Re: [PATCH 3/12 2.4] e1000 - use vmalloc for data structures not shared with h/w
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2004-07-31 07:39:40
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Christoph Hellwig [off-list ref] wrote:
On Thu, Jul 29, 2004 at 11:17:08AM -0700, Venkatesan, Ganesh wrote:quoted
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, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} [off-list ref] Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt