Re: [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()

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To: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>, linux-mm@xxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Lorenzo Stoakes <lstoakes@xxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, sidhartha.kumar@xxxxxxxxxx, "Paul E . McKenney" <paulmck@xxxxxxxxxx>, Bert Karwatzki <spasswolf@xxxxxx>, Jiri Olsa <olsajiri@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Kees Cook <kees@xxxxxxxxxx>
Subject: Re: [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()
From: Dave Hansen <dave.hansen@xxxxxxxxx>
Date: Tue, 9 Jul 2024 11:13:12 -0700
In-reply-to: <qje65pz4hj2rffrjszmkyofygfo63pgw2j66ldmm56v5zdy4gx@ufe7ydvmio7y>
References: <20240704182718.2653918-1-Liam.Howlett@oracle.com> <20240704182718.2653918-17-Liam.Howlett@oracle.com> <8fbb424d-a781-4e61-af7a-904e281eba8c@lucifer.local> <e5ldsusdn3som7wn2rw76wtrhnlrxk3vkyk3iyimh6qv3ptvwu@24zfmamllev6> <jn4owbmmjrthhmaene5lsnliou6lfoyrvn4cxs5mbmkvmd5qoo@banbwbsp3l7q> <qje65pz4hj2rffrjszmkyofygfo63pgw2j66ldmm56v5zdy4gx@ufe7ydvmio7y>
User-agent: Mozilla Thunderbird

On 7/9/24 07:52, Liam R. Howlett wrote:
...
> - The arch_unmap() call doesn't need to be that early anymore anyways
>   (mpx was dropped by Dave in 2020 git id ccaaaf6fe5a5).

Yep.  MPX is long gone and x86 doesn't do anything with arch_unmap() any
more.  Moving it around won't affect x86 at all.

References:
- [PATCH v3 00/16] Avoid MAP_FIXED gap exposure
  - From: Liam R. Howlett
- [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()
  - From: Liam R. Howlett
- Re: [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()
  - From: Lorenzo Stoakes
- Re: [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()
  - From: Liam R. Howlett
- Re: [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()
  - From: Liam R. Howlett
- Re: [PATCH v3 16/16] mm/mmap: Move may_expand_vm() check in mmap_region()
  - From: Liam R. Howlett

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