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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id 69sm11862264qkk.106.2020.01.28.04.30.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Jan 2020 04:30:14 -0800 (PST) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Date: Tue, 28 Jan 2020 07:30:13 -0500 Subject: Re: [PATCH V12] mm/debug: Add tests validating architecture page table helpers Message-Id: <0C97A195-CBF2-43EF-88A0-7683BB9EF892@lca.pw> Cc: Anshuman Khandual , Linux-MM , Andrew Morton , Vlastimil Babka , Greg Kroah-Hartman , Thomas Gleixner , Mike Rapoport , Jason Gunthorpe , Dan Williams , Peter Zijlstra , Michal Hocko , Mark Rutland , Mark Brown , Steven Price , Ard Biesheuvel , Masahiro Yamada , Kees Cook , Tetsuo Handa , Matthew Wilcox , Sri Krishna chowdary , Dave Hansen , Russell King - ARM Linux , Michael Ellerman , Paul Mackerras , Martin Schwidefsky , Heiko Carstens , "David S. Miller" , Vineet Gupta , James Hogan , Paul Burton , Ralf Baechle , "Kirill A . Shutemov" , Gerald Schaefer , Christophe Leroy , Ingo Molnar , linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org To: Mike Rapoport X-Mailer: iPhone Mail (17C54) 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: > On Jan 28, 2020, at 7:10 AM, Mike Rapoport wrote: >=20 > Aren't x86 and arm64 not decent enough? > Even if this test could be used to detect regressions only on these two > platforms, the test is valuable. The question is does it detect regressions good enough? Where is the list of= past bugs that it had found? It is an usual deal for unproven debugging features remain out of tree first= and keep gathering unique bugs it found and then justify for a mainline inc= lusion with enough data.=