Re: [RFC PATCH 23/28] algif: Remove hash_sendpage*()

[David Howells]

Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:

> > I must be missing something, I think.  What's particularly optimal about the
> > code in hash_sendpage() but not hash_sendmsg()?  Is it that the former uses
> > finup/digest, but the latter ony does update+final?
> 
> A lot of hardware hashes can't perform partial updates, so they
> will always fall back to software unless you use finup/digest.

Okay.  Btw, how much of a hard limit is ALG_MAX_PAGES?  Multipage folios can
exceed the current limit (16 pages, 64K) in size.  Is it just to prevent too
much memory being pinned at once?

David