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

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Date: Thu, 25 Jan 2024 19:56:28 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Xiao Ni <xni@...hat.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, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH v2 05/11] md: export helpers to stop sync_thread

Hi,

在 2024/01/25 19:52, Xiao Ni 写道:
> 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.

I somehow send out this draft. Please check the other reply.

Kuai
> 
> 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
>>>>
>>>
>>> .
>>>
>>
> 
> 
> .
>