's "Linux Device Drivers", Love's "Linux Kernel
> Development", and many websites as a guide in this development process
> but have yet to come across information that will help me.
>
> I'm curious if there is a way around this issue. Or a better way of
> handling it so that I can properly map the entire io memory space.

You can boot with kernel parameter vmalloc=384M or so. I have
experienced problems with booting with other values, but YMMV.

Daniel

> Thanks for any help,
> Jon
--
Daniel J Blueman