Re: [PATCH 1/3] block: Implement a blk_yield function to voluntarilygive up the I/O scheduler.

From: Jens Axboe
Date: Fri Jun 25 2010 - 14:55:13 EST

On 25/06/10 18.51, Jeff Moyer wrote:
>>> + cfq_log_cfqq(cfqd, cfqq, "yielding queue to %d", tsk->pid);
>>> + cfqq->yield_to = new_cic;
>> We are stashing away a pointer to cic without taking reference?
> There is no reference counting on the cic.

Not on the cic itself, but on the io context it belongs to. So you
need to grab a reference to that, if you are stowing a reference
to the cic.

Jens Axboe

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