[PATCH v3 04/11] blk-mq: Introduce blk_mq_quiesce_queue()

Bart Van Assche bart.vanassche at sandisk.com
Wed Oct 19 14:04:17 PDT 2016

On 10/18/2016 02:50 PM, Bart Van Assche wrote:
> blk_mq_quiesce_queue() waits until ongoing .queue_rq() invocations
> have finished. This function does *not* wait until all outstanding
> requests have finished (this means invocation of request.end_io()).

(replying to my own e-mail)

The zero-day kernel test infrastructure reported to me that this patch 
causes a build failure with CONFIG_SRCU=n. Should I add "select SRCU" to 
block/Kconfig (excludes TINY_RCU) or should I rather modify this patch 
such that a mutex or rwsem is used instead of SRCU?



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