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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shuah Khan , Ujwal Kundur , Brendan Jackman , kernel-team@android.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, "open list:MEMORY MANAGEMENT - USERFAULTFD" , "open list:KERNEL SELFTEST FRAMEWORK" Subject: Re: [PATCH] selftests/mm: fix division-by-zero in uffd-unit-tests Message-Id: <20251114143909.14ecee31b88f179bc2858e30@linux-foundation.org> In-Reply-To: <9d30836b-9ddb-4432-aa39-85e32c2ea645@kernel.org> References: <20251113034623.3127012-1-cmllamas@google.com> <4a60a703-d9c2-46a8-83b4-a7ecff7f6ba2@lucifer.local> <20251113153205.6507ecb308e7d09362905da7@linux-foundation.org> <9d30836b-9ddb-4432-aa39-85e32c2ea645@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: jbuqjxiotmjbh5xkom7xgw7rpzsmghzs X-Rspam-User: X-Rspamd-Queue-Id: 73A4120005 X-Rspamd-Server: rspam01 X-HE-Tag: 1763159951-627398 X-HE-Meta: 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 DIGtd5cU u7JMkMB53MkdxC/lOec7poYMUZEWXMlf9HHmb0RS406pHIMm+5beN6rQIt30k2HCzzuPqrui1r+wsXLbZhoUadmRH7ppPW6JZ0llOTfImlZjtiETXbVeam6O47WjUMLkvpcmFpcjBFxX0ur5gtEwf7rG/d7t8OR5GAYK5jBkNI2lJ8VDqfzaR+1IKkXXbWlYnGIKF9RywniTgeUM9CvHQTnEk2rYfEoZjlCHQf6bKFmX+nqkwYuRieriopdRNgr8CS9GoxYOesRGaw/BCaHAD4qEctm0Ex1onAxqLD+VftYqGhh6vYUKyBIN320bES+Fv2C5O353yMRG9P9VFc3vx3YDVnw== 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: On Fri, 14 Nov 2025 09:11:40 +0100 "David Hildenbrand (Red Hat)" wrote: > >>> Oops, I keep getting confused about this Cc stable thing. Please let me > >>> know if a v2 dropping the tag is needed. > >> > >> No need, Andrew should spot the objection and drop the tag :) > > > > I actually add cc:stable tags to selftests fixes! > > > > Because why not. Why leave people running known-to-be-buggy code when > > our backporting processes are so well-functioning and lightweight? > > > > I'm not getting the objection? > > I thought we were so inconsistent on that that it ends up being a wasted > effort to even try taking care about stability of selfests in stable trees. Oh, I try to be vigilant about it. hp2:/usr/src/mm> git log tools/testing/selftests/mm | grep stable@|wc 44 89 1462 I pass selftests patches through the same brain algorithm as I do everything else, shrug.