On Wed, Dec 20, 2017 at 11:59:20PM +0300, Timofey Titovets wrote: > How reproduce: > touch test_file > chattr +C test_file > dd if=/dev/zero of=test_file bs=1M count=1 > btrfs fi def -vrczlib test_file > filefrag -v test_file > > test_file > Filesystem type is: 9123683e > File size of test_file is 1048576 (256 blocks of 4096 bytes) > ext: logical_offset: physical_offset: length: expected: flags: > 0: 0.. 31: 72917050.. 72917081: 32: encoded > 1: 32.. 63: 72917118.. 72917149: 32: 72917082: encoded > 2: 64.. 95: 72919494.. 72919525: 32: 72917150: encoded > 3: 96.. 127: 72927576.. 72927607: 32: 72919526: encoded > 4: 128.. 159: 72943261.. 72943292: 32: 72927608: encoded > 5: 160.. 191: 72944929.. 72944960: 32: 72943293: encoded > 6: 192.. 223: 72944952.. 72944983: 32: 72944961: encoded > 7: 224.. 255: 72967084.. 72967115: 32: 72944984: > last,encoded,eof > test_file: 8 extents found > > I can't found at now, where that error happen in code, > but it's reproducible on Linux 4.14.8 >
Please check the comments in this function need_force_cow(), * Force cow if given extent needs to be defragged. and using zlib makes it compress the data. Thanks, -liubo -- 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
