From: Shuai Xue <xueshuai@linux.alibaba.com>
To: Borislav Petkov <bp@alien8.de>
Cc: rafael@kernel.org, wangkefeng.wang@huawei.com,
tanxiaofei@huawei.com, mawupeng1@huawei.com, tony.luck@intel.com,
linmiaohe@huawei.com, naoya.horiguchi@nec.com,
james.morse@arm.com, gregkh@linuxfoundation.org, will@kernel.org,
jarkko@kernel.org, linux-acpi@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, linux-edac@vger.kernel.org,
x86@kernel.org, justin.he@arm.com, ardb@kernel.org,
ying.huang@intel.com, ashish.kalra@amd.com,
baolin.wang@linux.alibaba.com, tglx@linutronix.de,
mingo@redhat.com, dave.hansen@linux.intel.com, lenb@kernel.org,
hpa@zytor.com, robert.moore@intel.com, lvying6@huawei.com,
xiexiuqi@huawei.com, zhuo.song@linux.alibaba.com
Subject: Re: [PATCH v11 2/3] mm: memory-failure: move return value documentation to function declaration
Date: Tue, 27 Feb 2024 09:27:57 +0800 [thread overview]
Message-ID: <76cc249c-31b2-4fd9-a36c-9ec184ffe01c@linux.alibaba.com> (raw)
In-Reply-To: <20240226104611.GCZdxr82q-Wcms7R3S@fat_crate.local>
On 2024/2/26 18:46, Borislav Petkov wrote:
> On Sun, Feb 04, 2024 at 04:01:43PM +0800, Shuai Xue wrote:
>> Part of return value comments for memory_failure() were originally
>> documented at the call site. Move those comments to the function
>> declaration to improve code readability and to provide developers with
>> immediate access to function usage and return information.
>>
>> Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
>> ---
>> arch/x86/kernel/cpu/mce/core.c | 9 +--------
>> mm/memory-failure.c | 9 ++++++---
>> 2 files changed, 7 insertions(+), 11 deletions(-)
>>
>> diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
>> index bc39252bc54f..822b21eb48ad 100644
>> --- a/arch/x86/kernel/cpu/mce/core.c
>> +++ b/arch/x86/kernel/cpu/mce/core.c
>> @@ -1365,17 +1365,10 @@ static void kill_me_maybe(struct callback_head *cb)
>> return;
>> }
>>
>> - /*
>> - * -EHWPOISON from memory_failure() means that it already sent SIGBUS
>> - * to the current process with the proper error info,
>> - * -EOPNOTSUPP means hwpoison_filter() filtered the error event,
>> - *
>> - * In both cases, no further processing is required.
>> - */
>> if (ret == -EHWPOISON || ret == -EOPNOTSUPP)
>> return;
>>
>> - pr_err("Memory error not recovered");
>> + pr_err("Sending SIGBUS to current task due to memory error not recovered");
>
> Unrelated change.
Yes, I will drop the error message change.
>
>> kill_me_now(cb);
>> }
>>
>> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
>> index 636280d04008..d33729c48eff 100644
>> --- a/mm/memory-failure.c
>> +++ b/mm/memory-failure.c
>> @@ -2175,9 +2175,12 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags,
>> * Must run in process context (e.g. a work queue) with interrupts
>> * enabled and no spinlocks held.
>> *
>> - * Return: 0 for successfully handled the memory error,
>> - * -EOPNOTSUPP for hwpoison_filter() filtered the error event,
>> - * < 0(except -EOPNOTSUPP) on failure.
>> + * Return values:
>> + * 0 - success
>> + * -EOPNOTSUPP - hwpoison_filter() filtered the error event.
>> + * -EHWPOISON - sent SIGBUS to the current process with the proper
>> + * error info by kill_accessing_process().
>
> kill_accessing_process() is not the only one returning -EHWPOISON.
>
> And if you look at the code, it should be:
>
> -EHWPOISON - the page was already poisoned, potentially
> kill process
>
> or so.
>
You are right, will fix it in next version.
Thank you.
Best Regards.
