Re: [bcachefs] checksum error probably after switching to crc64

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On Thu, Sep 22, 2016 at 01:14:45PM +0200, Marcin Mirosław wrote:
> W dniu 22.09.2016 o 12:58, Marcin Mirosław pisze:
> > Hi!
> > I'm at:
> > commit b7cb7779de9609899fa53f7bab4e3cee69ac1f7e
> > Author: Kent Overstreet <kent.overstreet@xxxxxxxxx>
> > Date:   Wed Sep 21 17:38:38 2016 -0800
> > 
> >     bcache: fix an ordering issue in btree_interior_update code
> > 
> >     Also a bunch of refactoring
> > 
> > 
> > Steps:
> > # bcache format --discard  --compression_type=lz4 /dev/system10/bcache
> > (underlaying devices does not support discard)
> > # mount & use fs
> > # echo crc64 > data_checksum
> > # echo crc64 > metadata_checksum
> > # use filesystem
> > After sometime I'm getting:
> > [ 6444.192279] bcache (dm-11): IO error on dm-11 for checksum error
> 
> After some trying to read files dmesg says:
> [ 7651.598498] bcache (dm-11): IO error on dm-11 for checksum error
> [ 7657.066482] bio_checksum_uncompress: 83 callbacks suppressed

The crc64 fix turned out to be an incompatible change for crc32c, so I had to
revert it. I'm just going to wait till I do all the other breaking changes for
that one (which should be soon).
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