On Thu, Sep 15, 2016 at 11:36:14AM +0200, Marcin Mirosław wrote: > Hi! > I was playing with fs without tiering. I was using it for tmp dir for > compilation. Next I changed in sys: > echo crc64 > options/data_checksum > echo crc64 > options/metadata_checksum > echo crc64 > options/str_hash > > After a couple of minutes I got: > [ 8372.574346] bcache (dm-10): IO error on dm-10 for checksum error > [ 8372.680196] bcache (dm-10): IO error on dm-10 for checksum error > [ 8464.361860] bcache (dm-10): IO error on dm-10 for checksum error > [ 8466.146966] bcache (dm-10): IO error on dm-10 for checksum error > [ 8466.995095] bcache (dm-10): IO error on dm-10 for checksum error > [ 8469.199749] bcache (dm-10): IO error on dm-10 for checksum error > [ 8469.441408] bcache (dm-10): IO error on dm-10 for checksum error > [ 8469.722676] bcache (dm-10): IO error on dm-10 for checksum error > [ 8469.827055] bcache (dm-10): IO error on dm-10 for checksum error > [ 8470.038869] bcache (dm-10): IO error on dm-10 for checksum error > [ 8470.236663] bcache (dm-10): IO error on dm-10 for checksum error > [ 8470.427094] bcache (dm-10): IO error on dm-10 for checksum error > [ 8472.030519] bcache (dm-10): IO error on dm-10 for checksum error > [ 8473.098820] bcache (dm-10): IO error on dm-10 for checksum error > [ 8916.491297] bcache (dm-10): IO error on dm-10 for checksum error > [ 8916.715057] bcache (dm-10): IO error on dm-10 for checksum error > [ 8916.715111] bcache (dm-10): too many IO errors on dm-10, setting > filesystem RO > [ 8916.733056] bcache (dm-10): IO error on dm-10 for checksum error > [ 8916.733125] bcache (dm-10): dm-10 read only > [ 8916.733161] bcache (dm-10): too many IO errors on dm-10, setting > device RO > [ 8916.988286] bcache (dm-10): IO error: read only > [ 8916.988545] bcache (dm-10): IO error: read only Ok, it turns out the crc64 for data checksums code was just fubar. Fix is up (the fix does change how crc64 is computed for bios though, so it'll be incompatible with your existing filesystem). Also pushed a patch that adds some more error messages to fs-gc, we should figure out why it wouldn't mount. I can't think of any reason why data checksum errors would've caused that. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
