diff options
| author | Shaohua Li <shli@kernel.org> | 2012-05-22 05:55:05 +0200 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-05-22 05:55:05 +0200 |
| commit | bc0934f0477d0a2350a478004799d9c064923b7b (patch) | |
| tree | 9ca749760c19637a941e7eed76652e7da298687c /drivers/md | |
| parent | raid5: remove unused variables (diff) | |
| download | linux-bc0934f0477d0a2350a478004799d9c064923b7b.tar.xz linux-bc0934f0477d0a2350a478004799d9c064923b7b.zip | |
raid5: support sync request
REQ_SYNC is ignored in current raid5 code. Block layer does use it to do
policy,
for example ioscheduler. This patch adds it.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5.c | 12 | ||||
| -rw-r--r-- | drivers/md/raid5.h | 1 |
2 files changed, 11 insertions, 2 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 962c8f40908f..7bfd59b313d7 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -539,6 +539,8 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s) replace_only = 1; } else continue; + if (test_and_clear_bit(R5_SyncIO, &sh->dev[i].flags)) + rw |= REQ_SYNC; bi = &sh->dev[i].req; rbi = &sh->dev[i].rreq; /* For writing to replacement */ @@ -1145,6 +1147,8 @@ ops_run_biodrain(struct stripe_head *sh, struct dma_async_tx_descriptor *tx) dev->sector + STRIPE_SECTORS) { if (wbi->bi_rw & REQ_FUA) set_bit(R5_WantFUA, &dev->flags); + if (wbi->bi_rw & REQ_SYNC) + set_bit(R5_SyncIO, &dev->flags); tx = async_copy_data(1, wbi, dev->page, dev->sector, tx); wbi = r5_next_bio(wbi, dev->sector); @@ -1162,13 +1166,15 @@ static void ops_complete_reconstruct(void *stripe_head_ref) int pd_idx = sh->pd_idx; int qd_idx = sh->qd_idx; int i; - bool fua = false; + bool fua = false, sync = false; pr_debug("%s: stripe %llu\n", __func__, (unsigned long long)sh->sector); - for (i = disks; i--; ) + for (i = disks; i--; ) { fua |= test_bit(R5_WantFUA, &sh->dev[i].flags); + sync |= test_bit(R5_SyncIO, &sh->dev[i].flags); + } for (i = disks; i--; ) { struct r5dev *dev = &sh->dev[i]; @@ -1177,6 +1183,8 @@ static void ops_complete_reconstruct(void *stripe_head_ref) set_bit(R5_UPTODATE, &dev->flags); if (fua) set_bit(R5_WantFUA, &dev->flags); + if (sync) + set_bit(R5_SyncIO, &dev->flags); } } diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index c6bdfa01d987..2164021f3b5f 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -285,6 +285,7 @@ enum r5dev_flags { */ R5_Wantdrain, /* dev->towrite needs to be drained */ R5_WantFUA, /* Write should be FUA */ + R5_SyncIO, /* The IO is sync */ R5_WriteError, /* got a write error - need to record it */ R5_MadeGood, /* A bad block has been fixed by writing to it */ R5_ReadRepl, /* Will/did read from replacement rather than orig */ |