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| author |   NeilBrown <neilb@cse.unsw.edu.au> | 2005-09-09 16:23:47 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 16:39:10 -0700 |
| commit | 15945fee6f09bff1f86b1a735b5888dc59cf38e3 (patch) | |
| tree | ed2f66ceccfa30867035e7ba7be46159e97e4e4d /include/linux/raid/linear.h | |
| parent | [PATCH] md: add write-behind support for md/raid1 (diff) | |
| download | linux-dev-15945fee6f09bff1f86b1a735b5888dc59cf38e3.tar.xz linux-dev-15945fee6f09bff1f86b1a735b5888dc59cf38e3.zip | |
[PATCH] md: support md/linear array with components greater than 2 terabytes.
linear currently uses division by the size of the smallest componenet device
to find which device a request goes to. If that smallest device is larger
than 2 terabytes, then the division will not work on some systems.
So we introduce a pre-shift, and take care not to make the hash table too
large, much like the code in raid0.
Also get rid of conf->nr_zones, which is not needed.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/raid/linear.h')
| -rw-r--r-- | include/linux/raid/linear.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/raid/linear.h b/include/linux/raid/linear.h index e04c4fe45b53..7eaf290e10e7 100644 --- a/include/linux/raid/linear.h +++ b/include/linux/raid/linear.h @@ -14,8 +14,8 @@ typedef struct dev_info dev_info_t; struct linear_private_data { dev_info_t **hash_table; - dev_info_t *smallest; - int nr_zones; + sector_t hash_spacing; + int preshift; /* shift before dividing by hash_spacing */ dev_info_t disks[0]; }; |