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git: vfs_bio - Implement nestiobuf support

From: Alex Hornung <alexh@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 26 Jun 2010 18:13:30 -0700 (PDT)

commit 6aa75753a5747eedf62c438869c75c54e2602e69
Author: Alex Hornung <ahornung@gmail.com>
Date:   Wed Jun 2 09:59:39 2010 +0000

    vfs_bio - Implement nestiobuf support
    * Implement nestiobuf support (as NetBSD does) to split up a bio/buf
      into several smaller pieces that can be handled separately and only
      biodone() the "master" buffer when all smaller bio/buf pieces have
    Partially-Obtained-from: NetBSD

Summary of changes:
 sys/kern/vfs_bio.c |   91 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 sys/sys/buf.h      |    3 +-
 2 files changed, 93 insertions(+), 1 deletions(-)


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