Re: [PATCH] Uniquely identifying memory usage

cd_smith@ou.edu
Fri, 30 Jul 1999 23:22:06 -0500 (CDT)

On Fri, 30 Jul 1999, Alexander Viro wrote:
> Keep in mind that those animals are reused. OTOH adding a generation
> number to mm_struct is trivial - the only static one is init_mm (*never*
> happens to be tsk->mm under 2.3.11+, only for kernel threads under the
> earlier kernels) and the rest is always created by mm_alloc(). So it's a
> matter of one static counter.

Until the counter overflows and then you have to make sure you don't
re-use a number that's in use, etc. And the same race that you mention
below still applies.

> It's a race unless you are dealing with your children.

You're right, it is a race. So I hereby un-request that this patch be
included, and I'll write a new one soon that reorganizes stuff to make
usage possible without a race.

Chris Smith <cd_smith@ou.edu>

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