Re: [PATCH v2 1/5] crypto: Multi-buffer encryptioin infrastructure support

From: Herbert Xu
Date: Wed Nov 18 2015 - 00:07:33 EST

On Tue, Nov 17, 2015 at 04:30:14PM -0800, Tim Chen wrote:
> On Wed, 2015-11-18 at 08:07 +0800, Herbert Xu wrote:
> > On Tue, Nov 17, 2015 at 02:59:29PM -0800, Tim Chen wrote:
> > >
> > > Herbert, would you prefer me to use ablkcipher scatter walk instead,
> > > assuming the overhead of both walk are about the same?
> >
> > Well since you are going to potentially sleep in the middle of
> > an operation I'd think ablkcipher is required, no?
> We're using blkcipher walk in the implementation.
> As long as we use kmap and instead of kmap_atomic,
> it allows us to sleep in the middle of the walk.

What if you were called from an atomic context, such as IPsec?

Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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