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a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784039562; bh=5/zj5P3kBIK7G1tNe4Uj26Vul5lA6c8YvgqeoVqk8Lk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZZ4dqq/NLYqzSBAfNqEuQPntKdDEgDfavpxCNEIReUT2xcPV9tGz8TIGmXkdJmtmm nyaIZjSVagD1HUrgFxm/UBjbTlNEYIgP3rIl7n0meCQ2szIcUNjZ05f8aKXcZ86S0D 7ag9fFiulW78YngOCtCIvNf7WTvqyLFRunseiNJS4CYzTKUeigxoHPJAVrZOVK1Bhy fSu+hxitS/iMtDtvBRaZTd8QJs+aKxwSODjhTa7lxZPi3Z6CdeZoT5d0BH7jEywOa0 +Cs5jPEytY5O5UGJ7R28senYzRux/PPPxGzWAJ8i/mDGmX5hcgK4/im3g5oGEeqdAF 66QJGXNFmnKxA== From: SJ Park To: SJ Park Cc: Andrew Morton , stable@vger.kernel.org, Brendan Higgins , David Gow , Fernand Sieber , Leonard Foerster , SeongJae Park , Shakeel Butt , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/5] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races Date: Tue, 14 Jul 2026 07:32:34 -0700 Message-ID: <20260714143235.100843-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260714135236.92699-1-sj@kernel.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: F1C391C000D X-Rspam-User: X-Stat-Signature: bmkro9s9zo47oim3yjdutafmwfoampjg X-Rspamd-Server: rspam03 X-HE-Tag: 1784039563-298787 X-HE-Meta: U2FsdGVkX1/9Z8GKMe3TcipKmHQUJbMxh9mQvxQaHWP26v1630pACqwIB2Ya3PZWerkwDHINwlD+kUaKsGCk6pPhCBmi0ZB+w59XwfnYwnlWJH+QNImGkeTM76x13T2JNHMJwNliRJMelr0rhvhmp100vCpleX9kENuFOMdtc1r0SKubaQfGbxpv94WAHYIRcUdqNyhgil3umIxcAPVrwKpTLxxWpWpn+m+ODqpjda2YT6a7UHN7k+9pK8TOSHGagXORv6AQvG3iGNvfEKm5GOvdVvWGl3vXsDN3QoO04F8Y4rIfj2GonlSqV6CbXwSd7CduQu7zPwtiUHOjTqrbQ8o2DIwqJIQt6rK6dl5BjwwUpiVmOpLfhLQR9GL44ooDp+kVH74G8u7kEh/pqt4lR50LqzkgUZfiW0+xP9P0DdD3p14HfVAev3NjE6HkxxkigI6c2s9vOFMvKPBzIH4cA9efdPLoaENhkjKVp/qFcOXDksZyqi+Yim9TphXSASV4+3Zgn/Z0MgT1uYgjWWSpKjUBmJmjbr1lroBb0B1qGyWOwDv8jFvXS7ksS5cBFUCKvDlax41uIVE01WsdOqzd7q8MO5XSBlAAksZ6fgSUBpybdf8/izAAnVzeeWlDFFmrBPuOdWw0BQJkNN5KcKhFNWmoyBNpzG3Hn9X22yQhoHvSMGCUHC96Y3X8BCQWDkJmE3BoMPUCz+J9Yh4oLNNKG2dmmO18FTfC/HTe5+4ud8VfLoF27MB/Ij3rOe/cemyJB2XzX/BWz8ZbIskDHlsQ4j+LoSQ3qJvRx16U0oEFSIgk0Orzj76keg9ijAWUVeTcXxH6rdybBlwi0izCsbLASjkv3PvBez5uUrNKTqIVUKslY5fhWRBGqnm1u9uuSwCk/ctUXP/r6HsBhbadsN+jhBmbR2mTwZmCX0z8SMK/FCzSogX1wjILdNiTR+fKKcZipE2AstA4tZvGroIpeW3 u7ZLrSwf 1hCIpDSsd/KM6lGWmHoeprFVJSDicS8HGRSNuyf/nPuuHmld9rLySUqaukQSSOSE7QiK1ifQTf2CkNbI7S0st5wfTYQ6GaJkzwEq/fWa8wWEB7DhBIikVlp5wK8Xv1amQ8r8XUkw0OvRFWwXE5hHA7+Ruvw1Qn8Zr46w1TGvxZjXuTN7pXDxWelx9B971cgK/qa3IMDSqrAJHQgYYLpsjD0MGkyhPeI0kkojZLmDJYAFfvLc= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 14 Jul 2026 06:52:28 -0700 SJ Park wrote: > Sashiko found a few issues in DAMON that could cause infinite loop, NULL > dereference and monitoring results degradation. The first two sounds > scary but the infinite loop happens only under unreasonable user setup. > The NULL dereference is only in a unit test. Monitoring results > degradation is trivial since it is only best-effort, and those happens > from only unlikely races. Still those are bugs that better to fix if > possible. Fix those. Sashiko found one more bug that may better to be fixed together with this series. Also patch 5 mistakenly lacks its Fixes: tag. I will post a new version of this series with the fixes. Please don't pick this series into mm-new for now. Thanks, SJ [...]