cvs commit: src/sys/kern vfs_bio.c

[Jeff Roberson]

jeff        2005-01-24 10:47:04 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_bio.c 
  Log:
   - Add CTR calls to trace the lifecycle of a buffer.
   - Remove some KASSERTs which are invalid if the appropriate lock is
     not held.
   - Slightly restructure bremfree() so that it is more sane.
   - Change the flush code in bdwrite() to avoid acquiring a mutex
     whenever possible.
   - Change the flush code in bdwrite() to avoid holding the bufobj mutex
     while calling buf_countdeps().  This introduces a lock-order
     relationship with the softdep lock that can not otherwise be resolved.
   - Don't set B_DONE until bufdone() is complete, otherwise another
     processor may believe the buf is done before it is.
   - Only acquire Giant if the caller has set b_iodone.  Don't grab giant
     around normal bufdone() calls.
  
  Sponsored By:   Isilon Systems, Inc.
  
  Revision  Changes    Path
  1.472     +84 -79    src/sys/kern/vfs_bio.c