Re: double-acquire deadlock

[raja <vnagaraju@xxxxxxxxxxxx>]

Thank you so much.

I too read the same thing.But I am unable to understand that point.

Now It is cleared for me.



On Thu, 2005-09-22 at 12:05 +0500, Fawad Lateef wrote:
> On 9/22/05, raja <vnagaraju@xxxxxxxxxxxx> wrote:
> > Hi,
> >   Would you please explain me wht is the concept of "double-acquire
> > deadlock"
> >
> 
> Double-Acquire deadlock refers to the term that you took a lock and
> then with-in the lock you are again trying to acquire the same lock
> which you already acquired, so this will creates a deallock ...
> 
> I read this point some-where else which might clear you little more :
> 
>          Spin locks can be used in interrupt handlers, but before
> obtaining the lock, one should disable local interrupts(on current
> processor), or it will cause double-acquire deadlock.
> 
> This means that your same interrupt handler can again be called if you
> don't disables local interrupts  and in that you will try to acquire
> the same lock again which is already lock ...... (Correct me if my
> interpretation of the above point is wrong)
> 
> --
> Fawad Lateef


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