On 01/26/2017 01:47 PM, Bart Van Assche wrote:
> On 01/26/2017 11:01 AM, Jens Axboe wrote:
>> On 01/26/2017 11:59 AM, hch@xxxxxx wrote:
>>> On Thu, Jan 26, 2017 at 11:57:36AM -0700, Jens Axboe wrote:
>>>> It's against my for-4.11/block, which you were running under Christoph's
>>>> patches. Maybe he's using an older version? In any case, should be
>>>> pretty trivial for you to hand apply. Just ensure that .flags is set to
>>>> 0 for the common cases, and inherit 'flags' when it is passed in.
>>>
>>> No, the flush op cleanups you asked for last round create a conflict
>>> with your patch. They should be trivial to fix, though.
>>
>> Ah, makes sense. And yes, as I said, should be trivial to hand apply the
>> hunk that does fail.
>
> Hello Jens and Christoph,
>
> With the below patch applied the test got a little further but did not
> pass unfortunately. I tried to analyze the new call stack but it's not yet
> clear to me what is going on.
>
> The patch I had applied on Christoph's tree:
>
> ---
> block/blk-mq-sched.c | 2 +-
> block/blk-mq.c | 6 +++---
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
> index 3bd66e50ec84..7c9318755fab 100644
> --- a/block/blk-mq-sched.c
> +++ b/block/blk-mq-sched.c
> @@ -116,7 +116,7 @@ struct request *blk_mq_sched_get_request(struct request_queue *q,
> ctx = blk_mq_get_ctx(q);
> hctx = blk_mq_map_queue(q, ctx->cpu);
>
> - blk_mq_set_alloc_data(data, q, 0, ctx, hctx);
> + blk_mq_set_alloc_data(data, q, data->flags, ctx, hctx);
>
> if (e) {
> data->flags |= BLK_MQ_REQ_INTERNAL;
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index 83640869d9e4..6697626e5d32 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -248,7 +248,7 @@ EXPORT_SYMBOL_GPL(__blk_mq_alloc_request);
> struct request *blk_mq_alloc_request(struct request_queue *q, int rw,
> unsigned int flags)
> {
> - struct blk_mq_alloc_data alloc_data;
> + struct blk_mq_alloc_data alloc_data = { .flags = flags };
> struct request *rq;
> int ret;
>
> @@ -1369,7 +1369,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
> {
> const int is_sync = op_is_sync(bio->bi_opf);
> const int is_flush_fua = op_is_flush(bio->bi_opf);
> - struct blk_mq_alloc_data data;
> + struct blk_mq_alloc_data data = { };
> struct request *rq;
> unsigned int request_count = 0, srcu_idx;
> struct blk_plug *plug;
> @@ -1491,7 +1491,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
> const int is_flush_fua = op_is_flush(bio->bi_opf);
> struct blk_plug *plug;
> unsigned int request_count = 0;
> - struct blk_mq_alloc_data data;
> + struct blk_mq_alloc_data data = { };
> struct request *rq;
> blk_qc_t cookie;
> unsigned int wb_acct;
Looks correct to me. Your call path has blk_get_request() in it, I don't have
that in my tree. Is it passing in the right mask?
--
Jens Axboe
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