Shuai
next prev parent reply other threads:[~2024-02-27 1:28 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-27 4:24 [PATCH] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on action required events Shuai Xue
2022-10-28 17:08 ` Rafael J. Wysocki
2022-10-28 17:25 ` Luck, Tony
2022-11-02 11:53 ` Shuai Xue
2022-11-22 11:40 ` Shuai Xue
2022-11-02 7:07 ` Shuai Xue
2022-12-06 15:33 ` [RFC PATCH 0/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2022-12-07 9:54 ` reply for " Lv Ying
2022-12-07 12:34 ` Bixuan Cui
2022-12-07 12:56 ` Shuai Xue
2022-12-07 14:04 ` Shuai Xue
2022-12-08 2:27 ` Lv Ying
2022-12-06 15:33 ` [RFC PATCH 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2022-12-06 15:33 ` [RFC PATCH 2/2] ACPI: APEI: separate synchronous error handling into task work Shuai Xue
2023-02-27 5:03 ` [PATCH v2 0/2] ACPI: APEI: handle synchronous exceptions with proper si_code Shuai Xue
2023-03-06 0:45 ` Shuai Xue
2023-02-27 5:03 ` [PATCH v2 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-03-16 7:21 ` HORIGUCHI NAOYA(堀口 直也)
2023-03-16 9:57 ` Shuai Xue
2023-03-16 16:45 ` Luck, Tony
2023-03-17 1:12 ` Shuai Xue
2023-02-27 5:03 ` [PATCH v2 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-03-16 7:21 ` HORIGUCHI NAOYA(堀口 直也)
2023-03-16 11:10 ` Shuai Xue
2023-03-17 0:29 ` HORIGUCHI NAOYA(堀口 直也)
2023-03-17 1:24 ` Shuai Xue
2023-03-17 7:24 ` [PATCH v3 0/2] ACPI: APEI: handle synchronous exceptions with proper si_code Shuai Xue
2023-03-20 18:03 ` Rafael J. Wysocki
2023-03-30 6:11 ` Shuai Xue
2023-03-30 9:52 ` Rafael J. Wysocki
2023-03-21 7:17 ` mawupeng
2023-03-22 1:27 ` Shuai Xue
2023-03-17 7:24 ` [PATCH v3 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-03-17 7:24 ` [PATCH v3 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-04-06 12:39 ` Xiaofei Tan
2023-04-07 2:21 ` Shuai Xue
2023-04-08 9:13 ` [PATCH v4 0/2] ACPI: APEI: handle synchronous exceptions with proper si_code Shuai Xue
2023-04-08 9:13 ` [PATCH v4 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-04-08 9:13 ` [PATCH v4 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-04-11 1:44 ` Xiaofei Tan
2023-04-11 3:16 ` Shuai Xue
2023-04-11 9:02 ` Xiaofei Tan
2023-04-11 9:48 ` Shuai Xue
2023-04-11 10:48 ` [PATCH v5 0/2] ACPI: APEI: handle synchronous exceptions with proper si_code Shuai Xue
2023-04-11 10:48 ` [PATCH v5 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-04-11 14:17 ` Kefeng Wang
2023-04-12 2:54 ` Shuai Xue
2023-04-12 3:55 ` Xiaofei Tan
2023-04-13 1:42 ` Shuai Xue
2023-04-11 10:48 ` [PATCH v5 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-04-11 14:28 ` Kefeng Wang
2023-04-12 2:58 ` Shuai Xue
2023-04-12 4:05 ` Xiaofei Tan
2023-04-13 1:49 ` Shuai Xue
2023-04-12 11:27 ` [PATCH v6 0/2] ACPI: APEI: handle synchronous exceptions with proper si_code Shuai Xue
2023-04-12 11:28 ` [PATCH v6 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-04-12 11:28 ` [PATCH v6 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-04-17 1:14 ` [PATCH v7 0/2] ACPI: APEI: handle synchronous exceptions with proper si_code Shuai Xue
2023-04-24 6:24 ` Shuai Xue
2023-05-08 1:55 ` Shuai Xue
