On Tue, 2017-02-28 at 14:25 -0800, Andy Lutomirski wrote: > On Tue, Feb 28, 2017 at 1:47 PM, Eric Dumazet <eric.duma...@gmail.com> wrote: > > On Tue, 2017-02-28 at 13:09 -0800, Andy Lutomirski wrote: > > > >> Does this mean that a user program that does a zerocopy send can cause > >> a retransmitted segment to contain different data than the original > >> segment? If so, is that okay? > > > > Same remark applies to sendfile() already > > True. > > >, or other zero copy modes > > (vmsplice() + splice() ) > > I hate vmsplice(). I thought I remembered it being essentially > disabled at some point due to security problems.
Right, zero copy is hard ;) vmsplice() is not disabled in current kernels, unless I missed something.
