On Fri, Apr 11, 2014 at 2:42 PM, David Herrmann <dh.herrmann at gmail.com> wrote: > Hi > > On Fri, Apr 11, 2014 at 11:36 PM, Andy Lutomirski <luto at amacapital.net> > wrote: >> A quick grep of the kernel tree finds exactly zero code paths >> incrementing i_mmap_writable outside of mmap and fork. >> >> Or do you mean a different kind of write ref? What am I missing here? > > Sorry, I meant i_writecount.
I bet this is missing from lots of places. For example, I can't find any write_access stuff in the rdma code. I suspect that the VM_DENYWRITE code is just generally racy. --Andy
