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AJvYcCXd/5OoLPJiTrMkrZTr4HIfUT8qrwaxVuIYHCOE6Nc61fO2/MJgm23VZGiQN7DrUY6UaRL7nFKWgA==@kvack.org X-Gm-Message-State: AOJu0YyaBD8aiE2Vxn4mmADNJ3m0JExDGxYQx4AYTwhWAFS5xmasi/7f ZiJdx7b44u5tpdQBW4h50AL/bdEWzCaVPZ4q2xKzEQJG54Tx3kJ6y19dNIWUNBirs53H/aUh7zF XTuzl9dgQAv4el7TX0qDz7awdZjM= X-Gm-Gg: ASbGncsDWLpkKyGobamlEhZIOYeYSStcniXFTxu8sbVJ8ZTPFVyC4A1//W7dozlTFSb Tr0uJCV4iu4y3WwxVEVKKu0At7yVo+6A4PALvo/BiflB6V5NPqj5nExNT83wNdswiE7fAKuSjj9 YqL1cq+RkiOLaR972K8iB4xFue X-Google-Smtp-Source: AGHT+IFx4BHh+7k57pV1IO7HJG/9YO1INsBS9KA9AYwDRL4XjQGlSuQ8U09WiopwmrGJ0LtzI4DSAZylVangziUWRdE= X-Received: by 2002:a05:6214:1d04:b0:6e8:8e10:424d with SMTP id 6a1803df08f44-6ed2395e92emr10090536d6.41.1743018219414; Wed, 26 Mar 2025 12:43:39 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Nhat Pham Date: Wed, 26 Mar 2025 15:43:28 -0400 X-Gm-Features: AQ5f1JpVyOQSMRIQ6FS-EzhkbRB3pXiaalELf8V-_Y0ZZZMSDxIlLI7kDWjopvQ Message-ID: Subject: Re: Linux6.14-rc5 BUG: spinlock bad magic in z3fold_zpool_free To: ffhgfv Cc: "vitaly.wool" , linmiaohe , akpm , linux-mm , linux-kernel Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 8F43812000E X-Stat-Signature: cfuzg76458d8zzxaf77sqbmhk6pxxbia X-Rspam-User: X-HE-Tag: 1743018220-327192 X-HE-Meta: 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 rwP4Gv5d kXUk8uYJxiE1iRFF108bW470tptUibNxoPrGwTsBt2TRYBwDmkWUhbbdmcNq/IHiCsatwii6UP1EtfosXDEFmEgbwcY5IoEneW0KKLWPMsT5PJaPF9DaKh3G4/3DYgIfnxLcw9R4kMiILTiEWE3t2eYAcOvH4SevTwrJAlvU9Le4oJ7kAQ9ogtabULPm8x/u5gZrxrKhDxn8a+t45pQ9omY07y10+Tnt/0CCayq+HGBftBLdYUuMZInepwEZszD/cUGUJey4WkP+SGyacNJJI5WEk21CvEdLwzS4pRKe7jqfJa8f8/ZYZAlZPcEwWGwMZxxqdKRSIw7z5uSKiB3FuCGB9bAfWxCzTayKUVDPU+lGmd+ZONROD3BST4AhmkmTwzJOhK04yaz5IWdYuzXwOpiMDa/S4lqcMGJ+a90l+rakT59sezHrKSBuN3FDO+RGnwhBYbOSQ7+LFKVls9gcHFsJW/ewr5cazO6f7 X-Bogosity: Ham, tests=bogofilter, spamicity=0.262319, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Mar 26, 2025 at 10:32=E2=80=AFAM Nhat Pham wrot= e: > > On Wed, Mar 26, 2025 at 10:11=E2=80=AFAM ffhgfv wro= te: > > > > Hello, I found a bug titled " BUG: spinlock bad magic in z3fold_zpool_f= ree " with modified syzkaller in the Linux6.14-rc5. > > If you fix this issue, please add the following tag to the commit: Rep= orted-by: Jianzhou Zhao , xingwei lee , Zhizhuo Tang > > Please stop using z3fold :) We already removed it upstream. To clarify a little bit - we've found that z3fold is buggy (for a very long time), and does not outperform zsmalloc in many of the workloads we test on (both microbenchmark and real production workloads). We've deprecated it since 6.12: https://github.com/torvalds/linux/commit/7a2369b74abf76cd3e54c45b30f6addb49= 7f831b and will remove it altogether: https://lore.kernel.org/all/20250129180633.3501650-1-yosry.ahmed@linux.dev/ Perhaps Vitaly can fix the issue for stability's sake (or in case there is a reason why you MUST use z3fold)? But I strongly recommend you experiment with zsmalloc :)