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Wed, 19 Dec 2018 21:25:22 -0800 (PST) Date: Wed, 19 Dec 2018 21:25:21 -0800 From: Guenter Roeck To: Palmer Dabbelt Subject: Re: [PATCH] RISC-V: Add CONFIG_PREEMPT=y to defconfig Message-ID: <20181220052521.GA21363@roeck-us.net> References: <20181220014511.GA24845@roeck-us.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181220014511.GA24845@roeck-us.net> User-Agent: Mutt/1.5.24 (2015-08-30) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181219_212534_494215_3CEFB997 X-CRM114-Status: GOOD ( 17.37 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-riscv@lists.infradead.org, Albert Ou Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org On Wed, Dec 19, 2018 at 05:45:11PM -0800, Guenter Roeck wrote: > On Wed, Nov 21, 2018 at 10:58:05AM -0800, Palmer Dabbelt wrote: > > I don't remember who suggested this, but I was talking to someone at > > Plumbers about all the horrible bugs we've had lurking around in our > > port despite it still getting to userspace and they suggested that I > > enable CONFIG_PREEMPT in our defconfig as it'll help shake out more > > issues. > > > > This patch enables CONFIG_PREEMPT in the single RISC-V defconfig. It > > still passes my tests (ie, booting Fedora on QEMU). Maybe I'm too > > paranoid, but I still don't trust our port enough to just pull the > > trigger on this without at least accumulating some "Tested-by"s on it. > > > > Signed-off-by: Palmer Dabbelt > > I can only give you a > > Fails-miserably-for: Guenter Roeck > > Not the new defconfig itself, but the new defconfig plus a variety of > selftest options. I don't know what exactly is failing, but here is > my list of enabled selftests on top of defconfig: > > CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y > CONFIG_CRC32_SELFTEST=y > CONFIG_DEBUG_LOCKING_API_SELFTESTS=y > CONFIG_DEBUG_NMI_SELFTEST=y > CONFIG_DEBUG_RODATA_TEST=y > CONFIG_DEBUG_TLBFLUSH=y > CONFIG_DMATEST=y > CONFIG_GLOB_SELFTEST=y > CONFIG_OF_UNITTEST=y > CONFIG_PCI_EPF_TEST=y > CONFIG_PCI_ENDPOINT_TEST=y > CONFIG_PROVE_LOCKING=y > CONFIG_PROVE_RCU=y > CONFIG_RCU_EQS_DEBUG=y > CONFIG_STATIC_KEYS_SELFTEST=y > CONFIG_STRING_SELFTEST=y > CONFIG_TEST_BITMAP=y > CONFIG_TEST_FIRMWARE=y > CONFIG_TEST_SORT=y > CONFIG_TEST_SYSCTL=y > CONFIG_TEST_UUID=y > CONFIG_USB_TEST=y > CONFIG_USB_EHSET_TEST_FIXTURE=y > CONFIG_USB_LINK_LAYER_TEST=y > CONFIG_WW_MUTEX_SELFTEST=y > CONFIG_TORTURE_TEST=y > CONFIG_LOCK_TORTURE_TEST=y > CONFIG_RCU_TORTURE_TEST=y > CONFIG_RBTREE_TEST=y > CONFIG_INTERVAL_TREE_TEST=y > Update: defconfig+CONFIG_LOCK_TORTURE_TEST=y causes the hang if CONFIG_PREEMPT=y. Guenter _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv