On Mon, Oct 25, 2010 at 05:49:11PM +0100, David Laight wrote:
> > No, since in general the file is also being extended (certainly in
> > this case it is) it also has to lock the file size, and that's going
> > to deny stat() until it's done.
>
> A stat request during a write can safely return
On Sun, Oct 24, 2010 at 10:56:40PM +, David Holland wrote:
> >
> > I think write() only needs to lock the the file enough to ensure that
> > the file offset is correct.
>
> No, since in general the file is also being extended (certainly in
> this case it is) it also has to lock the file si
(adding tech-kern because this seems likely to become lengthy; if
following up please drop source-changes-d)
On Sun, Oct 24, 2010 at 11:30:43AM +0100, David Laight wrote:
> > > [mmap mode disabled in cp due to long vnode lock waits]
> >
> > Because individual write() calls are supposed to be at
