On Wed, Sep 26, 2018 at 3:18 AM Chris Wilson <[email protected]> wrote:
> Quoting Jason Ekstrand (2018-09-26 08:17:03) > > We attempt to get fences earlier in the hopes that everything will > > already have fences and no callbacks will be needed. If we do succeed > > in getting a fence, getting one a second time will result in a duplicate > > ref with no unref. This is causing memory leaks in Vulkan applications > > that create a lot of fences; playing for a few hours can, apparently, > > bring down the system. > > > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107899 > > Signed-off-by: Jason Ekstrand <[email protected]> > > Cc: [email protected] > > --- > > drivers/gpu/drm/drm_syncobj.c | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/drivers/gpu/drm/drm_syncobj.c > b/drivers/gpu/drm/drm_syncobj.c > > index adb3cb27d31e..759278fef35a 100644 > > --- a/drivers/gpu/drm/drm_syncobj.c > > +++ b/drivers/gpu/drm/drm_syncobj.c > > @@ -97,6 +97,8 @@ static int > drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj, > > { > > int ret; > > > > + WARN_ON(*fence); > > I would have just put if (*fence) return; since the function is tied to > the array_wait implementation. > I considered doing that but marginally liked this better. If you have a preference, I'm happy to change itl. --Jason > Reviewed-by: Chris Wilson <[email protected]> > -Chris >
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