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| author | Neil Brown <neilb@suse.de> | 2007-12-13 14:16:04 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2007-12-20 17:32:12 +0000 |
| commit | 91212507f93778c09d4c1335207b6f4b995f5ad1 (patch) | |
| tree | 651bc8678413d7d6d6879214264f4bb7f9fb089d | |
| parent | 69267a30bed1fabec658058c63845528a8b813d4 (diff) | |
| download | linux-3.10-91212507f93778c09d4c1335207b6f4b995f5ad1.tar.gz linux-3.10-91212507f93778c09d4c1335207b6f4b995f5ad1.tar.bz2 linux-3.10-91212507f93778c09d4c1335207b6f4b995f5ad1.zip | |
dm: merge max_hw_sector
Make sure dm honours max_hw_sectors of underlying devices
We still have no firm testing evidence in support of this patch but
believe it may help to resolve some bug reports. - agk
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
| -rw-r--r-- | drivers/md/dm-table.c | 9 | ||||
| -rw-r--r-- | include/linux/device-mapper.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index f3f952e347e..47818d8249c 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -99,6 +99,9 @@ static void combine_restrictions_low(struct io_restrictions *lhs, lhs->max_segment_size = min_not_zero(lhs->max_segment_size, rhs->max_segment_size); + lhs->max_hw_sectors = + min_not_zero(lhs->max_hw_sectors, rhs->max_hw_sectors); + lhs->seg_boundary_mask = min_not_zero(lhs->seg_boundary_mask, rhs->seg_boundary_mask); @@ -566,6 +569,9 @@ void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev) rs->max_segment_size = min_not_zero(rs->max_segment_size, q->max_segment_size); + rs->max_hw_sectors = + min_not_zero(rs->max_hw_sectors, q->max_hw_sectors); + rs->seg_boundary_mask = min_not_zero(rs->seg_boundary_mask, q->seg_boundary_mask); @@ -703,6 +709,8 @@ static void check_for_valid_limits(struct io_restrictions *rs) { if (!rs->max_sectors) rs->max_sectors = SAFE_MAX_SECTORS; + if (!rs->max_hw_sectors) + rs->max_hw_sectors = SAFE_MAX_SECTORS; if (!rs->max_phys_segments) rs->max_phys_segments = MAX_PHYS_SEGMENTS; if (!rs->max_hw_segments) @@ -901,6 +909,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q) q->max_hw_segments = t->limits.max_hw_segments; q->hardsect_size = t->limits.hardsect_size; q->max_segment_size = t->limits.max_segment_size; + q->max_hw_sectors = t->limits.max_hw_sectors; q->seg_boundary_mask = t->limits.seg_boundary_mask; q->bounce_pfn = t->limits.bounce_pfn; if (t->limits.no_cluster) diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index b8b7c51389f..e765e191663 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -115,6 +115,7 @@ struct io_restrictions { unsigned short max_hw_segments; unsigned short hardsect_size; unsigned int max_segment_size; + unsigned int max_hw_sectors; unsigned long seg_boundary_mask; unsigned long bounce_pfn; unsigned char no_cluster; /* inverted so that 0 is default */ |