Re: [patch 1/4] Add routine for generating an ID for kernel pointer

From: Cyrill Gorcunov
Date: Wed Dec 28 2011 - 12:05:28 EST

On Wed, Dec 28, 2011 at 04:51:14PM +0000, Alan Cox wrote:
> > + be used for anything but the "sameness" test. Besides, the IDs are
> > + dynamic and valid only while object is alive, once it get freed or
> Please explain your locking model which ensures a false sameness cannot
> occur due to object reuse as you do the comparison and scan.

It can happen in case of object re-allocated from slab. But in case
of two living pids it's impossible to get same pointers for different
objects. Or I misunderstood the question, Alan? It's up to application
to not compare objects from dead tasks.

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