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

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Message-ID: <d7b8043e-c921-8769-f39f-5105f2e866b6@huawei.com>
Date: Thu, 25 Jan 2024 19:42:34 +0800
From: Yu Kuai <yukuai3@...wei.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>
Subject: Re: [PATCH v2 05/11] md: export helpers to stop sync_thread

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:

> 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:


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
>>
> 
> .
>