forked from luck/tmp_suning_uos_patched
md/raid5: minor code cleanups in make_request.
... and to be certain the that make_request doesn't wait forever, add a 'wake_up' when ->reshape_progress has been set to MaxSector Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
parent
2cffc4a01d
commit
b0f9ec047b
|
@ -3637,10 +3637,9 @@ static int make_request(struct request_queue *q, struct bio * bi)
|
||||||
|
|
||||||
retry:
|
retry:
|
||||||
previous = 0;
|
previous = 0;
|
||||||
|
disks = conf->raid_disks;
|
||||||
prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
|
prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
|
||||||
if (likely(conf->reshape_progress == MaxSector))
|
if (unlikely(conf->reshape_progress != MaxSector)) {
|
||||||
disks = conf->raid_disks;
|
|
||||||
else {
|
|
||||||
/* spinlock is needed as reshape_progress may be
|
/* spinlock is needed as reshape_progress may be
|
||||||
* 64bit on a 32bit platform, and so it might be
|
* 64bit on a 32bit platform, and so it might be
|
||||||
* possible to see a half-updated value
|
* possible to see a half-updated value
|
||||||
|
@ -3650,7 +3649,6 @@ static int make_request(struct request_queue *q, struct bio * bi)
|
||||||
* to check again.
|
* to check again.
|
||||||
*/
|
*/
|
||||||
spin_lock_irq(&conf->device_lock);
|
spin_lock_irq(&conf->device_lock);
|
||||||
disks = conf->raid_disks;
|
|
||||||
if (mddev->delta_disks < 0
|
if (mddev->delta_disks < 0
|
||||||
? logical_sector < conf->reshape_progress
|
? logical_sector < conf->reshape_progress
|
||||||
: logical_sector >= conf->reshape_progress) {
|
: logical_sector >= conf->reshape_progress) {
|
||||||
|
@ -3679,7 +3677,7 @@ static int make_request(struct request_queue *q, struct bio * bi)
|
||||||
sh = get_active_stripe(conf, new_sector, previous,
|
sh = get_active_stripe(conf, new_sector, previous,
|
||||||
(bi->bi_rw&RWA_MASK));
|
(bi->bi_rw&RWA_MASK));
|
||||||
if (sh) {
|
if (sh) {
|
||||||
if (unlikely(conf->reshape_progress != MaxSector)) {
|
if (unlikely(previous)) {
|
||||||
/* expansion might have moved on while waiting for a
|
/* expansion might have moved on while waiting for a
|
||||||
* stripe, so we must do the range check again.
|
* stripe, so we must do the range check again.
|
||||||
* Expansion could still move past after this
|
* Expansion could still move past after this
|
||||||
|
@ -3690,10 +3688,9 @@ static int make_request(struct request_queue *q, struct bio * bi)
|
||||||
*/
|
*/
|
||||||
int must_retry = 0;
|
int must_retry = 0;
|
||||||
spin_lock_irq(&conf->device_lock);
|
spin_lock_irq(&conf->device_lock);
|
||||||
if ((mddev->delta_disks < 0
|
if (mddev->delta_disks < 0
|
||||||
? logical_sector >= conf->reshape_progress
|
? logical_sector >= conf->reshape_progress
|
||||||
: logical_sector < conf->reshape_progress)
|
: logical_sector < conf->reshape_progress)
|
||||||
&& previous)
|
|
||||||
/* mismatch, need to try again */
|
/* mismatch, need to try again */
|
||||||
must_retry = 1;
|
must_retry = 1;
|
||||||
spin_unlock_irq(&conf->device_lock);
|
spin_unlock_irq(&conf->device_lock);
|
||||||
|
@ -4977,6 +4974,7 @@ static void end_reshape(raid5_conf_t *conf)
|
||||||
conf->previous_raid_disks = conf->raid_disks;
|
conf->previous_raid_disks = conf->raid_disks;
|
||||||
conf->reshape_progress = MaxSector;
|
conf->reshape_progress = MaxSector;
|
||||||
spin_unlock_irq(&conf->device_lock);
|
spin_unlock_irq(&conf->device_lock);
|
||||||
|
wake_up(&conf->wait_for_overlap);
|
||||||
|
|
||||||
/* read-ahead size must cover two whole stripes, which is
|
/* read-ahead size must cover two whole stripes, which is
|
||||||
* 2 * (datadisks) * chunksize where 'n' is the number of raid devices
|
* 2 * (datadisks) * chunksize where 'n' is the number of raid devices
|
||||||
|
|
Loading…
Reference in New Issue
Block a user