git: fsync - Add sysctl to relax fsync requirements.
commit 6f3d87c0090b53820d5f8ea1a7b2bbb8fd476abb
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Mon Aug 24 08:16:14 2009 -0700
fsync - Add sysctl to relax fsync requirements.
* sysctl vfs.hammer.fsync_mode (defaults to 0 == full fsync semantics).
0 - full fsync semantics
1 - asynchronous
2 - synchronous fsync on close if fsync called prior to close
3 - asynchronous fsync on close if fsync called prior to close
4 - ignore fsync (30-second system sync takes care of it)
* This is likely a temporary measure until HAMMER gets a REDO log.
It is mainly to facilitate testing and to reduce the pounding
disks take from pkgsrc bulk builds (pkg_add seems to insist on
calling fsync() a lot for no reason).
Summary of changes:
sys/vfs/hammer/hammer.h | 3 ++
sys/vfs/hammer/hammer_ondisk.c | 2 +-
sys/vfs/hammer/hammer_vfsops.c | 3 ++
sys/vfs/hammer/hammer_vnops.c | 63 ++++++++++++++++++++++++++++++++++++++--
4 files changed, 67 insertions(+), 4 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/6f3d87c0090b53820d5f8ea1a7b2bbb8fd476abb
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