From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.28.82 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794182870; b=2QGQkW+ZOwVPj26oPGkVgGHra2P7ojgGkR2I31jlqCRLSgpUB3utjKKMFXH7YsvqRYfy sI4kjY05LgnYCMTXia7nwJopqjirmNQBw8bvi7U9qUFO3w8BtMnW168TYTOIxVxI0ulLv Mt6NYV4/15kj0g/78q/MYFs9h4vXFJUrAVRxHsvp7P5d8QPySDmH2ZCYIOp3vjpQs6pUJ JtOlG9f4jV/x4Vc0TGxcBp2qokWBymD0hxsc/zoqH+crptNMnbq1itSKDATnIAj9f6dWY 0hOl9hWkZDC62+eC2buS/ZTulIajuO1IEmScIV9bczJKWA1W66h+H/9/JMPJbk08H5g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794182870; h=DMARC-Filter:X-Alimail-AntiSpam:Received:Date:From:To:Subject:Cc: Message-Id:MIME-Version:Content-Type:Content-Transfer-Encoding: X-Mailer; bh=tuLjWHT7O7Uhmb/X83BwnDETIrTG37q5Rvks1VNUKQI=; b=vm8NftYmft+Stf4hBYheqOTtZ3LAoFzz/2BGc/gl8MJOCgQhJHnKwaDPzKFwGawKuC+Q 5LMPH4CyEXK55448UCLqh5vMTXHawFB0Cu+nqzdhw3Pvc25Auf/FCLOKdzOABqOAtrm2d rNbp9MDAWaz8Q3Wy6ks0th3QiLLzGyqOiaMi12uuYX5DhHD9lvESy/zLkSSUsvf9CESsY 8/4uMDymtNQVOhTa7g07XIoXpXHoNc4OSKE2wJkl5VhnGAdj15s3PRs3TuyeaNq/CtlKf 3kEaz6IG06rllFcYXasrraSAYsCRXhEhJJnBPHaEOV60diqQXCj4iBc1WWz9+Ao6iyg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none header.from=e16-tech.com; spf=pass smtp.mailfrom=e16-tech.com; arc=none smtp.remote-ip=115.124.28.82 Received: from out28-82.mail.aliyun.com (out28-82.mail.aliyun.com [115.124.28.82]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30D74606A31C for ; Mon, 9 Nov 2026 00:07:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 30D74606A31C Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=e16-tech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=e16-tech.com X-Alimail-AntiSpam:AC=CONTINUE;BC=0.1487254|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_news_journal|0.0391081-0.000991383-0.9599;FP=16572315342230904156|0|0|0|0|-1|-1|-1;HT=maildocker-contentspam033025068124;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=2;RT=2;SR=0;TI=SMTPD_---.jzgZnlg_1794182859; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.jzgZnlg_1794182859 cluster:ay29) by smtp.aliyun-inc.com; Mon, 09 Nov 2026 08:07:40 +0800 Date: Mon, 09 Nov 2026 08:07:41 +0800 From: Wang Yugui To: linux-raid@vger.kernel.org Subject: panic for md ddf (14disks/raid6) on kernel 6.6.161 but not on kernel 6.12.115 Cc: wangyugui@e16-tech.com Message-Id: <20261109080740.EF23.409509F4@e16-tech.com> X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.83.11 [en] Hi, I noticed a panic for md ddf(14disks/raid6) on kernel 6.6.161, but not happen on kernel 6.12.115. Call Trace: percpu_ref_kill_and_confirm+0x39/0xc0 __mddev_suspend+0x5c/0x1e0 ? __kmem_cache_alloc_node+0x1bb/0x320 ? _kstrtoull+0x3b/0x90 raid_disks_store+0x4a/0x190 md_attr_store+0x84/0x100 kernfs_fop_write_iter+0x13b/0x1d0 vfs_write+0x2bf/0x3e0 ksys_write+0x63/0xe0 do_syscall_64+0x62/0x90 Do we need some backuport for kernel 6.6.y? any advice please. Best Regards Wang Yugui (wangyugui@e16-tech.com) 2026/11/09