linux-kernel - Re: [PATCH v2 05/11] md: export helpers to stop sync

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Date: Thu, 25 Jan 2024 19:52:04 +0800
From: Xiao Ni <xni@...hat.com>
To: Yu Kuai <yukuai3@...wei.com>
Cc: agk@...hat.com, snitzer@...nel.org, mpatocka@...hat.com, 
	dm-devel@...ts.linux.dev, song@...nel.org, neilb@...e.de, heinzm@...hat.com, 
	shli@...com, akpm@...l.org, linux-kernel@...r.kernel.org, 
	linux-raid@...r.kernel.org, yukuai1@...weicloud.com, yi.zhang@...wei.com, 
	yangerkun@...wei.com
Subject: Re: [PATCH v2 05/11] md: export helpers to stop sync_thread

On Thu, Jan 25, 2024 at 7:42 PM Yu Kuai <yukuai3@...wei.com> wrote:
>
> Hi,
>
> 在 2024/01/25 19:35, Xiao Ni 写道:
> > Hi all
> >
> > This is the result of lvm2 tests:
> > make check
> > ### 426 tests: 319 passed, 74 skipped, 0 timed out, 5 warned, 28
> > failed   in 56:04.914
>
> Are you testing with this patchset? 28 failed is much more than my
> test result in following:

Yes, 6.7.0-rc8 with this patch set.
>
> > make[1]: *** [Makefile:138: check] Error 1
> > make[1]: Leaving directory '/root/lvm2/test'
> > make: *** [Makefile:89: check] Error 2
> >
> > Do you know where to check which cases fail?
>
> I saved logs and grep keyword "failed:", and the result will look like
> this:

I'll use this way to collect the failed cases.

Regards
Xiao
>
>
> You can find each test log in the dir test/result/
> >
> > Best Regards
> > Xiao
> >
> > On Wed, Jan 24, 2024 at 5:19 PM Yu Kuai <yukuai3@...wei.com> wrote:
> >>
> >> The new heleprs will be used in dm-raid in later patches to fix
> >> regressions and prevent calling md_reap_sync_thread() directly.
> >>
> >> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> >> ---
> >>   drivers/md/md.c | 41 +++++++++++++++++++++++++++++++++++++----
> >>   drivers/md/md.h |  3 +++
> >>   2 files changed, 40 insertions(+), 4 deletions(-)
> >>
> >> diff --git a/drivers/md/md.c b/drivers/md/md.c
> >> index 6c5d0a372927..90cf31b53804 100644
> >> --- a/drivers/md/md.c
> >> +++ b/drivers/md/md.c
> >> @@ -4915,30 +4915,63 @@ static void stop_sync_thread(struct mddev *mddev, bool locked, bool check_seq)
> >>                  mddev_lock_nointr(mddev);
> >>   }
> >>
> >> -static void idle_sync_thread(struct mddev *mddev)
> >> +void md_idle_sync_thread(struct mddev *mddev)
> >>   {
> >> +       lockdep_assert_held(mddev->reconfig_mutex);
> >> +
> >>          mutex_lock(&mddev->sync_mutex);
> >>          clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> >> +       stop_sync_thread(mddev, true, true);
> >> +       mutex_unlock(&mddev->sync_mutex);
> >> +}
> >> +EXPORT_SYMBOL_GPL(md_idle_sync_thread);
> >> +
> >> +void md_frozen_sync_thread(struct mddev *mddev)
> >> +{
> >> +       lockdep_assert_held(mddev->reconfig_mutex);
> >> +
> >> +       mutex_lock(&mddev->sync_mutex);
> >> +       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> >> +       stop_sync_thread(mddev, true, false);
> >> +       mutex_unlock(&mddev->sync_mutex);
> >> +}
> >> +EXPORT_SYMBOL_GPL(md_frozen_sync_thread);
> >>
> >> +void md_unfrozen_sync_thread(struct mddev *mddev)
> >> +{
> >> +       lockdep_assert_held(mddev->reconfig_mutex);
> >> +
> >> +       mutex_lock(&mddev->sync_mutex);
> >> +       clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> >> +       set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
> >> +       md_wakeup_thread(mddev->thread);
> >> +       sysfs_notify_dirent_safe(mddev->sysfs_action);
> >> +       mutex_unlock(&mddev->sync_mutex);
> >> +}
> >> +EXPORT_SYMBOL_GPL(md_unfrozen_sync_thread);
> >> +
> >> +static void idle_sync_thread(struct mddev *mddev)
> >> +{
> >>          if (mddev_lock(mddev)) {
> >>                  mutex_unlock(&mddev->sync_mutex);
> >>                  return;
> >>          }
> >>
> >> +       mutex_lock(&mddev->sync_mutex);
> >> +       clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> >>          stop_sync_thread(mddev, false, true);
> >>          mutex_unlock(&mddev->sync_mutex);
> >>   }
> >>
> >>   static void frozen_sync_thread(struct mddev *mddev)
> >>   {
> >> -       mutex_lock(&mddev->sync_mutex);
> >> -       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> >> -
> >>          if (mddev_lock(mddev)) {
> >>                  mutex_unlock(&mddev->sync_mutex);
> >>                  return;
> >>          }
> >>
> >> +       mutex_lock(&mddev->sync_mutex);
> >> +       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> >>          stop_sync_thread(mddev, false, false);
> >>          mutex_unlock(&mddev->sync_mutex);
> >>   }
> >> diff --git a/drivers/md/md.h b/drivers/md/md.h
> >> index 8d881cc59799..437ab70ce79b 100644
> >> --- a/drivers/md/md.h
> >> +++ b/drivers/md/md.h
> >> @@ -781,6 +781,9 @@ extern void md_rdev_clear(struct md_rdev *rdev);
> >>   extern void md_handle_request(struct mddev *mddev, struct bio *bio);
> >>   extern int mddev_suspend(struct mddev *mddev, bool interruptible);
> >>   extern void mddev_resume(struct mddev *mddev);
> >> +extern void md_idle_sync_thread(struct mddev *mddev);
> >> +extern void md_frozen_sync_thread(struct mddev *mddev);
> >> +extern void md_unfrozen_sync_thread(struct mddev *mddev);
> >>
> >>   extern void md_reload_sb(struct mddev *mddev, int raid_disk);
> >>   extern void md_update_sb(struct mddev *mddev, int force);
> >> --
> >> 2.39.2
> >>
> >
> > .
> >
>