cvs commit: src/sys/kern kern_acct.c

[John Baldwin]

jhb         2006-02-07 16:04:04 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_acct.c 
  Log:
  - Add a kthread to periodically call acctwatch() when accounting is active
    instead of calling acctwatch() from softclock.  The acctwatch() function
    needs to hold an sx lock and also makes a VFS call, and neither of these
    are good things (or safe) to do from a callout.  The kthread only exists
    and is running when accounting is turned on; it is started and stopped
    as needed.  I didn't run acctwatch() via the thread taskqueue at Robert's
    request as he was worried that if the accounting file was over NFS the
    VFS_STAT() calls might stall other work on the taskqueue.
  - Add an acct_disable() function to take care of closing the accounting
    vnode and cleaning up so we don't duplicate the same code in two
    different places.
  
  MFC after:      3 days
  
  Revision  Changes    Path
  1.79      +128 -28   src/sys/kern/kern_acct.c