On Wed, Apr 22, 2020 at 1:23 AM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote: > So I think 4 KB is indeed a reasonable quantum of work here. Only > PAGE_SIZE is not necessarily equal to 4 KB on arm64, so we should use > SZ_4K instead. Will wait to hear the rt guys' opinion, but sure, we can do SZ_4K explicitly. If we go with that in the end, v2 will adjust the other places that are already using PAGE_SIZE. > So do we have any callers that are likely to pass more than 4 KB of > input at a time? Network packets can be big -- ethernet jumbo packets are 9k, for example -- so that means this could potentially ipsec, wireguard, and maybe wifi too. (Crypto api users might go through another layer of indirection that splits things up smaller, maybe.)
