linux-kernel - Re: [PATCH 2/3] kunit: make kunit_test

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Message-ID: <0423ef8e-bfd0-3a4b-78a5-17dc621660d2@huawei.com>
Date:   Wed, 9 Mar 2022 14:31:54 +0800
From:   "liupeng (DM)" <liupeng256@...wei.com>
To:     Marco Elver <elver@...gle.com>
CC:     <brendanhiggins@...gle.com>, <glider@...gle.com>,
        <dvyukov@...gle.com>, <akpm@...ux-foundation.org>,
        <linux-kselftest@...r.kernel.org>, <kunit-dev@...glegroups.com>,
        <linux-kernel@...r.kernel.org>, <kasan-dev@...glegroups.com>,
        <linux-mm@...ck.org>, <wangkefeng.wang@...wei.com>
Subject: Re: [PATCH 2/3] kunit: make kunit_test_timeout compatible with
 comment

Thank you for your advice.

On 2022/3/9 14:03, Marco Elver wrote:
> On Wed, 9 Mar 2022 at 02:29, 'Peng Liu' via kasan-dev
> <kasan-dev@...glegroups.com> wrote:
>> In function kunit_test_timeout, it is declared "300 * MSEC_PER_SEC"
>> represent 5min. However, it is wrong when dealing with arm64 whose
>> default HZ = 250, or some other situations. Use msecs_to_jiffies to
>> fix this, and kunit_test_timeout will work as desired.
>>
>> Signed-off-by: Peng Liu <liupeng256@...wei.com>
> Does this need a:
>
> Fixes: 5f3e06208920 ("kunit: test: add support for test abort")
>
> ?

Yes, I will add this description.

>> ---
>>   lib/kunit/try-catch.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/lib/kunit/try-catch.c b/lib/kunit/try-catch.c
>> index 6b3d4db94077..f7825991d576 100644
>> --- a/lib/kunit/try-catch.c
>> +++ b/lib/kunit/try-catch.c
>> @@ -52,7 +52,7 @@ static unsigned long kunit_test_timeout(void)
>>           * If tests timeout due to exceeding sysctl_hung_task_timeout_secs,
>>           * the task will be killed and an oops generated.
>>           */
>> -       return 300 * MSEC_PER_SEC; /* 5 min */
>> +       return 300 * msecs_to_jiffies(MSEC_PER_SEC); /* 5 min */
> Why not just "300 * HZ" ?

Because I have seen patch

df3c30f6e904 ("staging: lustre: replace direct HZ access with kernel APIs").

Here, both "msecs_to_jiffies(MSEC_PER_SEC)" and "300 * HZ" is ok for me.

>>   }
>>
>>   void kunit_try_catch_run(struct kunit_try_catch *try_catch, void *context)
>> --
>> 2.18.0.huawei.25
>>
>> --
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> .