On Wed, 2013-12-18 at 18:17 +-0100, eb wrote: +AD4- I've recently setup a system (Kernel 3.12.5-1-ARCH) which is layered as follows: +AD4- +AD4- /dev/sdb3 - cache0 (80 GB Intel SSD) +AD4- /dev/sdc1 - backing device (2 TB WD HDD) +AD4- +AD4- sdb3+-sdc1 +AD0APg- /dev/bcache0 +AD4- +AD4- On /dev/bcache0, there's a btrfs filesystem with 2 subvolumes, mounted +AD4- as / and /home. What's been bothering me are the following entries in +AD4- my kernel log: +AD4- +AD4- +AFs-13811.845540+AF0- incomplete page write in btrfs with offset 1536 and length 2560 +AD4- +AFs-13870.326639+AF0- incomplete page write in btrfs with offset 3072 and length 1024 +AD4- +AD4- The offset/length values are always either 1536/2560 or 3072/1024, +AD4- they sum up nicely to 4K. There are 607 of those in there as I am +AD4- writing this, the machine has been up 18 hours and been under no +AD4- particular I/O strain (it's a desktop). Btrfs shouldn't be setting the offset on the bios. Are you able to add a WARN+AF8-ON to the message that prints this so we can see the stack trace? Could you please cc the bcache and btrfs list together? -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
