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| author | NeilBrown <neilb@suse.de> | 2006-06-26 00:27:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 09:58:37 -0700 |
| commit | 16a53ecc35f2a80dc285be2e769768847d89ca37 (patch) | |
| tree | 19d005f19af68e9b98efaf16885bb60498f540c1 /drivers/md/Kconfig | |
| parent | 16f17b39f385212b73278a76d482cdcaaebe6c02 (diff) | |
| download | linux-3.10-16a53ecc35f2a80dc285be2e769768847d89ca37.tar.gz linux-3.10-16a53ecc35f2a80dc285be2e769768847d89ca37.tar.bz2 linux-3.10-16a53ecc35f2a80dc285be2e769768847d89ca37.zip | |
[PATCH] md: merge raid5 and raid6 code
There is a lot of commonality between raid5.c and raid6main.c. This patches
merges both into one module called raid456. This saves a lot of code, and
paves the way for online raid5->raid6 migrations.
There is still duplication, e.g. between handle_stripe5 and handle_stripe6.
This will probably be cleaned up later.
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/Kconfig')
| -rw-r--r-- | drivers/md/Kconfig | 38 |
1 files changed, 12 insertions, 26 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index ac25a48362a..f657aa7ec78 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -104,8 +104,8 @@ config MD_RAID10 If unsure, say Y. -config MD_RAID5 - tristate "RAID-4/RAID-5 mode" +config MD_RAID456 + tristate "RAID-4/RAID-5/RAID-6 mode" depends on BLK_DEV_MD ---help--- A RAID-5 set of N drives with a capacity of C MB per drive provides @@ -116,14 +116,22 @@ config MD_RAID5 while a RAID-5 set distributes the parity across the drives in one of the available parity distribution methods. + A RAID-6 set of N drives with a capacity of C MB per drive + provides the capacity of C * (N - 2) MB, and protects + against a failure of any two drives. For a given sector + (row) number, (N - 2) drives contain data sectors, and two + drives contains two independent redundancy syndromes. Like + RAID-5, RAID-6 distributes the syndromes across the drives + in one of the available parity distribution methods. + Information about Software RAID on Linux is contained in the Software-RAID mini-HOWTO, available from <http://www.tldp.org/docs.html#howto>. There you will also learn where to get the supporting user space utilities raidtools. - If you want to use such a RAID-4/RAID-5 set, say Y. To + If you want to use such a RAID-4/RAID-5/RAID-6 set, say Y. To compile this code as a module, choose M here: the module - will be called raid5. + will be called raid456. If unsure, say Y. @@ -154,28 +162,6 @@ config MD_RAID5_RESHAPE There should be enough spares already present to make the new array workable. -config MD_RAID6 - tristate "RAID-6 mode" - depends on BLK_DEV_MD - ---help--- - A RAID-6 set of N drives with a capacity of C MB per drive - provides the capacity of C * (N - 2) MB, and protects - against a failure of any two drives. For a given sector - (row) number, (N - 2) drives contain data sectors, and two - drives contains two independent redundancy syndromes. Like - RAID-5, RAID-6 distributes the syndromes across the drives - in one of the available parity distribution methods. - - RAID-6 requires mdadm-1.5.0 or later, available at: - - ftp://ftp.kernel.org/pub/linux/utils/raid/mdadm/ - - If you want to use such a RAID-6 set, say Y. To compile - this code as a module, choose M here: the module will be - called raid6. - - If unsure, say Y. - config MD_MULTIPATH tristate "Multipath I/O support" depends on BLK_DEV_MD |