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

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Message-ID: <Z3vqHXdwIMBVQ2GT@li-008a6a4c-3549-11b2-a85c-c5cc2836eea2.ibm.com>
Date: Mon, 6 Jan 2025 15:35:09 +0100
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Qi Zheng <zhengqi.arch@...edance.com>
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Subject: Re: [PATCH v4 12/15] s390: pgtable: also move pagetable_dtor() of
 PxD to __tlb_remove_table()

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?

> Thanks!

Thank you!