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authorNeilBrown <neilb@cse.unsw.edu.au>2005-09-09 19:23:47 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 19:39:10 -0400
commit15945fee6f09bff1f86b1a735b5888dc59cf38e3 (patch)
treeed2f66ceccfa30867035e7ba7be46159e97e4e4d /include/linux/raid/linear.h
parent4b6d287f627b5fb6a49f78f9e81649ff98c62bb7 (diff)
[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.h4
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;
14struct linear_private_data 14struct linear_private_data
15{ 15{
16 dev_info_t **hash_table; 16 dev_info_t **hash_table;
17 dev_info_t *smallest; 17 sector_t hash_spacing;
18 int nr_zones; 18 int preshift; /* shift before dividing by hash_spacing */
19 dev_info_t disks[0]; 19 dev_info_t disks[0];
20}; 20};
21 21