Re: thread priority ?

> * Don Cohen <[email protected]> [2017-12-15 21:51:55 +0000]:
>
> I suspect a good place to use priorities would be in granting locks.

It seems like a sensible policy to let a high-priority threads grab
locks ahead of low-priority ones.
Is it actually done by OSes?

> For instance, knowing that a high priority process is waiting for a
> lock held by a low priority process could increase the priority of the
> second, until it releases the lock.

I am not sure this is really a good policy.
It seems to me that a low priority process being able to lock out a high
priority process is a sign of poor application design (there should be
a way for the high priority process to tell the low priority one to
release the lock immediately).
I don't think one can fix it with some OS-level policy.

Thanks.

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