Messages in this thread | | | Date | Wed, 3 Sep 2008 12:35:43 +0300 | From | "Pekka Enberg" <> | Subject | Re: [uml-devel] [PATCH 4/6] VM: Annotate pagealloc |
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Hi Steve,
On Wed, Sep 3, 2008 at 8:25 AM, Steve VanDeBogart <vandebo-lkml@nerdbox.net> wrote: >>> Index: linux-2.6.27-rc5/mm/page_alloc.c >>> @@ -1080,6 +1081,7 @@ >>> if (!page) >>> goto failed; >>> } >>> + VALGRIND_MAKE_MEM_UNDEFINED(page_address(page), PAGE_SIZE << >>> order); >> >> No SHOUTING macros please, and I think you should just pass page and >> order here and do the calculation elsewhere. > > Valgrind provides a header file that defines these annotation functions. > For the ease of tracking changes to this header file, I've made minimal > changes to it (just a couple lines to integrate with Kconfig). If the > interfaces and/or style is objectionable to the kernel community at > large, than we will have to decide to either wrap the interface that > Valgrind provides or modify the header and track changes manually.
That's trivially fixable by adding a wrapper for the ugly valgrind macros and hiding that in some header file. Preferably something similar to what the kmemcheck hooks look like so that we can also use them in the future if we implement tracking at page allocator level too.
Pekka
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