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| H A D | blk-flush.c | diff b175c86739d38e41044d3136065f092a6d95aee6 Sun Jul 16 23:00:57 CDT 2023 Chengming Zhou <zhouchengming@bytedance.com> blk-flush: count inflight flush_data requests
The flush state machine use a double list to link all inflight
flush_data requests, to avoid issuing separate post-flushes for
these flush_data requests which shared PREFLUSH.
So we can't reuse rq->queuelist, this is why we need rq->flush.list
In preparation of the next patch that reuse rq->queuelist for flush
state machine, we change the double linked list to unsigned long
counter, which count all inflight flush_data requests.
This is ok since we only need to know if there is any inflight
flush_data request, so unsigned long counter is good.
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230717040058.3993930-4-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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| H A D | blk.h | diff b175c86739d38e41044d3136065f092a6d95aee6 Sun Jul 16 23:00:57 CDT 2023 Chengming Zhou <zhouchengming@bytedance.com> blk-flush: count inflight flush_data requests
The flush state machine use a double list to link all inflight
flush_data requests, to avoid issuing separate post-flushes for
these flush_data requests which shared PREFLUSH.
So we can't reuse rq->queuelist, this is why we need rq->flush.list
In preparation of the next patch that reuse rq->queuelist for flush
state machine, we change the double linked list to unsigned long
counter, which count all inflight flush_data requests.
This is ok since we only need to know if there is any inflight
flush_data request, so unsigned long counter is good.
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230717040058.3993930-4-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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