The linux kernel 2.4.20 seems to have problems with
vmalloc. Here is what I did:
In my driver, I try to allocate a buffer of size 512K
using vmalloc ( kmalloc cannot allocate more than
128K). It generates a kernel oops message saying that
the virtual memory cannot be allocated.
I suspect there is a problem with the address range
defined for vmalloc namely by VMALLOC_START and
VMALLOC_END.
Any thoughts of what might be going-on ?
Please do let me know if you want to look at the
kernel oops message.
Thanks,
Sandeep
sandeepu@us.ibm.com
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The linux kernel 2.4.20 seems to have problems with
vmalloc. Here is what I did:
In my driver, I try to allocate a buffer of size 512K
using vmalloc ( kmalloc cannot allocate more than
128K). It generates a kernel oops message saying that
the virtual memory cannot be allocated.
I suspect there is a problem with the address range
defined for vmalloc namely by VMALLOC_START and
VMALLOC_END.
Any thoughts of what might be going-on ?
Not really. But why don't you just call alloc_pages instead?
M.
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On Sat, Feb 08, 2003 at 08:39:37PM -0800, sandeep uttamchandani wrote:
The linux kernel 2.4.20 seems to have problems with
vmalloc. Here is what I did:
In my driver, I try to allocate a buffer of size 512K
using vmalloc ( kmalloc cannot allocate more than
128K). It generates a kernel oops message saying that
the virtual memory cannot be allocated.
Thanks,
Sandeep
---end quoted text---
Hi Sandeep,
I'm running a stock 2.4.20 kernel and put together a little test module that
allocates 512k memory with vmalloc. I have no problems on an Intel X86. I
also ran it allocating 1MByte as well.
cheers,
Karen
--
Karen Shaeffer
Neuralscape, Palo Alto, Ca. 94306
shaeffer@neuralscape.com http://www.neuralscape.com
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