Re: [Qemu-devel] Heads up: glibc preadv emulation breaks qemu on older kernels

[Avi Kivity]

On 02/16/2010 12:16 AM, Christoph Hellwig wrote:
> On Fri, Feb 12, 2010 at 11:28:57AM -0600, Anthony Liguori wrote:
>    
> > > Yes.  The BSDs tend to not play stupid emulation games in the libc, so
> > > changes of these kinds of messups to happen are far less.
> > >
> > >        
> > In all fairness, I seem to recall there being a problem with the kernel
> > implementation of preadv/pwritev too.
> >      
> I would be surprised by that as it's just an entirely trivial entry
> point to long existant infrastructure.  I even checked the commit logs
> and that code hasn't been touched at all since the initial commit.
> So if people have problems with it, please report it..
>    

IIRC there was a problem with wiring up glibc to use p*v on i386.  The 
large number and size of the arguments caused some confusion wrt the 
calling convention, or something.   So it's only fair that glibc 
emulation of the syscall would be broken too.

--
error compiling committee.c: too many arguments to function