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([2600:8802:b00:9ce0:b09e:9199:95c4:55ec]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-246687af23fsm79304815ad.51.2025.08.25.17.43.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Aug 2025 17:43:53 -0700 (PDT) Message-ID: <7be35af0-d249-4910-8f67-309e111f8c08@gmail.com> Date: Mon, 25 Aug 2025 17:43:52 -0700 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH blktests] zbd/009: increase max open zones limit to 16 To: Shin'ichiro Kawasaki , linux-block@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, Bart Van Assche , Naohiro Aota References: <20250826002720.12222-1-shinichiro.kawasaki@wdc.com> Content-Language: en-US From: Chaitanya Kulkarni In-Reply-To: <20250826002720.12222-1-shinichiro.kawasaki@wdc.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 8/25/25 17:27, Shin'ichiro Kawasaki wrote: > The kernel commit 04147d8394e8 ("btrfs: zoned: limit active zones to > max_open_zones") introduced in kernel version v6.17-rc3 caused the > zbd/009 test case to hang during execution. The hang happens because > zoned btrfs requires the maximum active zones limit of zoned block > devices to be at least 11 or greater. The kernel commit applies this > same requirement to the maximum open zones limit also. > > However, by default, the maximum open zones limit for zoned scsi_debug > devices is 8. The test case zbd/009 creates a scsi_debug device with > this limit and set up zoned btrfs. Thereby it violates the 11-zones > requirement, which resulted in the hang. > > To avoid the hang, increase the max open zones limit of the scsi_debug > device from the default value 8 to 16. > > Suggested-by: Naohiro Aota > Signed-off-by: Shin'ichiro Kawasaki Looks good. Reviewed-by: Chaitanya Kulkarni -ck