On Thu, Dec 15, 2016 at 10:59:10AM +0200, Joonas Lahtinen wrote:
> On ma, 2016-12-12 at 11:53 +0000, Chris Wilson wrote:
> > Check that we can request alignment to any power-of-two or prime using a
> > plain drm_mm_node_insert(), and also handle a reasonable selection of
> > primes.
> >
> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
>
> <SNIP>
>
> > +static int igt_align(void *ignored)
> > +{
> > + struct drm_mm mm;
> > + struct drm_mm_node *node, *next;
> > + int ret = -EINVAL;
> > + int prime;
> > +
> > + drm_mm_init(&mm, 1, U64_MAX - 1);
> > +
> > + drm_for_each_prime(prime, 8192) {
> > + u64 size;
> > + int err;
> > +
> > + node = kzalloc(sizeof(*node), GFP_KERNEL);
> > + if (!node) {
> > + ret = -ENOMEM;
> > + goto out;
> > + }
>
> If the amount of primes would be predictable (pun intended), we could
> malloc the nodes at one go.
I think I'll keep a couple of these smaller kzalloc() sites, just to
have some variety in testing. In particular, this coupled with kmemleak
(or slab debug) could catch a leak other tests might miss.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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