| To: | herbert@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | Re: [RFC] Replace scatterlist with crypto_frag |
| From: | "David S. Miller" <davem@xxxxxxxxxxxxx> |
| Date: | Mon, 06 Jun 2005 15:36:02 -0700 (PDT) |
| Cc: | johnpol@xxxxxxxxxxx, jmorris@xxxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx |
| In-reply-to: | <20050604103249.GA1378@gondor.apana.org.au> |
| References: | <20050604102204.GA1214@gondor.apana.org.au> <20050604142939.4e2efc55@zanzibar.2ka.mipt.ru> <20050604103249.GA1378@gondor.apana.org.au> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Date: Sat, 4 Jun 2005 20:32:49 +1000 > On Sat, Jun 04, 2005 at 02:29:39PM +0400, Evgeniy Polyakov wrote: > > > > But without sg we sill save 4*sizeof(dma addr) - is it really a price? > > We're also reducing the offset/length to 16 bits from 32 bits so we're > shaving off half the size. Note, it is still going to be a 16 byte structure on 64-bit machines. This is mainly due to the 8-byte alignment needed by the page pointer. I'm not objecting to your ideas, just mentioning this fact... I am also puzzled as to where the "4" came from :-) |
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