Messages in this thread | | | Date | Fri, 13 Apr 2007 22:46:18 +1000 | From | Nick Piggin <> | Subject | Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups |
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Ananth N Mavinakayanahalli wrote: > On Fri, Apr 13, 2007 at 12:50:20PM +1000, Nick Piggin wrote:
>>It definitely seems like you can use some kernel functions, but the >>ones I saw may just be systemtap facilities. But what is so surprising >>about being able to call a kernel function when running in kernel >>context? Perhaps there is some fundamental limitation of kprobes that >>I don't understand. > > > The main requirement for kprobes handlers is that they can't sleep. You > could definitely call a kernel function from kprobe handlers as long as > the function doesn't sleep.
That would be enough to access basically all the VM data structures.
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