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Tue, 02 Jul 2024 13:38:00 +0200 Message-ID: <364b65a6-8717-4da3-aca4-8f8c847ad6a2@web.de> Date: Tue, 2 Jul 2024 13:37:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: zhang.chuna@h3c.com, linux-mm@kvack.org, Andrew Morton , Zhang Zhengming Cc: LKML , berlin@h3c.com, jiaoxupo@h3c.com, shaohaojize@126.com, wang.yuI@h3c.com, zhang.zhansheng@h3c.com References: <1719903369-35385-1-git-send-email-zhang.chuna@h3c.com> Subject: Re: [PATCH] mm: fix kmap_high deadlock V2 Content-Language: en-GB From: Markus Elfring In-Reply-To: <1719903369-35385-1-git-send-email-zhang.chuna@h3c.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:jKaQcRj1eCOQIm7UXp8deZuShjOvY7aDgonKc4BYvqTKVjB13Go Z/QgoljEKDusxBXBpanbF/ic413wBqq6BIuSP24TWXFp4qvymd9C6yAHggTtiCdpAI+Mb4p EZtM9gvB3h7hSIIgYZkkfiQ1mqJ+BGE9hpTmSmpBKhyJ3rHFeuMk+YxPB462Prayg7V3uh5 QHDvknFw1lqRfQyQxaUUQ== UI-OutboundReport: notjunk:1;M01:P0:sdT7kVaeu3o=;OYu22aOgxpB3EiposwZg8VcvJVG w44AW66M92gVkgmYNLlVgknXyk3CNW25cpu/Nz2M3pQFEmfTXK+c6O3BdJPn4yb4sFHkfdUG3 2Y2DKJdbO7yxOIB09UitfrJ3x+2H6lssBzkfCesroeEVJu3M9VVB5B+ce+UFXWDb3Uwvij+5x q7UfLv6mZD1l1g/oWEHLpSrx0giY54Wce6S14td36dF+vf3qdY0S4doQ8w5xo0DIxSBZXy3ae c9yJXQ4nMbzmWb1mVEl//OqA7ZE858+84CgQhA4jG5gKnZSbN4SvJ6kE4yvpPrqj+N4lJVmnJ w5H7ZBrIhEeif7y7NLyuC2bd6rjLk45MYCAskcxerFBzLSdit8hG7wA2BkpOW09N/oygW1a8+ QTIolYDE7lC0D4KVJbecZY4nUkgfzPBhXCFek/TaBlrnrjqg++d7RgjUY+iR7N0/K2tdQKnsK nkp+gNJyVnl2akSdyapYbqJi0hVSisidSGM4YqTmvsCyfLy4N4faKe5cd5rHjS+6LJ/H/6R0A oQgRAqo7lkKypEnuXdg3PRzxSQe9WxhNtB0h7urehbFlY/T21ZUZxtTULps5FCKv21liUsJcA Q03C8Sz0em3BXgU5fyd8OOLvuo9kPAl2lSiJJHN9VX6uBSdu8ujEOAtDr24TQ+iBr94xldqu/ AXifkNalHGrFTXeWhlXynn3UUHDecunWykNXsZP9L+/QTiPYAyJSEkgvWK90nF2O8JKu7tOS1 DgJpaXICmVFUsKLZNvlanE+rO7RJIK7C8bLhI/r31GaXi54pD0Y8XZRFO0mJ5/g2I8yMkXQtb d5XPRWcZ4eCfHyh+lm/5yv6Z4OnvUl8SUje1e+VXHp68c= X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: D41AA80015 X-Stat-Signature: odwz7gthrchahahjwa898gfabrekw7d5 X-HE-Tag: 1719920291-128176 X-HE-Meta: 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 sxgaZ1su AUtGPUeceJCQ4oP+NnWgkCw6qsBGEtxm9h6AA59nz+aUSjh1/VYacX9+g2Z0Acecl+L+tpZ8ZKE/STD2Hodz2F/2LbG/6it+zbM5M93vnP/WJ565RYKvz0zLkWzpVHnO4RiQ1BKxuUbSc2NQ0LlNsVYatWciQg+jgsLM2gNPEjt8WicRKuLpGNXMnmAKmWT0e7ayH1zjdoUlnlobdro1xzV9/hHQzOsNPB+TVRWtbbdZh1l7OmjI7ZlyQkc6udXK4/h3Y6Js2yNjDW53e8RRE5gEwk5zwzY3Acv4U84rVzjw9CgJlufKd3id3nvNrmS1eoIs05Dp7mzzxBtKXUS8TjMijySItt+4fn1FV X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: =E2=80=A6 > this is some deadlock condition. I think it's necessary to give > kmap_lock before call flush_tlb_kernel_range. =E2=80=A6 How do you think about to improve such a change description another bit? https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do= cumentation/process/submitting-patches.rst?h=3Dv6.10-rc6#n94 Will the tag =E2=80=9CFixes=E2=80=9D become relevant here? The version identifier should be specified at an other place in the messag= e subject. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do= cumentation/process/submitting-patches.rst?h=3Dv6.10-rc6#n668 Regards, Markus