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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id s1sm7274932qkm.84.2020.02.02.03.26.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 02 Feb 2020 03:26:30 -0800 (PST) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH V12] mm/debug: Add tests validating architecture page table helpers Date: Sun, 2 Feb 2020 06:26:29 -0500 Message-Id: <2C4ADFAE-7BB4-42B7-8F54-F036EA7A4316@lca.pw> References: <473d8198-3ac4-af3b-e2ec-c0698a3565d3@c-s.fr> Cc: Anshuman Khandual , linux-mm@kvack.org, 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 , 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, kasan-dev In-Reply-To: <473d8198-3ac4-af3b-e2ec-c0698a3565d3@c-s.fr> To: Christophe Leroy 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 30, 2020, at 9:13 AM, Christophe Leroy wr= ote: >=20 > config DEBUG_VM_PGTABLE > bool "Debug arch page table for semantics compliance" if ARCH_HAS_DEBUG= _VM_PGTABLE || EXPERT > depends on MMU > default 'n' if !ARCH_HAS_DEBUG_VM_PGTABLE > default 'y' if DEBUG_VM Does it really necessary to potentially force all bots to run this? Syzbot, k= ernel test robot etc? Does it ever pay off for all their machine times there= ?=