Re: [RFC] sched: make callers check lock contention forcond_resched_lock()

[Peter Zijlstra]

On Thu, 2012-05-03 at 21:22 +0900, Takuya Yoshikawa wrote:
> Although the real use case is out of this RFC patch, we are now discussing
> a case in which we may hold a spin_lock for long time, ms order, depending
> on workload;  and in that case, other threads -- VCPU threads -- should be
> given higher priority for that problematic lock. 

Firstly, if you can hold a lock that long, it shouldn't be a spinlock,
secondly why isn't TIF_RESCHED being set if its running that long? That
should still make cond_resched_lock() break.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/