linux-kernel - Re: [PATCH] blk-mq-debugfs: Add decode for BLK_MQ_F_TAG_HCTX

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Date:   Mon, 11 Jan 2021 08:11:24 +0100
From:   Hannes Reinecke <hare@...e.de>
To:     John Garry <john.garry@...wei.com>, axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-mq-debugfs: Add decode for BLK_MQ_F_TAG_HCTX_SHARED

On 1/8/21 9:55 AM, John Garry wrote:
> Showing the hctx flags for when BLK_MQ_F_TAG_HCTX_SHARED is set gives
> something like:
> 
> root@...ian:/home/john# more /sys/kernel/debug/block/sda/hctx0/flags
> alloc_policy=FIFO SHOULD_MERGE|TAG_QUEUE_SHARED|3
> 
> Add the decoding for that flag.
> 
> Fixes: 32bc15afed04b ("blk-mq: Facilitate a shared sbitmap per tagset")
> Signed-off-by: John Garry <john.garry@...wei.com>
> 
> diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
> index 3094542e12ae..ea4ab98e6b25 100644
> --- a/block/blk-mq-debugfs.c
> +++ b/block/blk-mq-debugfs.c
> @@ -245,6 +245,7 @@ static const char *const hctx_flag_name[] = {
>   	HCTX_FLAG_NAME(BLOCKING),
>   	HCTX_FLAG_NAME(NO_SCHED),
>   	HCTX_FLAG_NAME(STACKING),
> +	HCTX_FLAG_NAME(TAG_HCTX_SHARED),
>   };
>   #undef HCTX_FLAG_NAME
>   
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@...e.de                              +49 911 74053 688
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