git: DragonFly_RELEASE_2_8 kernel - Fix longstanding VM long-duration stall issues

Matthew Dillon dillon at
Fri Oct 29 21:02:55 PDT 2010

commit 1499c493dc0eb28f7cea4bc2a24e5a1e3a4b9e37
Author: Matthew Dillon <dillon at>
Date:   Fri Oct 29 20:58:00 2010 -0700

    kernel - Fix longstanding VM long-duration stall issues
    * The pageout daemon was using the wrong wakeup metrics and essentially
      would not start cleaning out pages until after processes began to
      enter vmwait/vmrate or otherwise begin to stall due to low free memory.
    * Fix the metric and also double-check every 5 seconds when the pagedaemon
      statistics wakeup occurs.
    * vm.v_free_min + vm.v_cache_min may now be used to tune when the
      pagedaemon is woken up.

Summary of changes:
 sys/vm/vm_pageout.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

DragonFly BSD source repository

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