tree 77b7b5c2672a902ad70db1dfae9fe10f4922657f
parent 98917cf0d6eda01e8c3c34d35398d46b247b6fd3
author Arjun Roy <arjunroy@google.com> 1606949626 -0800
committer Jakub Kicinski <kuba@kernel.org> 1607118053 -0800

net-zerocopy: Fast return if inq < PAGE_SIZE

Sometimes, we may call tcp receive zerocopy when inq is 0,
or inq < PAGE_SIZE, in which case we cannot remap pages. In this case,
simply return the appropriate hint for regular copying without taking
mmap_sem.

Signed-off-by: Arjun Roy <arjunroy@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>