Quoting Jason Ekstrand (2018-09-26 10:43:59) > On Wed, Sep 26, 2018 at 3:18 AM Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> 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 <jason@xxxxxxxxxxxxxx> > > Cc: stable@xxxxxxxxxxxxxxx > > --- > > 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. Patch works, the difference is insignificant, land the patch and close the bug. -Chris
