linux-kernel - Re: [PATCH v4 12/15] s390: pgtable: also move pagetable_dtor() of PxD to __tlb_remove

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Message-ID: <dbcbf4c3-f86a-4414-be52-8ac02dae5b6b@bytedance.com>
Date: Mon, 6 Jan 2025 22:44:21 +0800
From: Qi Zheng <zhengqi.arch@...edance.com>
To: Alexander Gordeev <agordeev@...ux.ibm.com>
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Subject: Re: [PATCH v4 12/15] s390: pgtable: also move pagetable_dtor() of PxD
 to __tlb_remove_table()



On 2025/1/6 22:35, Alexander Gordeev wrote:
> On Mon, Jan 06, 2025 at 09:34:55PM +0800, Qi Zheng wrote:
>> OK, will change the subject and description to:
>>
>> s390: pgtable: also move pagetable_dtor() of PxD to pagetable_dtor_free()
>>
>> To unify the PxD and PTE TLB free path, also move the pagetable_dtor() of
>> PMD|PUD|P4D to pagetable_dtor_free().
>>
>> But pagetable_dtor_free() is newly introduced in this patch, should it
>> be changed to 'move ... to pagetable_pte_dtor_free()'? But this seems
>> strange. :(
> 
> s390: pgtable: consolidate PxD and PTE TLB free paths
> 
> Call pagetable_dtor() for PMD|PUD|P4D tables just before ptdesc is
> freed - same as it is done for PTE tables. That allows consolidating
> TLB free paths for all table types.
> 
> Makes sense?

Ah, make sense. Many thanks to you!

Will do it in v5.

> 
>> Thanks!
> 
> Thank you!