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Tue, 15 Aug 2023 12:45:27 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Jann Horn Date: Tue, 15 Aug 2023 21:44:50 +0200 Message-ID: Subject: Re: maple tree change made it possible for VMA iteration to see same VMA twice due to late vma_merge() failure To: Liam Howlett , Andrew Morton Cc: kernel list , Linux-MM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: uh8n4zgiwjm8991tzao6wurgy7b5egf4 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: AC9F9180012 X-Rspam-User: X-HE-Tag: 1692128728-230509 X-HE-Meta: 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 1plNHLQy 6IM+QoX2LJuvcXfnifIp27doTRD7a+MwyerzALJd1KdxAlBnM75vllE16y4dk1ynTpxrZp6SsXgxZ0lRMBrncXwjNy8PwQnHiWItoIexlD7zsgBoYi+7WjLJgV9KYyuCTglZNR6m641qrS1oXAJwxY9x2qkQSrUu0VPBjgCV6HDDRApoADFlfHH+3BRUoYCoKWTLg/jSuvfw4jQwu3Qf139NrAC+nL+tKKJM/7fVBnp6M42AHpSLivkCAz6OJcfYoeKRhoOXCzopqPVPWOotqxpyq3OD3x0iuUrALOVpp40vVK7XvZo1JP/gozLUGwezoQgkJBha8JS75eaqyrlbrhPNabSckZliRGdrEfAP6ZhcZC8Jqec7gdIguH0G4BLWJgzTv X-Bogosity: Ham, tests=bogofilter, spamicity=0.001087, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Aug 15, 2023 at 9:36=E2=80=AFPM Jann Horn wrote: > I think - my understanding is that the kernel will basically kill > every process on the system except for init before it starts failing > GFP_KERNEL allocations that fit within a single slab, unless the s/slab/page/