Messages in this thread | | | Date | Fri, 24 Jun 2022 11:18:43 +0100 | From | Catalin Marinas <> | Subject | Re: [PATCH v4 3/4] mm: kmemleak: add rbtree and store physical address for objects allocated with PA |
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On Thu, Jun 23, 2022 at 07:25:15PM +0800, Yee Lee wrote: > On Thu, 2022-06-23 at 16:45 +0800, Yee Lee wrote: > > Now we have seperated rb_tree for phys and virts addresses. But why > > can't we have kmemleak_free_phys()? It may apply the same format to > > delete_object_full(). > > > > Some users would request to remove the kmemleak object from the phys > > tree but we don't have this one. > > Please check this, an issue happened at kfence with the latest kmemleak > patches. kfence pool allocated memory from memblock but have no way to > free it from the phys tree. > https://lkml.org/lkml/2022/6/23/486
I don't think I was cc'ed on the other thread but at a quick look, what you probably want is:
kmemleak_ignore_phys(__kfence_pool);
instead of the current kmemleak_free(). With Patrick's changes, you can no longer tell kmemleak about an object with a physical address and free it with the virtual one.
-- Catalin
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