linux-kernel - Re: [PATCH -next 1/2] block: fix that blk_time_get

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Message-ID: <9a4f8738-6ad5-407e-a938-83395aa1df4f@kernel.dk>
Date: Thu, 11 Apr 2024 10:44:39 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Yu Kuai <yukuai1@...weicloud.com>, johannes.thumshirn@....com
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
 yukuai3@...wei.com, yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH -next 1/2] block: fix that blk_time_get_ns() doesn't
 update time after schedule

On 4/10/24 9:23 PM, Yu Kuai wrote:
> diff --git a/block/blk-core.c b/block/blk-core.c
> index a16b5abdbbf5..e317d7bc0696 100644
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -1195,6 +1195,7 @@ void __blk_flush_plug(struct blk_plug *plug, bool from_schedule)
>  	if (unlikely(!rq_list_empty(plug->cached_rq)))
>  		blk_mq_free_plug_rqs(plug);
>  
> +	plug->cur_ktime = 0;
>  	current->flags &= ~PF_BLOCK_TS;
>  }

We can just use blk_plug_invalidate_ts() here, but not really important.
I think this one should go into 6.9, and patch 2 should go into 6.10,
however.

-- 
Jens Axboe