Re: [PATCH 1/3] block: Implement a blk_yield function to voluntarily give up the I/O scheduler.
From: Jeff Moyer
Date: Fri Jun 25 2010 - 15:57:28 EST
Jens Axboe <axboe@xxxxxxxxx> writes:
> 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.
OK, easy enough. Thanks!
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