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[193.77.20.28]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-adec81593ecsm100669266b.18.2025.06.13.02.31.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 13 Jun 2025 02:31:08 -0700 (PDT) Message-ID: <38c007e1-fd3f-4f5c-9f54-ad380d7071ad@gmail.com> Date: Fri, 13 Jun 2025 11:31:07 +0200 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: Stuck in CHANGING_BG_TREE state after interrupted btrfstune --convert-to-block-group-tree To: Qu Wenruo , linux-btrfs@vger.kernel.org References: <99814fd5-3f80-4d08-af7e-468f7c8885df@suse.com> Content-Language: en-US From: Tine Mezgec In-Reply-To: <99814fd5-3f80-4d08-af7e-468f7c8885df@suse.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Qu, Your patch did the trick, the conversion completed cleanly, the CHANGING_BG_TREE flag is gone, and the incompat BG_TREE bit is now set. Mounting the 11‑device volume takes ~5 seconds instead of several minutes, so everything is back to normal or even better than before. Thanks a lot for the quick diagnosis and the fix. One thought: the optimisation that skips the full extent‑tree scan clearly helps in the common case, but when it backfires the only recovery path is recompiling progs with a patch. Would it make sense to expose a --full-scan (or --no-fast-scan) switch in btrfstune so an interrupted conversion can be resumed with stock binaries? Either way, I really appreciate the help. Best regards, -Tine