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List:       linux-kernel
Subject:    Re: [PATCH] unified SysV and Posix mqueues as FS
From:       Alexander Viro <viro () math ! psu ! edu>
Date:       2002-10-28 1:54:00
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On Sun, 27 Oct 2002, Peter Waechtler wrote:

> Alexander Viro schrieb:
> > 
> > On Sun, 27 Oct 2002, Peter Waechtler wrote:
> > 
> > > I applied the patch from Jakub against 2.5.44
> > > There are still open issues but it's important to get this in before
> > > feature freeze.
> > >
> > > While you can implement Posix mqueues in userland (Irix is doing this
> > > with fcntl(fd,F_SETLKW,) and shmem) a kernel implementation has some advantages:
> > 
> > *thud*
> > 
> > ioctls on _directories_, of all things?
> 
> Parden? Where are directories used?
> create a file, give it a size, mmap it and serialize access to it with locks.
> That's all.

Check your file_operations for root directory.

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