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b=nKbp0tikNz9cHqTQsUNTiVm08JCp0gVeXxTbxWur61UQyg3WtGaOpohGDd6s/y7Z3 ZnuwtK8eylQDGefKyEv03T2+UtutBIOS9k82FoLHMeiNOvOVimuvRKVoWBhnEn20oH E5z+pdhcfRtTz58G12rgvz1gtHva6r1wZ5yIn16DWAprc1TCk9e5f+S7r7LMNMjTHa 2Q0fsGlz0boe8NpUN6Ds6vaAN+Z99RiG7h6XIDLQCN3GtzMrg95u/BNAzLvBvPXMy6 3AVmfDK3p+Qa2Sjrz61SDOEsWcxrLouEUPs5FPq06yBhSPhNgUzVQtt/qBJcK8pL8g Ljv2XJ1QO550Q== Date: Fri, 13 Mar 2026 15:40:14 +0000 From: "Lorenzo Stoakes (Oracle)" To: Mike Rapoport Cc: Chunyu Hu , akpm@linux-foundation.org, david@kernel.org, shuah@kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, surenb@google.com, mhocko@suse.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev Subject: Re: [PATCH 0/4] selftests/mm: skip several tests when thp is not available Message-ID: <68b17560-3033-472c-9638-a2e2058529f8@lucifer.local> References: <20260312114027.634559-1-chuhu@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: DF48240013 X-Stat-Signature: xxw8h1kp1yru36dxtbor4iituoa5aju5 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1773416421-105010 X-HE-Meta: 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 7Vat4ZNL ROuByjulCdXiUpro93o5xrqcTe9tU+SiU63R0dLsaN6Um2OGZteBcz74MPOAcEO5zqwOp/JscaOl7lTOkoBYHb/629wwg1uHOaiahbyebwGaDJq83fBpdSgbP3ufX1z1lsVd45vc09/Sr9n2vQIK8OY/4rAmwS0QOpe3UTnnkWJTnCEFMjKVBe/BoJMH8xWYS3aN0ssveS/5Po9Aujj47L8HIAw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Mar 13, 2026 at 05:19:20PM +0200, Mike Rapoport wrote: > On Fri, Mar 13, 2026 at 08:26:02AM +0800, Chunyu Hu wrote: > > On Thu, Mar 12, 2026 at 04:03:59PM +0200, Mike Rapoport wrote: > > > On Thu, Mar 12, 2026 at 07:40:23PM +0800, Chunyu Hu wrote: > > > > There are several tests requires transprarent hugepages, when run on thp > > > > disabled kernel such as realtime kernel, there will be false positve. > > > > > > I presume that when THP tests run on kernels with THP disabled they fail > > > and it would be a false negative rather than false positive. > > > > This is an interesting point. I'm not naitive speaker. I just learned > > from AI. It really matters what we define as 'postive'. I presume 'postive' > > is we run selftest and got a failure report, that's postive, not thinking > > as it's thp disabled kernel and a 'pass' is postive. > > I think that a passing test is "positive" and a failing test is "negative". > So a test that fails because of misconfiguration is a false negative to me. (Ostensibly native speaker here :P) Yes. False positive = the test passed when it should have failed. False negative = The test failed when it should have passed. Cheers, Lorenzo