Re: kernel BUGs when removing largish files with the SLOB allocator

[Matt Mackall <mpm@selenic.com>]

On Tue, Sep 12, 2006 at 10:02:44PM +0100, David Howells wrote:
> Matt Mackall <mpm@selenic.com> wrote:
> 
> > Not sure yet. There's only one user in nommu.c that shouldn't just be
> > changed to ksize() that I can see, and that's the one in
> > show_process_blocks(). That could test for VM_MAPPED_COPY and keep its
> > hands off otherwise. 
> 
> Hmmm...  You're right.  However, note binfmt_elf_fdpic().  This calls ksize()
> but should really call kobjsize().  It should not assume that the allocation
> it's been given is of any particular type. 

I presume you mean load_elf_fdpic_binary, which is doing:

        fullsize = ksize((char *) current->mm->start_brk);

That's a little troubling.

> IIRC ksize() changed purpose at some point.

Uh, nope. ksize doesn't even exist in 2.4 and has always done the same
thing in 2.6.

-- 
Mathematics is the supreme nostalgia of our time.