Re: [PATCH 2/2] mm: fs: Invalidate BH LRU during page migration

kernel test robot
2021-03-03T18:08:49Z

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Hi Minchan,

I love your patch! Yet something to improve:

[auto build test ERROR on block/for-next]
[also build test ERROR on linux/master linus/master v5.12-rc1 next-20210303]
[cannot apply to hnaz-linux-mm/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Minchan-Kim/mm-disable-LRU-pagevec-during-the-migration-temporarily/20210303-191809
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: arm-randconfig-r031-20210303 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/a1c74fba81d1258e320ef52bc995cb0333e3e083
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Minchan-Kim/mm-disable-LRU-pagevec-during-the-migration-temporarily/20210303-191809
git checkout a1c74fba81d1258e320ef52bc995cb0333e3e083
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

mm/swap.c: In function 'lru_add_drain_cpu':
>> mm/swap.c:671:2: error: implicit declaration of function 'invalidate_bh_lru'; did you mean 'invalidate_bdev'? [-Werror=implicit-function-declaration]
671 | invalidate_bh_lru(NULL);
| ^~~~~~~~~~~~~~~~~
| invalidate_bdev
mm/swap.c: At top level:
mm/swap.c:874:6: error: conflicting types for 'lru_add_drain_all'
874 | void lru_add_drain_all(void)
| ^~~~~~~~~~~~~~~~~
In file included from mm/swap.c:20:
include/linux/swap.h:348:13: note: previous declaration of 'lru_add_drain_all' was here
348 | extern void lru_add_drain_all(bool force_all_cpus);
| ^~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +671 mm/swap.c

634
635 /*
636 * Drain pages out of the cpu's pagevecs.
637 * Either "cpu" is the current CPU, and preemption has already been
638 * disabled; or "cpu" is being hot-unplugged, and is already dead.
639 */
640 void lru_add_drain_cpu(int cpu)
641 {
642 struct pagevec *pvec = &per_cpu(lru_pvecs.lru_add, cpu);
643
644 if (pagevec_count(pvec))
645 __pagevec_lru_add(pvec);
646
647 pvec = &per_cpu(lru_rotate.pvec, cpu);
648 /* Disabling interrupts below acts as a compiler barrier. */
649 if (data_race(pagevec_count(pvec))) {
650 unsigned long flags;
651
652 /* No harm done if a racing interrupt already did this */
653 local_lock_irqsave(&lru_rotate.lock, flags);
654 pagevec_lru_move_fn(pvec, pagevec_move_tail_fn);
655 local_unlock_irqrestore(&lru_rotate.lock, flags);
656 }
657
658 pvec = &per_cpu(lru_pvecs.lru_deactivate_file, cpu);
659 if (pagevec_count(pvec))
660 pagevec_lru_move_fn(pvec, lru_deactivate_file_fn);
661
662 pvec = &per_cpu(lru_pvecs.lru_deactivate, cpu);
663 if (pagevec_count(pvec))
664 pagevec_lru_move_fn(pvec, lru_deactivate_fn);
665
666 pvec = &per_cpu(lru_pvecs.lru_lazyfree, cpu);
667 if (pagevec_count(pvec))
668 pagevec_lru_move_fn(pvec, lru_lazyfree_fn);
669
670 activate_page_drain(cpu);
> 671 invalidate_bh_lru(NULL);
672 }
673

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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