[PATCH 3/8] blk-mq: move the srcu_struct used for quiescing to the tagset

[Christoph Hellwig]

On Fri, Oct 21, 2022 at 03:16:50PM +0800, Chao Leng wrote:
>>   	struct list_head	tag_list;
>> +	struct srcu_struct	srcu;
> srcu_struct size is more than 50+ KB, it is waste for the tagset which do not set
> the BLK_MQ_F_BLOCKING, and most tagsets do not set the BLK_MQ_F_BLOCKING.
> Maybe we can define "srcu" as a pointer, and allocate the memory in blk_mq_alloc_tag_set
> just for tagset which set the BLK_MQ_F_BLOCKING.

I guess we could do that.  Still better than the variable sized struct.

p.s. any chance you could properly trim your replies?  I took me a while
to find your comment in the sea of quotes.