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Mon, 12 May 2025 04:47:10 -0700 (PDT) Date: Mon, 12 May 2025 13:47:08 +0200 From: Petr Mladek To: Ryo Takakura Cc: john.ogness@linutronix.de, Jason@zx2c4.com, gregkh@linuxfoundation.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, lkp@intel.com, oe-lkp@lists.linux.dev, oliver.sang@intel.com Subject: Re: [PATCH] rslib: Add scheduling points during the test Message-ID: References: <20250510013515.69636-1-ryotkkr98@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250510013515.69636-1-ryotkkr98@gmail.com> On Sat 2025-05-10 10:35:15, Ryo Takakura wrote: > The test has been prone to softlockup but stayed unnoticed because > of the printk calls during the test resets the soflockup watchdog by > calling touch_nmi_watchdog(). With the commit b63e6f60eab4 ("serial: > 8250: Switch to nbcon console"), the printk calls no longer suppress > the softlockup and warnings can be observed more evidently that shows > the test needs more scheduling points. > > Provide scheduling points by adding cond_resched() for each test > iteration on their up to/beyond error correction capacity. > We should add here: Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-lkp/202501221029.fb0d574d-lkp@intel.com > Signed-off-by: Ryo Takakura Otherwise, it looks good to me: Reviewed-by: Petr Mladek Thanks a lot for nailing it down. Best Regards, Petr