I have a fairly simple opengl application running on nouveau. It
effectively just plots a couple of very large images that change regularly.
I've been getting an easily repeatable failure, hitting the
BUG_ON(in_interrupt) in vfree() that is called during ttm_shrink_work().
Obviously vfree() is being called with a lock held...
Looking at the locking up through the stack trace, there's an obvious
mistake:
There should be a:
spin_lock(&glob->lru_lock);
before the continue in ttm_bo_swapout() in drivers/gpu/drm/ttm/ttm_bo.c
--- ttm_bo.c~ 2011-01-05 00:50:19.000000000 +0000
+++ ttm_bo.c 2011-01-20 18:11:57.262813765 +0000
@@ -1761,6 +1761,7 @@ static int ttm_bo_swapout(struct ttm_mem
spin_unlock(&glob->lru_lock);
(void) ttm_bo_cleanup_refs(bo, false, false,
false);
kref_put(&bo->list_kref, ttm_bo_release_list);
+ spin_lock(&glob->lru_lock);
continue;
}
That fixes the problem for me.
Matthew
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