linux/drivers/md/raid10.c, branch v2.6.19

[PATCH] md: fix printk format warnings, seen on powerpc64:

2006-10-28T18:30:52Z

drivers/md/raid1.c:1479: warning: long long unsigned int format, long unsigned int arg (arg 4) drivers/md/raid10.c:1475: warning: long long unsigned int format, long unsigned int arg (arg 4) Signed-off-by: Randy Dunlap Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: fix calculation of ->degraded for multipath and raid10

2006-10-21T20:35:05Z

Two less-used md personalities have bugs in the calculation of ->degraded (the extent to which the array is degraded). Signed-off-by: Neil Brown Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: define ->congested_fn for raid1, raid10, and multipath

2006-10-03T15:04:18Z

raid1, raid10 and multipath don't report their 'congested' status through bdi_*_congested, but should. This patch adds the appropriate functions which just check the 'congested' status of all active members (with appropriate locking). raid1 read_balance should be modified to prefer devices where bdi_read_congested returns false. Then we could use the '&' branch rather than the '|' branch. However that should would need some benchmarking first to make sure it is actually a good idea. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: Improve locking around error handling

2006-10-03T15:04:18Z

The error handling routines don't use proper locking, and so two concurrent errors could trigger a problem. So: - use test-and-set and test-and-clear to synchonise the In_sync bits with the ->degraded count - use the spinlock to protect updates to the degraded count (could use an atomic_t but that would be a bigger change in code, and isn't really justified) - remove un-necessary locking in raid5 Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: remove 'working_disks' from raid10 state

2006-10-03T15:04:17Z

It isn't needed as mddev->degraded contains equivalent info. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: replace magic numbers in sb_dirty with well defined bit flags

2006-10-03T15:04:17Z

Instead of magic numbers (0,1,2,3) in sb_dirty, we have some flags instead: MD_CHANGE_DEVS Some device state has changed requiring superblock update on all devices. MD_CHANGE_CLEAN The array has transitions from 'clean' to 'dirty' or back, requiring a superblock update on active devices, but possibly not on spares MD_CHANGE_PENDING A superblock update is underway. We wait for an update to complete by waiting for all flags to be clear. A flag can be set at any time, even during an update, without risk that the change will be lost. Stop exporting md_update_sb - isn't needed. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: factor out part of raid10d into a separate function.

2006-10-03T15:04:17Z

raid10d has toooo many nested block, so take the fix_read_error functionality out into a separate function. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: include sector number in messages about corrected read errors

2006-07-10T20:24:17Z

This is generally useful, but particularly helps see if it is the same sector that always needs correcting, or different ones. [akpm@osdl.org: fix printk warnings] Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: Calculate correct array size for raid10 in new offset mode

2006-06-26T16:58:39Z

The size calculation made assumtion which the new offset mode didn't follow. This gets the size right in all cases. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] md: support stripe/offset mode in raid10

2006-06-26T16:58:37Z

The "industry standard" DDF format allows for a stripe/offset layout where data is duplicated on different stripes. e.g. A B C D D A B C E F G H H E F G (columns are drives, rows are stripes, LETTERS are chunks of data). This is similar to raid10's 'far' mode, but not quite the same. So enhance 'far' mode with a 'far/offset' option which follows the layout of DDFs stripe/offset. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds