linux-kernel - Re: [PATCH -next,V2] fscache: support to disable assert macro

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Date:   Thu, 30 Nov 2023 10:50:27 +0800
From:   Zizhi Wo <wozizhi@...wei.com>
To:     Gao Xiang <hsiangkao@...ux.alibaba.com>, <dhowells@...hat.com>
CC:     <linux-cachefs@...hat.com>, <linux-kernel@...r.kernel.org>,
        <yangerkun@...wei.com>
Subject: Re: [PATCH -next,V2] fscache: support to disable assert macro

friendly ping

在 2023/11/8 10:25, Zizhi Wo 写道:
> 
> 
> 在 2023/11/7 20:39, Gao Xiang 写道:
>>
>>
>> On 2023/11/7 18:16, Zizhi Wo wrote:
>>> friendly ping
>>>
>>> 在 2023/11/2 0:34, WoZ1zh1 写道:
>>>> In fs/fscache/internal.h, ASSERT macro is enabled by default and can 
>>>> not
>>>> be disabled, then assert failure will crash the kernel as the BUG() is
>>>> included in the ASSERT macro. Therefore, add FSCACHE_ASSERT to 
>>>> control it.
>>
>> Personally it looks good to me, yet we could also turn
>> them into WARN_ON_ONCE case by case? Anyway, it depends
>> on how David thinks...
>>
> Thank you for your recognition!
> 
> Thanks,
> Zizhi Wo
> 
>> Thanks,
>> Gao Xiang
>>
>>>>
>>>> Signed-off-by: WoZ1zh1 <wozizhi@...wei.com>
>>>> ---
>>>>   fs/fscache/Kconfig    | 10 ++++++++++
>>>>   fs/fscache/internal.h |  2 +-
>>>>   2 files changed, 11 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/fs/fscache/Kconfig b/fs/fscache/Kconfig
>>>> index b313a978ae0a..7ff844038bc3 100644
>>>> --- a/fs/fscache/Kconfig
>>>> +++ b/fs/fscache/Kconfig
>>>> @@ -38,3 +38,13 @@ config FSCACHE_DEBUG
>>>>         enabled by setting bits in 
>>>> /sys/modules/fscache/parameter/debug.
>>>>         See Documentation/filesystems/caching/fscache.rst for more 
>>>> information.
>>>> +
>>>> +config FSCACHE_ASSERT
>>>> +    bool "FSCACHE asserts"
>>>> +    default n
>>>> +    depends on FSCACHE
>>>> +    help
>>>> +      Support the ASSERT mode for failure behavior.
>>>> +      Say N here to disable the ASSERT by default.
>>>> +      Say Y to add assertion checks in some places. But the assertion
>>>> +      failure will result in fatal errors that BUG() the kernel.
>>>> diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
>>>> index 1336f517e9b1..951166ed772f 100644
>>>> --- a/fs/fscache/internal.h
>>>> +++ b/fs/fscache/internal.h
>>>> @@ -225,7 +225,7 @@ do {                        \
>>>>   /*
>>>>    * assertions
>>>>    */
>>>> -#if 1 /* defined(__KDEBUGALL) */
>>>> +#ifdef CONFIG_FSCACHE_ASSERT
>>>>   #define ASSERT(X)                            \
>>>>   do {                                    \
>>