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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2015-10-21 13:19:38 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-10-21 14:42:39 -0600 |
| commit | a48f041d91bf1aee599fa2adb53b780ed20c2ee5 (patch) | |
| tree | c1cb66965f987d782c5c6bc63826d2250caf8d18 /block/blk-integrity.c | |
| parent | 0f8087ecdeac921fc4920f1328f55c15080bc6aa (diff) | |
| download | linux-a48f041d91bf1aee599fa2adb53b780ed20c2ee5.tar.bz2 | |
block: Reduce the size of struct blk_integrity
The per-device properties in the blk_integrity structure were previously
unsigned short. However, most of the values fit inside a char. The only
exception is the data interval size and we can work around that by
storing it as a power of two.
This cuts the size of the dynamic portion of blk_integrity in half.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reported-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-integrity.c')
| -rw-r--r-- | block/blk-integrity.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index daf590ab3b46..c7508654faff 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -155,10 +155,10 @@ int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2) if (!b1 || !b2) return -1; - if (b1->interval != b2->interval) { + if (b1->interval_exp != b2->interval_exp) { pr_err("%s: %s/%s protection interval %u != %u\n", __func__, gd1->disk_name, gd2->disk_name, - b1->interval, b2->interval); + 1 << b1->interval_exp, 1 << b2->interval_exp); return -1; } @@ -440,7 +440,7 @@ int blk_integrity_register(struct gendisk *disk, struct blk_integrity *template) kobject_uevent(&disk->integrity_kobj, KOBJ_ADD); bi->flags |= BLK_INTEGRITY_VERIFY | BLK_INTEGRITY_GENERATE; - bi->interval = queue_logical_block_size(disk->queue); + bi->interval_exp = ilog2(queue_logical_block_size(disk->queue)); disk->integrity = bi; } else bi = disk->integrity; |