| Date | Wed, 25 Jul 2012 18:11:53 +0200 | From | Frederic Weisbecker <> | Subject | Re: [PATCH 03/17] perf, x86: Add copy_from_user_nmi_nochk for best effort copy |
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On Sun, Jul 22, 2012 at 02:14:26PM +0200, Jiri Olsa wrote: > Adding copy_from_user_nmi_nochk that provides the best effort > copy regardless the requesting size crossing the task boundary. > > This is going to be useful for stack dump we need in post > DWARF CFI based unwind, where we have predefined size of > the user stack to dump, and we need to store the most of > the requested dump size, regardless this size is crossing > the task boundary.
What does that imply when we cross this limit? Are we still in the task stack?
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