Re: Allocation of kernel memory >128K

[ebiederm@xmission.com (Eric W. Biederman)]

"Amit S. Jain" <amitjain@tifr.res.in> writes:

> I have been working on a module in which I copy large amount of data fromn
> the user to the kernel area.To do so I allocate using either kmaaloc or
> vmalloc or  get_free_pages()large amount of memory(in the range of
> MBytes) in the kernel space.However this attempt is not successful.One ofmy 
> colleagues informed me that in the kernel space it is safe not to allocate
> large amount of memory at one time,should be kept upto 30K...is he
> right....could you throw more light on this issue.

large amounts of memory are o.k. 
large amounts of continuous memory is generally a bad thing.

Allocating everything with multiple calls to get_free_page() should
get the job done.

Eric
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