Re: [PATCH 3/12 2.4] e1000 - use vmalloc for data structures not shared with h/w

[Herbert Xu]

Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Thu, Jul 29, 2004 at 11:17:08AM -0700, Venkatesan, Ganesh wrote:
>> Vmalloc space is less scarce than kmalloc space. Am I right? This patch
>> trades kmalloc space for vmalloc space.
> 
> No, it's not.  vmalloc needs virtual space that's rather limited (e.g. 64MB
> on PAE x86) in addition to physical memory.  Unless you do really big
> allocations stay away from vmalloc.

How big is really big? 64K? 256K? 1M?

Thanks,
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