2023-04-17 1:14 ` [PATCH v7 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-04-17 1:14 ` [PATCH v7 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-09-19 2:21 ` [RESEND PATCH v8 0/2] ACPI: APEI: handle synchronous errors in task work with proper si_code Shuai Xue
2023-09-19 2:21 ` [RESEND PATCH v8 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-09-25 14:43 ` Jarkko Sakkinen
2023-09-26 6:23 ` Shuai Xue
2023-09-19 2:21 ` [RESEND PATCH v8 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-09-25 15:00 ` Jarkko Sakkinen
2023-09-26 6:38 ` Shuai Xue
2023-10-03 8:28 ` Naoya Horiguchi
2023-10-07 2:01 ` Shuai Xue
2023-10-07 7:28 ` [PATCH v9 0/2] ACPI: APEI: handle synchronous errors in task work with proper si_code Shuai Xue
2023-11-21 1:48 ` Shuai Xue
2023-11-23 15:07 ` Borislav Petkov
2023-11-25 6:44 ` Shuai Xue
2023-11-25 12:10 ` Borislav Petkov
2023-11-26 12:25 ` Shuai Xue
2023-11-29 18:54 ` Borislav Petkov
2023-11-30 2:58 ` Shuai Xue
2023-11-30 14:40 ` Borislav Petkov
2023-11-30 17:43 ` James Morse
2023-12-01 2:58 ` Shuai Xue
2023-11-30 17:39 ` James Morse
2023-12-01 3:37 ` Shuai Xue
2023-10-07 7:28 ` [PATCH v9 1/2] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-11-30 17:39 ` James Morse
2023-12-01 5:22 ` Shuai Xue
2023-10-07 7:28 ` [PATCH v9 2/2] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-11-30 17:39 ` James Morse
2023-12-01 7:03 ` Shuai Xue
2023-12-18 6:45 ` [PATCH v10 0/4] ACPI: APEI: handle synchronous errors in task work with proper si_code Shuai Xue
2023-12-18 6:45 ` [PATCH v10 1/4] ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events Shuai Xue
2023-12-18 6:53 ` Greg KH
2023-12-21 13:55 ` Rafael J. Wysocki
2023-12-22 1:07 ` Shuai Xue
2023-12-18 6:45 ` [PATCH v10 2/4] ACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered Shuai Xue
2023-12-18 6:54 ` Greg KH
2023-12-18 6:45 ` [PATCH v10 3/4] mm: memory-failure: move memory_failure() return value documentation to function declaration Shuai Xue
2023-12-18 6:54 ` Greg KH
2023-12-18 6:45 ` [PATCH v10 4/4] ACPI: APEI: handle synchronous exceptions in task work Shuai Xue
2023-12-18 6:54 ` Greg KH
2024-02-04 8:01 ` [PATCH v11 0/3] ACPI: APEI: handle synchronous exceptions in task work to send correct SIGBUS si_code Shuai Xue
2024-02-19 1:46 ` Shuai Xue
2024-02-04 8:01 ` [PATCH v11 1/3] ACPI: APEI: send SIGBUS to current task if synchronous memory error not recovered Shuai Xue
2024-02-19 9:25 ` Borislav Petkov
2024-02-22 2:07 ` Shuai Xue
2024-02-23 5:26 ` Dan Williams
2024-02-23 12:08 ` Jonathan Cameron
2024-02-23 12:17 ` Jonathan Cameron
2024-02-24 6:08 ` Shuai Xue
2024-02-26 10:29 ` Borislav Petkov
2024-02-27 1:23 ` Shuai Xue
2024-02-24 19:42 ` Dan Williams
2024-02-24 19:40 ` Dan Williams
2024-02-04 8:01 ` [PATCH v11 2/3] mm: memory-failure: move return value documentation to function declaration Shuai Xue
2024-02-26 10:46 ` Borislav Petkov
2024-02-27 1:27 ` Shuai Xue [this message]
2024-02-04 8:01 ` [PATCH v11 3/3] ACPI: APEI: handle synchronous exceptions in task work to send correct SIGBUS si_code Shuai Xue
2024-02-29 7:05 ` Shuai Xue
2024-03-08 10:18 ` Borislav Petkov
2024-03-12 6:05 ` Shuai Xue
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