Seperate Metadata Support

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We are working on NVMe driver in linux kernel 4.13.10. We want to test an NVMe I/O commands with separate metadata. We send the command using IOCTL, and along the command we send the buffer to be used by driver to be sent to controller for metadata. The driver uses blk_execute_rq to submit the command to the block layer.



This implementation works properly for normal commands, but when used with separate metadata, it crashes at blk_mq_start_request.



Any help or information regarding this would be useful.






linux-kernel







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    We are working on NVMe driver in linux kernel 4.13.10. We want to test an NVMe I/O commands with separate metadata. We send the command using IOCTL, and along the command we send the buffer to be used by driver to be sent to controller for metadata. The driver uses blk_execute_rq to submit the command to the block layer.



    This implementation works properly for normal commands, but when used with separate metadata, it crashes at blk_mq_start_request.



    Any help or information regarding this would be useful.






    linux-kernel







    share|improve this question







    New contributor




    anujsingh.kr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
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      down vote

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      up vote
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      down vote

      favorite











      We are working on NVMe driver in linux kernel 4.13.10. We want to test an NVMe I/O commands with separate metadata. We send the command using IOCTL, and along the command we send the buffer to be used by driver to be sent to controller for metadata. The driver uses blk_execute_rq to submit the command to the block layer.



      This implementation works properly for normal commands, but when used with separate metadata, it crashes at blk_mq_start_request.



      Any help or information regarding this would be useful.






      linux-kernel







      share|improve this question







      New contributor




      anujsingh.kr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      We are working on NVMe driver in linux kernel 4.13.10. We want to test an NVMe I/O commands with separate metadata. We send the command using IOCTL, and along the command we send the buffer to be used by driver to be sent to controller for metadata. The driver uses blk_execute_rq to submit the command to the block layer.



      This implementation works properly for normal commands, but when used with separate metadata, it crashes at blk_mq_start_request.



      Any help or information regarding this would be useful.






      linux-kernel




      linux-kernel






      share|improve this question







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      anujsingh.kr is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











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