> Date: Tue, 10 Sep 2019 16:03:23 -0000 (UTC) > From: [email protected] (Christos Zoulas) > > In article <[email protected]>, > Taylor R Campbell <[email protected]> wrote: > >Can we just cache these when the file descriptor is opened with > >O_EXEC? > > > >The cache could become stale if the executable or any parent directory > >is moved or deleted. But they could become stale after exec too for > >the same reason. > > I guess we could, since the problem is that if the filename is greater than > NCHNAMLEN, they will not be cached. But I am not familiar enough with the > cache to make the changes required.
I don't mean using the vnode cache. I mean finding somewhere else to hang a cached copy of the executable and p_comm on the struct fdfile or something. Maybe a global table mapping fdfile pointer to cached stuff if we don't want to make the struct larger for non-O_EXEC fds.
