Am Fri, 5 May 2017 08:55:10 +0800 schrieb Qu Wenruo <quwen...@cn.fujitsu.com>:
> At 05/05/2017 01:29 AM, Kai Krakow wrote: > > Hello! > > > > Since I saw a few kernel freezes lately (due to experimenting with > > ck-sources) including some filesystem-related backtraces, I booted > > my rescue system to check my btrfs filesystem. > > > > Luckily, it showed no problems. It said, everything's fine. But I > > also thought: Okay, let's try lowmem mode. And that showed a > > frightening long list of extent corruptions und unreferenced > > chunks. Should I worry? > > Thanks for trying lowmem mode. > > Would you please provide the version of btrfs-progs? Sorry... I realized it myself the moment I hit the "send" button. Here it is: # btrfs version btrfs-progs v4.10.2 # uname -a Linux jupiter 4.10.13-ck #2 SMP PREEMPT Thu May 4 23:44:09 CEST 2017 x86_64 Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz GenuineIntel GNU/Linux > IIRC "ERROR: data extent[96316809216 2097152] backref lost" bug has > been fixed in recent release. Is there a patch I could apply? > And for reference, would you please provide the tree dump of your > chunk and device tree? > > This can be done by running: > # btrfs-debug-tree -t device <device> > # btrfs-debug-tree -t chunk <device> I'll attach those... I'd like to note that between the OP and these dumps, I scrubbed and rebalanced the hole device. I think that would scramble up some numbers. Also I took the dumps while the fs was online. If you want me to do clean dumps of the offline device without intermediate fs processing, let me know. Thanks, Kai > And this 2 dump only contains the btrfs chunk mapping info, so > nothing sensitive is contained. > > Thanks, > Qu > > > > PS: The freezes seem to be related to bfq, switching to deadline > > solved these. > > > > Full log attached, here's an excerpt: > > > > ---8<--- > > > > checking extents > > ERROR: chunk[256 4324327424) stripe 0 did not find the related dev > > extent ERROR: chunk[256 4324327424) stripe 1 did not find the > > related dev extent ERROR: chunk[256 4324327424) stripe 2 did not > > find the related dev extent ERROR: chunk[256 7545552896) stripe 0 > > did not find the related dev extent ERROR: chunk[256 7545552896) > > stripe 1 did not find the related dev extent ERROR: chunk[256 > > 7545552896) stripe 2 did not find the related dev extent [...] > > ERROR: device extent[1, 1094713344, 1073741824] did not find the > > related chunk ERROR: device extent[1, 2168455168, 1073741824] did > > not find the related chunk ERROR: device extent[1, 3242196992, > > 1073741824] did not find the related chunk [...] > > ERROR: device extent[2, 608854605824, 1073741824] did not find the > > related chunk ERROR: device extent[2, 609928347648, 1073741824] did > > not find the related chunk ERROR: device extent[2, 611002089472, > > 1073741824] did not find the related chunk [...] > > ERROR: device extent[3, 64433946624, 1073741824] did not find the > > related chunk ERROR: device extent[3, 65507688448, 1073741824] did > > not find the related chunk ERROR: device extent[3, 66581430272, > > 1073741824] did not find the related chunk [...] > > ERROR: data extent[96316809216 2097152] backref lost > > ERROR: data extent[96316809216 2097152] backref lost > > ERROR: data extent[96316809216 2097152] backref lost > > ERROR: data extent[686074396672 13737984] backref lost > > ERROR: data extent[686074396672 13737984] backref lost > > ERROR: data extent[686074396672 13737984] backref lost > > [...] > > ERROR: errors found in extent allocation tree or chunk allocation > > checking free space cache > > checking fs roots > > ERROR: errors found in fs roots > > Checking filesystem on /dev/disk/by-label/system > > UUID: bc201ce5-8f2b-4263-995a-6641e89d4c88 > > found 1960075935744 bytes used, error(s) found > > total csum bytes: 1673537040 > > total tree bytes: 4899094528 > > total fs tree bytes: 2793914368 > > total extent tree bytes: 190398464 > > btree space waste bytes: 871743708 > > file data blocks allocated: 6907169177600 > > referenced 1979268648960 > > > > > -- > To unsubscribe from this list: send the line "unsubscribe > linux-btrfs" in the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Regards, Kai Replies to list-only preferred.
chunk-tree.txt.gz
Description: application/gzip
device-tree.txt.gz
Description: application/gzip
