Re: Terminate process that fails on a constrained allocation

From: Andrew Morton
Date: Wed Feb 08 2006 - 18:42:13 EST

Christoph Lameter <clameter@xxxxxxxxxxxx> wrote:
> On Wed, 8 Feb 2006, Andrew Morton wrote:
> > > I think it should be put into 2.6.16. Andrew?
> >
> > Does every single caller of __alloc_pages(__GFP_FS) correctly handle a NULL
> > return? I doubt it, in which case this patch will cause oopses and hangs.
> If a caller cannot handle NULL then __GFP_NOFAIL has to be set, right?

That would assume non-buggy code. I'm talking about the exercising of
hitherto-unused codepaths. We've fixed many, many pieces of code which
simply assumed that kmalloc(GFP_KERNEL) succeeds. I doubt if many such
simple bugs still exist, but there will be more subtle ones in there.

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