linux-kernel - Re: [PATCH v10 07/18] mm: allow vma_start_read_locked/vma_start_read_locked

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Message-ID: <46163fb7-2bc2-456d-9e1a-02657293037a@suse.cz>
Date: Fri, 21 Feb 2025 12:27:44 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org
Cc: peterz@...radead.org, willy@...radead.org, liam.howlett@...cle.com,
 lorenzo.stoakes@...cle.com, david.laight.linux@...il.com, mhocko@...e.com,
 hannes@...xchg.org, mjguzik@...il.com, oliver.sang@...el.com,
 mgorman@...hsingularity.net, david@...hat.com, peterx@...hat.com,
 oleg@...hat.com, dave@...olabs.net, paulmck@...nel.org, brauner@...nel.org,
 dhowells@...hat.com, hdanton@...a.com, hughd@...gle.com,
 lokeshgidra@...gle.com, minchan@...gle.com, jannh@...gle.com,
 shakeel.butt@...ux.dev, souravpanda@...gle.com, pasha.tatashin@...een.com,
 klarasmodin@...il.com, richard.weiyang@...il.com, corbet@....net,
 linux-doc@...r.kernel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 kernel-team@...roid.com
Subject: Re: [PATCH v10 07/18] mm: allow
 vma_start_read_locked/vma_start_read_locked_nested to fail

On 2/13/25 23:46, Suren Baghdasaryan wrote:
> With upcoming replacement of vm_lock with vm_refcnt, we need to handle a
> possibility of vma_start_read_locked/vma_start_read_locked_nested failing
> due to refcount overflow. Prepare for such possibility by changing these
> APIs and adjusting their users.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> Cc: Lokesh Gidra <lokeshgidra@...gle.com>

Reviewed-by: Vlastimil Babka <vbabka@...e.cz>