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bcache dirty_data not exist

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SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)
SUSE Linux Enterprise Server for SAP Applications Service Pack 1


The /var/log/message contains following message: 

/sys/fs/bcache/bcache<ID>/dirty_data: No such file or directory

This happen after patching SLES 12 SP1 server to use newer kernel. 


The location is usually called from custom created scripts with a specific purpose in mind (non SUSE provided scripts).

dirty_data is now moved to /sys/block/bcache<ID>/bcache/dirty_data 

To properly resolve the problem, the script would need to be modified to point to the right location specified above. 


dirty_data have been removed in kernel-3.12.74-60.64.82 and this is an upstream change, dirty_data is removed from struct gc_stat.

The dirty data file is moved to /sys/block/bcache<ID>/bcache/dirty_data, the new location is used to count dirty data for specific backing device. The previous global dirty data number can be calculated by adding all the per-backing-device dirty_data numbers.


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  • Document ID:7024194
  • Creation Date: 22-Oct-2019
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server
    • SUSE Linux Enterprise Server for SAP Applications

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