linux-kernel - Re: [PATCH v8 1/6] ksm: support unsharing KSM-placed zero pages

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Message-Id: <20230523135709.6902-1-xu.xin16@zte.com.cn>
Date:   Tue, 23 May 2023 21:57:09 +0800
From:   xu xin <xu.xin.sc@...il.com>
To:     david@...hat.com
Cc:     akpm@...ux-foundation.org, imbrenda@...ux.ibm.com,
        jiang.xuexin@....com.cn, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, ran.xiaokai@....com.cn, xu.xin.sc@...il.com,
        xu.xin16@....com.cn, yang.yang29@....com.cn
Subject: Re: [PATCH v8 1/6] ksm: support unsharing KSM-placed zero pages

>> ---
>>   include/linux/ksm.h | 6 ++++++
>>   mm/ksm.c            | 5 +++--
>>   2 files changed, 9 insertions(+), 2 deletions(-)
>> 
>> diff --git a/include/linux/ksm.h b/include/linux/ksm.h
>> index 899a314bc487..7989200cdbb7 100644
>> --- a/include/linux/ksm.h
>> +++ b/include/linux/ksm.h
>> @@ -26,6 +26,9 @@ int ksm_disable(struct mm_struct *mm);
>>   
>>   int __ksm_enter(struct mm_struct *mm);
>>   void __ksm_exit(struct mm_struct *mm);
>> +/* use pte_mkdirty to track a KSM-placed zero page */
>> +#define set_pte_ksm_zero(pte)	pte_mkdirty(pte_mkspecial(pte))
>
>If there is only a single user (which I assume), please inline it instead.

Excuse me, I'm wondering why using inline here instead of macro is better.
Thanks! :)

Thanks for reviews.