| To: | hch@xxxxxxxxxxxxx (Christoph Hellwig) |
|---|---|
| Subject: | Re: [PATCH 3/12 2.4] e1000 - use vmalloc for data structures not shared with h/w |
| From: | Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> |
| Date: | Sat, 31 Jul 2004 17:38:11 +1000 |
| Cc: | ganesh.venkatesan@xxxxxxxxx, jgarzik@xxxxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx |
| In-reply-to: | <20040729192519.A6235@xxxxxxxxxxxxx> |
| Organization: | Core |
| Sender: | netdev-bounce@xxxxxxxxxxx |
| User-agent: | tin/1.7.4-20040225 ("Benbecula") (UNIX) (Linux/2.4.26-1-686-smp (i686)) |
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, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt |
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