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authorSteven Whitehouse <swhiteho@redhat.com>2009-01-12 10:43:39 +0000
committerSteven Whitehouse <steve@dolmen.chygwyn.com>2009-03-24 11:21:14 +0000
commitf057f6cdf64175db1151b1f5d110e29904f119a1 (patch)
tree582dbf358e351f64977620c29ebf772d693b1948 /fs/gfs2/Kconfig
parent22077f57dec8fcbeb1112b35313961c0902ff038 (diff)
downloadblackbird-op-linux-f057f6cdf64175db1151b1f5d110e29904f119a1.tar.gz
blackbird-op-linux-f057f6cdf64175db1151b1f5d110e29904f119a1.zip
GFS2: Merge lock_dlm module into GFS2
This is the big patch that I've been working on for some time now. There are many reasons for wanting to make this change such as: o Reducing overhead by eliminating duplicated fields between structures o Simplifcation of the code (reduces the code size by a fair bit) o The locking interface is now the DLM interface itself as proposed some time ago. o Fewer lookups of glocks when processing replies from the DLM o Fewer memory allocations/deallocations for each glock o Scope to do further optimisations in the future (but this patch is more than big enough for now!) Please note that (a) this patch relates to the lock_dlm module and not the DLM itself, that is still a separate module; and (b) that we retain the ability to build GFS2 as a standalone single node filesystem with out requiring the DLM. This patch needs a lot of testing, hence my keeping it I restarted my -git tree after the last merge window. That way, this has the maximum exposure before its merged. This is (modulo a few minor bug fixes) the same patch that I've been posting on and off the the last three months and its passed a number of different tests so far. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/Kconfig')
-rw-r--r--fs/gfs2/Kconfig17
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/gfs2/Kconfig b/fs/gfs2/Kconfig
index e563a6449811..3a981b7f64ca 100644
--- a/fs/gfs2/Kconfig
+++ b/fs/gfs2/Kconfig
@@ -1,6 +1,10 @@
config GFS2_FS
tristate "GFS2 file system support"
depends on EXPERIMENTAL && (64BIT || LBD)
+ select DLM if GFS2_FS_LOCKING_DLM
+ select CONFIGFS_FS if GFS2_FS_LOCKING_DLM
+ select SYSFS if GFS2_FS_LOCKING_DLM
+ select IP_SCTP if DLM_SCTP
select FS_POSIX_ACL
select CRC32
help
@@ -18,17 +22,16 @@ config GFS2_FS
the locking module below. Documentation and utilities for GFS2 can
be found here: http://sources.redhat.com/cluster
- The "nolock" lock module is now built in to GFS2 by default.
+ The "nolock" lock module is now built in to GFS2 by default. If
+ you want to use the DLM, be sure to enable HOTPLUG and IPv4/6
+ networking.
config GFS2_FS_LOCKING_DLM
- tristate "GFS2 DLM locking module"
- depends on GFS2_FS && SYSFS && NET && INET && (IPV6 || IPV6=n)
- select IP_SCTP if DLM_SCTP
- select CONFIGFS_FS
- select DLM
+ bool "GFS2 DLM locking"
+ depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && HOTPLUG
help
Multiple node locking module for GFS2
- Most users of GFS2 will require this module. It provides the locking
+ Most users of GFS2 will require this. It provides the locking
interface between GFS2 and the DLM, which is required to use GFS2
in a cluster environment.
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