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  1. Lustre
  2. LU-14969

Fall back to buffered I/O for unaligned direct I/O

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    • New Feature
    • Resolution: Won't Do
    • Minor
    • None
    • None
    • None
    • 9223372036854775807

    Description

      The SPECStorage test assumes we can do direct i/o at a 512 byte alignment boundary.  This is not the case in Lustre, since we have to be page aligned.

      The easy solution is to do what GPFS and several other file systems do:
      Fall back to buffered I/O in this case.  This is supported behavior in the kernel since at least 2.6.32.

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-13802 New i/o path: Buffered i/o as DIO

          • Major - Major loss of function.
          • Open

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              paf0186 Patrick Farrell
              paf0186 Patrick Farrell
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              Dates

                Created:
                Updated:
                Resolved: