Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups

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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References:
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Andrew Morton <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Nick Piggin <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Andrew Morton <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Nick Piggin <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Andrew Morton <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Nick Piggin <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Andrew Morton <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Nick Piggin <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Andrew Morton <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Nick Piggin <[email protected]>
- Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups
  - From: Ananth N Mavinakayanahalli <[email protected]>

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