[9fans] iounit and msize

[cinap_lenrek]

why is devmnt using msize-IOHDRSZ to split up reads and writes instead
of the iounit of the channel?

mntrdwr():
        ...
                nr = n;
                if(nr > m->msize-IOHDRSZ)
                        nr = m->msize-IOHDRSZ;
                r->request.count = nr;

--
cinap