W dniu 22.09.2016 o 13:14, Marcin Mirosław pisze:

W dniu 22.09.2016 o 12:58, Marcin Mirosław pisze:

quoted

Hi!
I'm at:
commit b7cb7779de9609899fa53f7bab4e3cee69ac1f7e
Author: Kent Overstreet [off-list ref]
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

And there is another problem. I can read every file (no read error), in
dmesg appear new messages about wrong checksum and this files are putted
into kernel cache.
I can read particular file again and again, no new message about
checksum appears. Then I'm doing echo 3 > ..drop_caches, after this I
reread particular file, I'm getting message about wrong checksum.
Shouldn't be access to such file disallowed?