linux-kernel - Re: [PATCH] block: Make rescuer threads per request

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Date:   Wed, 8 Feb 2017 14:22:42 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Kent Overstreet <kent.overstreet@...il.com>
Cc:     kbuild-all@...org, Pavel Machek <pavel@....cz>,
        Mike Snitzer <snitzer@...hat.com>,
        kernel list <linux-kernel@...r.kernel.org>, axboe@...com,
        hch@....de, neilb@...e.de, martin.petersen@...cle.com,
        dpark@...teo.net, ming.l@....samsung.com, dm-devel@...hat.com,
        ming.lei@...onical.com, agk@...hat.com, jkosina@...e.cz,
        geoff@...radead.org, jim@...n.com, pjk1939@...ux.vnet.ibm.com,
        minchan@...nel.org, ngupta@...are.org, oleg.drokin@...el.com,
        andreas.dilger@...el.com
Subject: Re: [PATCH] block: Make rescuer threads per request_queue, not per
 bioset

Hi Kent,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.10-rc7]
[cannot apply to next-20170207]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Kent-Overstreet/block-Make-rescuer-threads-per-request_queue-not-per-bioset/20170208-130414
config: x86_64-randconfig-x014-201706 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   kernel/sched/core.c: In function 'sched_submit_work':
>> kernel/sched/core.c:3445:7: error: implicit declaration of function 'bio_list_empty' [-Werror=implicit-function-declaration]
         !bio_list_empty(&tsk->bio_list->bios) &&
          ^~~~~~~~~~~~~~
>> kernel/sched/core.c:3445:36: error: dereferencing pointer to incomplete type 'struct bio_plug_list'
         !bio_list_empty(&tsk->bio_list->bios) &&
                                       ^~
>> kernel/sched/core.c:3447:3: error: implicit declaration of function 'blk_punt_blocked_bios' [-Werror=implicit-function-declaration]
      blk_punt_blocked_bios(tsk->bio_list);
      ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/bio_list_empty +3445 kernel/sched/core.c

  3439	static inline void sched_submit_work(struct task_struct *tsk)
  3440	{
  3441		if (!tsk->state || tsk_is_pi_blocked(tsk))
  3442			return;
  3443	
  3444		if (tsk->bio_list &&
> 3445		    !bio_list_empty(&tsk->bio_list->bios) &&
  3446		    tsk->bio_list->q->rescue_workqueue)
> 3447			blk_punt_blocked_bios(tsk->bio_list);
  3448	
  3449		/*
  3450		 * If we are going to sleep and we have plugged IO queued,

---
0-DAY kernel test infrastructure                Open Source Technology Center
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