Uploaded image for project: 'Lustre'
  1. Lustre
  2. LU-9920

Use pagevec for marking pages dirty

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Minor Minor
    • Lustre 2.13.0
    • None
    • None
    • 3
    • 9223372036854775807

      When doing i/o from multiple writers to a single file, the
      per-file page cache lock (mapping->tree_lock) becomes a
      bottleneck.

      Most current uses are single page at a time. This converts
      one prominent use, marking page as dirty, to use a pagevec.

      This improves shared file write performance notably when
      many threads are writing to one file.

      [NB: Detailed numbers coming. Looks like no change in
      uncontended case, rising to ~25% for 8 writers.]

            dongyang Dongyang Li
            paf Patrick Farrell (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            8 Start watching this issue

              Created:
              Updated:
              Resolved: