aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/md
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/raid0.c58
1 files changed, 29 insertions, 29 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 6e85e88bbae9..90f5b24f6e6c 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -213,16 +213,16 @@ static int create_strip_zones (mddev_t *mddev)
213 * strip though as it's size has no bearing on the efficacy of the hash 213 * strip though as it's size has no bearing on the efficacy of the hash
214 * table. 214 * table.
215 */ 215 */
216 conf->hash_spacing = curr_zone_start / 2; 216 conf->spacing = curr_zone_start;
217 min_spacing = curr_zone_start / 2; 217 min_spacing = curr_zone_start;
218 sector_div(min_spacing, PAGE_SIZE/sizeof(struct strip_zone*)); 218 sector_div(min_spacing, PAGE_SIZE/sizeof(struct strip_zone*));
219 for (i=0; i < conf->nr_strip_zones-1; i++) { 219 for (i=0; i < conf->nr_strip_zones-1; i++) {
220 sector_t sz = 0; 220 sector_t s = 0;
221 for (j=i; j<conf->nr_strip_zones-1 && 221 for (j = i; j < conf->nr_strip_zones - 1 &&
222 sz < min_spacing ; j++) 222 s < min_spacing; j++)
223 sz += conf->strip_zone[j].sectors / 2; 223 s += conf->strip_zone[j].sectors;
224 if (sz >= min_spacing && sz < conf->hash_spacing) 224 if (s >= min_spacing && s < conf->spacing)
225 conf->hash_spacing = sz; 225 conf->spacing = s;
226 } 226 }
227 227
228 mddev->queue->unplug_fn = raid0_unplug; 228 mddev->queue->unplug_fn = raid0_unplug;
@@ -265,7 +265,7 @@ static int raid0_mergeable_bvec(struct request_queue *q,
265static int raid0_run (mddev_t *mddev) 265static int raid0_run (mddev_t *mddev)
266{ 266{
267 unsigned cur=0, i=0, nb_zone; 267 unsigned cur=0, i=0, nb_zone;
268 s64 size; 268 s64 sectors;
269 raid0_conf_t *conf; 269 raid0_conf_t *conf;
270 mdk_rdev_t *rdev; 270 mdk_rdev_t *rdev;
271 struct list_head *tmp; 271 struct list_head *tmp;
@@ -297,51 +297,51 @@ static int raid0_run (mddev_t *mddev)
297 rdev_for_each(rdev, tmp, mddev) 297 rdev_for_each(rdev, tmp, mddev)
298 mddev->array_sectors += rdev->size * 2; 298 mddev->array_sectors += rdev->size * 2;
299 299
300 printk("raid0 : md_size is %llu blocks.\n", 300 printk(KERN_INFO "raid0 : md_size is %llu sectors.\n",
301 (unsigned long long)mddev->array_sectors / 2); 301 (unsigned long long)mddev->array_sectors);
302 printk("raid0 : conf->hash_spacing is %llu blocks.\n", 302 printk(KERN_INFO "raid0 : conf->spacing is %llu sectors.\n",
303 (unsigned long long)conf->hash_spacing); 303 (unsigned long long)conf->spacing);
304 { 304 {
305 sector_t s = mddev->array_sectors / 2; 305 sector_t s = mddev->array_sectors;
306 sector_t space = conf->hash_spacing; 306 sector_t space = conf->spacing;
307 int round; 307 int round;
308 conf->preshift = 0; 308 conf->sector_shift = 0;
309 if (sizeof(sector_t) > sizeof(u32)) { 309 if (sizeof(sector_t) > sizeof(u32)) {
310 /*shift down space and s so that sector_div will work */ 310 /*shift down space and s so that sector_div will work */
311 while (space > (sector_t) (~(u32)0)) { 311 while (space > (sector_t) (~(u32)0)) {
312 s >>= 1; 312 s >>= 1;
313 space >>= 1; 313 space >>= 1;
314 s += 1; /* force round-up */ 314 s += 1; /* force round-up */
315 conf->preshift++; 315 conf->sector_shift++;
316 } 316 }
317 } 317 }
318 round = sector_div(s, (u32)space) ? 1 : 0; 318 round = sector_div(s, (u32)space) ? 1 : 0;
319 nb_zone = s + round; 319 nb_zone = s + round;
320 } 320 }
321 printk("raid0 : nb_zone is %d.\n", nb_zone); 321 printk(KERN_INFO "raid0 : nb_zone is %d.\n", nb_zone);
322 322
323 printk("raid0 : Allocating %Zd bytes for hash.\n", 323 printk(KERN_INFO "raid0 : Allocating %zu bytes for hash.\n",
324 nb_zone*sizeof(struct strip_zone*)); 324 nb_zone*sizeof(struct strip_zone*));
325 conf->hash_table = kmalloc (sizeof (struct strip_zone *)*nb_zone, GFP_KERNEL); 325 conf->hash_table = kmalloc (sizeof (struct strip_zone *)*nb_zone, GFP_KERNEL);
326 if (!conf->hash_table) 326 if (!conf->hash_table)
327 goto out_free_conf; 327 goto out_free_conf;
328 size = conf->strip_zone[cur].sectors / 2; 328 sectors = conf->strip_zone[cur].sectors;
329 329
330 conf->hash_table[0] = conf->strip_zone + cur; 330 conf->hash_table[0] = conf->strip_zone + cur;
331 for (i=1; i< nb_zone; i++) { 331 for (i=1; i< nb_zone; i++) {
332 while (size <= conf->hash_spacing) { 332 while (sectors <= conf->spacing) {
333 cur++; 333 cur++;
334 size += conf->strip_zone[cur].sectors / 2; 334 sectors += conf->strip_zone[cur].sectors;
335 } 335 }
336 size -= conf->hash_spacing; 336 sectors -= conf->spacing;
337 conf->hash_table[i] = conf->strip_zone + cur; 337 conf->hash_table[i] = conf->strip_zone + cur;
338 } 338 }
339 if (conf->preshift) { 339 if (conf->sector_shift) {
340 conf->hash_spacing >>= conf->preshift; 340 conf->spacing >>= conf->sector_shift;
341 /* round hash_spacing up so when we divide by it, we 341 /* round spacing up so when we divide by it, we
342 * err on the side of too-low, which is safest 342 * err on the side of too-low, which is safest
343 */ 343 */
344 conf->hash_spacing++; 344 conf->spacing++;
345 } 345 }
346 346
347 /* calculate the max read-ahead size. 347 /* calculate the max read-ahead size.
@@ -435,8 +435,8 @@ static int raid0_make_request (struct request_queue *q, struct bio *bio)
435 435
436 436
437 { 437 {
438 sector_t x = sector >> (conf->preshift + 1); 438 sector_t x = sector >> conf->sector_shift;
439 sector_div(x, (u32)conf->hash_spacing); 439 sector_div(x, (u32)conf->spacing);
440 zone = conf->hash_table[x]; 440 zone = conf->hash_table[x];
441 } 441 }
442 442