git: hammer2 / kern_dmsg - Fix bugs

[Matthew Dillon]

commit 1a2a529d2ed1cb3da316f7fe2d8ae44b4bdd27b7
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Sat Feb 28 08:13:49 2015 -0800

    hammer2 / kern_dmsg - Fix bugs
    
    * Fix header size limt check.
    
    * Do not free the message data out from under a running I/O.
      Introduce an API for detaching aux_data from a msg.
    
    * Increase DMSG_AUX_MAX to 1MB to ensure that xdisk (remote disks)
      work with any filesystem.
    
      Theoretically we can break up READ and WRITE messages into pieces
      in order to allow DMSG_AUX_MAX to be made smaller (which is easier
      to manage in-kernel), but for now the implementation just uses a
      single message transaction.
    
    * Adjust some comments.

Summary of changes:
 sys/kern/kern_dmsg.c              | 24 +++++++++++++++++++++++-
 sys/kern/subr_diskiocom.c         |  4 ++++
 sys/sys/dmsg.h                    | 22 ++++++++++++++++++++--
 sys/vfs/hammer2/hammer2_cluster.c |  2 +-
 sys/vfs/hammer2/hammer2_vfsops.c  |  2 --
 5 files changed, 48 insertions(+), 6 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/1a2a529d2ed1cb3da316f7fe2d8ae44b4bdd27b7


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