wrong data in remapped buffer

[John Baldwin]

On Tuesday 10 March 2009 6:16:27 am Alexej Sokolov wrote:
> 2009/3/9 John Baldwin <jhb at freebsd.org>
> 
> > On Monday 09 March 2009 3:38:55 pm Alexej Sokolov wrote:
> > > 2009/3/9 John Baldwin <jhb at freebsd.org>
> > >
> > > > On Friday 06 March 2009 11:13:38 am Alexej Sokolov wrote:
> > > > > Hello,
> > > > > I try to MALLOC a buffer in kern, then remap it with vm_map_find(),
> > to
> > > > space
> > > > > of user process.
> > > > > Some times the remapped buffer in user space contain incorrect data.
> > > >
> > > > What architecture are you using?  On some archs like amd64, small
> > mallocs
> > > > (<=
> > > > PAGE_SIZE) don't use the kmem_map or kmem_object.
> > > >
> > > > --
> > > > John Baldwin
> > > >
> > > anyway , the error happens only some times... I think there is other
> > reason.
> > > My hardware is amd64
> > > % uname -ms
> > > FreeBSD i386
> >
> > i386 always uses kmem for malloc(9).
> >
> > --
> > John Baldwin
> 
> ok,
> and what should be a reason of  inconsistent data after remapping ?

I don't know off the top of my head.  I'm not really sure your use of 
vm_map_find() is correct, but I don't know it well enough to comment further.

-- 
John Baldwin