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Ts'o" To: Pavel Machek CC: , , , Subject: Re: 5.0.0-rc8-next-20190301+: kernel bug at fs/inode.c:513 Message-ID: <20190304223232.GA6323@mit.edu> References: <20190304160255.GA6914@amd> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20190304160255.GA6914@amd> User-Agent: Mutt/1.10.1 (2018-07-13) X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:18.9.28.11;IPV:CAL;SCL:-1;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10019020)(39860400002)(136003)(376002)(396003)(346002)(2980300002)(189003)(199004)(103686004)(26005)(6246003)(4326008)(2906002)(229853002)(75432002)(88552002)(476003)(486006)(186003)(126002)(4744005)(356004)(6266002)(47776003)(11346002)(2616005)(446003)(5660300002)(336012)(1076003)(42186006)(8936002)(8676002)(36756003)(97756001)(76176011)(58126008)(305945005)(246002)(106466001)(52956003)(86362001)(54906003)(33656002)(46406003)(90966002)(6916009)(23726003)(50466002)(478600001)(26826003)(106002)(316002)(36906005)(786003)(16586007);DIR:OUT;SFP:1102;SCL:1;SRVR:BL0PR01MB4850;H:outgoing.mit.edu;FPR:;SPF:Pass;LANG:en;PTR:outgoing-auth-1.mit.edu;MX:1;A:1; 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On Mon, Mar 04, 2019 at 05:02:55PM +0100, Pavel Machek wrote: > > This happened on trying to sync filesystems with unison: > > Any ideas? > > Should I be forcing fsck soon? > Pavel > > [12717.827444] ------------[ cut here ]------------ > [12717.827465] kernel BUG at fs/inode.c:513! It seems unlikely that fsck is going to help. The BUG_ON in question appears to be: BUG_ON(inode->i_data.nrexceptional); This is an in-memory accounting variable which seems to be related to tracking DAX and shadow page entries --- and it seems very unlikely to be the sort of thing triggered by an on-disk corruption. Do you have a reliable repro for this? If so, the next step would be to bisect... - Ted