diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/md/raid5.c | 54 |
2 files changed, 29 insertions, 28 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 24d93d02a1f3..bfd9b9c6252c 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -109,7 +109,8 @@ config MD_RAID10 config MD_RAID456 tristate "RAID-4/RAID-5/RAID-6 mode" depends on BLK_DEV_MD - select XOR_BLOCKS + select ASYNC_MEMCPY + select ASYNC_XOR ---help--- A RAID-5 set of N drives with a capacity of C MB per drive provides the capacity of C * (N - 1) MB, and protects against a failure diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 5adbe0b22684..4f51dfa8e487 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -916,25 +916,25 @@ static void copy_data(int frombio, struct bio *bio, } } -#define check_xor() do { \ - if (count == MAX_XOR_BLOCKS) { \ - xor_blocks(count, STRIPE_SIZE, ptr); \ - count = 1; \ - } \ +#define check_xor() do { \ + if (count == MAX_XOR_BLOCKS) { \ + xor_blocks(count, STRIPE_SIZE, dest, ptr);\ + count = 0; \ + } \ } while(0) static void compute_block(struct stripe_head *sh, int dd_idx) { int i, count, disks = sh->disks; - void *ptr[MAX_XOR_BLOCKS], *p; + void *ptr[MAX_XOR_BLOCKS], *dest, *p; PRINTK("compute_block, stripe %llu, idx %d\n", (unsigned long long)sh->sector, dd_idx); - ptr[0] = page_address(sh->dev[dd_idx].page); - memset(ptr[0], 0, STRIPE_SIZE); - count = 1; + dest = page_address(sh->dev[dd_idx].page); + memset(dest, 0, STRIPE_SIZE); + count = 0; for (i = disks ; i--; ) { if (i == dd_idx) continue; @@ -948,8 +948,8 @@ static void compute_block(struct stripe_head *sh, int dd_idx) check_xor(); } - if (count != 1) - xor_blocks(count, STRIPE_SIZE, ptr); + if (count) + xor_blocks(count, STRIPE_SIZE, dest, ptr); set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); } @@ -957,14 +957,14 @@ static void compute_parity5(struct stripe_head *sh, int method) { raid5_conf_t *conf = sh->raid_conf; int i, pd_idx = sh->pd_idx, disks = sh->disks, count; - void *ptr[MAX_XOR_BLOCKS]; + void *ptr[MAX_XOR_BLOCKS], *dest; struct bio *chosen; PRINTK("compute_parity5, stripe %llu, method %d\n", (unsigned long long)sh->sector, method); - count = 1; - ptr[0] = page_address(sh->dev[pd_idx].page); + count = 0; + dest = page_address(sh->dev[pd_idx].page); switch(method) { case READ_MODIFY_WRITE: BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags)); @@ -987,7 +987,7 @@ static void compute_parity5(struct stripe_head *sh, int method) } break; case RECONSTRUCT_WRITE: - memset(ptr[0], 0, STRIPE_SIZE); + memset(dest, 0, STRIPE_SIZE); for (i= disks; i-- ;) if (i!=pd_idx && sh->dev[i].towrite) { chosen = sh->dev[i].towrite; @@ -1003,9 +1003,9 @@ static void compute_parity5(struct stripe_head *sh, int method) case CHECK_PARITY: break; } - if (count>1) { - xor_blocks(count, STRIPE_SIZE, ptr); - count = 1; + if (count) { + xor_blocks(count, STRIPE_SIZE, dest, ptr); + count = 0; } for (i = disks; i--;) @@ -1037,9 +1037,9 @@ static void compute_parity5(struct stripe_head *sh, int method) check_xor(); } } - if (count != 1) - xor_blocks(count, STRIPE_SIZE, ptr); - + if (count) + xor_blocks(count, STRIPE_SIZE, dest, ptr); + if (method != CHECK_PARITY) { set_bit(R5_UPTODATE, &sh->dev[pd_idx].flags); set_bit(R5_LOCKED, &sh->dev[pd_idx].flags); @@ -1132,7 +1132,7 @@ static void compute_parity6(struct stripe_head *sh, int method) static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero) { int i, count, disks = sh->disks; - void *ptr[MAX_XOR_BLOCKS], *p; + void *ptr[MAX_XOR_BLOCKS], *dest, *p; int pd_idx = sh->pd_idx; int qd_idx = raid6_next_disk(pd_idx, disks); @@ -1143,9 +1143,9 @@ static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero) /* We're actually computing the Q drive */ compute_parity6(sh, UPDATE_PARITY); } else { - ptr[0] = page_address(sh->dev[dd_idx].page); - if (!nozero) memset(ptr[0], 0, STRIPE_SIZE); - count = 1; + dest = page_address(sh->dev[dd_idx].page); + if (!nozero) memset(dest, 0, STRIPE_SIZE); + count = 0; for (i = disks ; i--; ) { if (i == dd_idx || i == qd_idx) continue; @@ -1159,8 +1159,8 @@ static void compute_block_1(struct stripe_head *sh, int dd_idx, int nozero) check_xor(); } - if (count != 1) - xor_blocks(count, STRIPE_SIZE, ptr); + if (count) + xor_blocks(count, STRIPE_SIZE, dest, ptr); if (!nozero) set_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); else clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); } |