Re: 2.4.2-ac3: loop threads in D state
Jens Axboe (axboe@suse.de)
Mon, 26 Feb 2001 01:33:26 +0100
On Sun, Feb 25 2001, Alexander Viro wrote:
> Erm... Jens, it really should be
> if (atomic_dec_and_test(...))
> up(...);
> not just
> atomic_dec(...);
> up(...);
>
> Otherwise you can end up with too early exit of loop_thread. Normally
> it would not matter, but in pathological cases...
How so? We dec it and up the semaphore, loop_thread runs until it's
done and ups lo_sem.
--
Jens Axboe
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