linux-kernel - Re: [PATCH v2 RESEND] mm/mmap: convert all mas except mas

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Date: Mon, 25 Mar 2024 21:24:14 +0100
From: Helge Deller <deller@....de>
To: Andrew Morton <akpm@...ux-foundation.org>,
 Yajun Deng <yajun.deng@...ux.dev>
Cc: Liam.Howlett@...cle.com, vbabka@...e.cz, lstoakes@...il.com,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 RESEND] mm/mmap: convert all mas except mas_detach to
 vma iterator

On 3/25/24 19:53, Andrew Morton wrote:
> On Mon, 25 Mar 2024 14:32:58 +0800 Yajun Deng <yajun.deng@...ux.dev> wrote:
>
>> There are two types of iterators mas and vmi in the current code. If the
>> maple tree comes from the mm structure, we can use the vma iterator. Avoid
>> using mas directly as possible.
>>
>> Keep using mas for the mt_detach tree, since it doesn't come from the mm
>> structure.
>>
>> Remove as many uses of mas as possible, but we will still have a few that
>> must be passed through in unmap_vmas() and free_pgtables().
>>
>> Also introduce vma_iter_reset, vma_iter_{prev, next}_range_limit and
>> vma_iter_area_{lowest, highest} helper functions for using the vma
>> interator.
>>
>
> I assume Liam's earlier request still applies?
>
> : Helge,
> :
> : Yajun has changed code that affects parisc with this patch, which hasn't
> : been tested.
> : ...
> : Can you make sure that the expand_upwards() still functions on parisc?

Oh, I didn't noticed that request earlier.
Anyway, I now tested this patch on top of 6.9-rc1, and the kernel still
boots up nicely on parisc and as such expand_upwards() seem to work as before.
So, you may add:

Tested-by: Helge Deller <deller@....de> # parisc

Thanks!
Helge