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  1. Lustre
  2. LU-11290

Batch callbacks in osc_page_gang_lookup

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Details

    • Bug
    • Resolution: Fixed
    • Minor
    • Lustre 2.15.0
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      Lock cancellation can be very time consuming when there are many pages under a lock.

      One easy area for improvement is the osc_page_gang_lookup callback functions - These work on individual pages from an array, but they can be trivially modified to work on the entire array at once, reducing overhead.

      I've got a simple patch for this, which improves performance of lock cancellation by about 10%, and truncate [when pages are in cache] (which also uses the call back) by about 5%.

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-14711 Canceling lock with a lot of cached data can take a lot of time

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. LU-9920 Use pagevec for marking pages dirty

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

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            People

              dongyang Dongyang Li
              paf Patrick Farrell (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: