Re: 2.5.40+ futex broken with COW

Peter Wächtler <[email protected]> Wed, 09 Oct 2002 01:15:48 +0200

Newsgroups	gmane.linux.ngpt.devel,gmane.linux.kernel
Organization	B16
Message-ID	<[email protected]>

Peter WÃ¤chtler schrieb:
> 
> The COW changes break PROCESS_SHARED futexes in
> mmap( MAP_SHARED ).
> 
> I think that COW is unconditionally used on fork().
> But you need to check for MAP_SHARED, eh?
> 
> If wanted I can provide a testcase (that runs fine on
> 2.4.19+futex patch + NGPT and on Irix)

Argh, forget it. Made a silly mistake too painful to mention :)