-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 8/31/15 8:06 PM, Chris Mason wrote: > On Mon, Aug 31, 2015 at 07:32:09PM +0200, Stefan Priebe - > Profihost AG wrote: >>> Am 25.08.2015 um 15:51 schrieb Chris Mason <clm@xxxxxx>: >>> >>>> On Tue, Aug 25, 2015 at 11:00:30AM +0200, Christoph Hellwig >>>> wrote: I think this is btrfs using a struct block_device >>>> that doesn't have a valid queue pointer in it's gendisk for >>>> ->s_bdev. And there are some fishy looking ->s_bdev >>>> assignments in the code which I suspect are related to it: >>>> >>>> fs/btrfs/dev-replace.c: if (fs_info->sb->s_bdev == >>>> src_device->bdev) fs/btrfs/dev-replace.c: fs_info->sb->s_bdev >>>> = tgt_device->bdev; fs/btrfs/volumes.c: if (device->bdev == >>>> root->fs_info->sb->s_bdev) fs/btrfs/volumes.c: >>>> root->fs_info->sb->s_bdev = next_device->bdev; >>>> fs/btrfs/volumes.c: if (tgtdev->bdev == >>>> fs_info->sb->s_bdev) fs/btrfs/volumes.c: fs_info->sb->s_bdev >>>> = next_device->bdev; >>> >>> We've had trouble with this in the past, I'll take a look. >> >> Any news? > > Haven't been able to reproduce yet, I'll try again in the morning. I'm unable to reproduce it as well and I'm hearing about people hitting it in different forums. Can you describe your storage configuration? There's a gendisk without a queue sneaking in somehow. There are some spots in dm where the mddev gets a new queue assigned to it but the old queue associated with the gendisk is left behind so that's not it. If you're able to reproduce it reliably with this configuration, that's certainly interesting. I'm wondering if the case is that vgcfgbackup is iterating over devices and causing something that might not have been previously scanned to be scanned and added to the btrfs device list. Are there any messages above the oops indicating when a device is added? Could you post your complete dmesg somewhere? Thanks, - -Jeff - -- Jeff Mahoney SUSE Labs -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.19 (Darwin) iQIcBAEBAgAGBQJV8gJ2AAoJEB57S2MheeWyEP4QALvIXZGIqkXhUBZEYvLC+rnD Q79chLpbt8x52xtFoav78i3nG24SMXV5NbhFlGNnr6xt/CQtKSzBuDyJ+nigkyy+ bTtHbwkMqNddrqKJ3r928nKwz1IOyU4J58l7hGyC0owSA3mDxyI7+yS16OXFwc1S 6lxtV4ljf6nqobA+rVyC3n3BU6CF1aL45V2FpM/m4OHL/Xqv97Xg2tGlysnk8RPD dRvz5fs2T75B0eBsK4xWHKEgKKWdVYaKqlySRXUJQpnNJTlJltW5HzL8RnR47brt LLaOCD4jcLlEtGhTi6wEN6BlEYbgDx/1yjQs5zxLG0vbTUi5ZcTeT82d5+Hh4WMD HyLfE4pwFUZXTHvcIoQ51wPLS/tWMVJXnleQKBrDT+WcsKPr5yuwUZpwfrOBfjol Qan13/mIcmvFsz2yVWnoZJWU5osnhe+frBsVFlIFLNXp50QVXk+WvruPDOsoY2eQ J8L20LhY5e0dgJseXWkAAy68mJ0/rrkX0iAdiED/WEsBdjy7QuOomJqPyQQEPplm d+tIkDR77Biajket2tNEXK1m14f7QvFUFojI0NwegcmZT3iJ7BBWD6wjxIvh3KqE LqHIcTaECU9XSg9x9E3N416hCbclC9xeosxaJB1iN+EvpaD7CBA+V+onkNMN6Fu4 J0aVUYlZuLcqkEs/BuNL =BRtR -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
