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SubjectRe: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP)
On 01/17/2010 04:52 PM, Peter Zijlstra wrote:
> On Sun, 2010-01-17 at 16:39 +0200, Avi Kivity wrote:
>
>> On 01/15/2010 11:50 AM, Peter Zijlstra wrote:
>>
>>> As previously stated, I think poking at a process's address space is an
>>> utter no-go.
>>>
>>>
>> Why not reserve an address space range for this, somewhere near the top
>> of memory? It doesn't have to be populated if it isn't used.
>>
> Because I think poking at a process's address space like that is gross.
>

If it's reserved, it's no longer the process' address space.

> Also, if its fixed size you're imposing artificial limits on the number
> of possible probes.
>

Obviously we'll need a limit, a uprobe will also take kernel memory, we
can't allow people to exhaust it.

--
error compiling committee.c: too many arguments to function



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