diff options
Diffstat (limited to 'drivers/md/raid5.c')
-rw-r--r-- | drivers/md/raid5.c | 87 |
1 files changed, 39 insertions, 48 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 992fd08437d8..c033bfcb209e 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -54,7 +54,6 @@ #include <linux/slab.h> #include <linux/ratelimit.h> #include <linux/nodemask.h> -#include <linux/flex_array.h> #include <trace/events/block.h> #include <linux/list_sort.h> @@ -1394,22 +1393,16 @@ static void ops_complete_compute(void *stripe_head_ref) } /* return a pointer to the address conversion region of the scribble buffer */ -static addr_conv_t *to_addr_conv(struct stripe_head *sh, - struct raid5_percpu *percpu, int i) +static struct page **to_addr_page(struct raid5_percpu *percpu, int i) { - void *addr; - - addr = flex_array_get(percpu->scribble, i); - return addr + sizeof(struct page *) * (sh->disks + 2); + return percpu->scribble + i * percpu->scribble_obj_size; } /* return a pointer to the address conversion region of the scribble buffer */ -static struct page **to_addr_page(struct raid5_percpu *percpu, int i) +static addr_conv_t *to_addr_conv(struct stripe_head *sh, + struct raid5_percpu *percpu, int i) { - void *addr; - - addr = flex_array_get(percpu->scribble, i); - return addr; + return (void *) (to_addr_page(percpu, i) + sh->disks + 2); } static struct dma_async_tx_descriptor * @@ -2238,21 +2231,23 @@ static int grow_stripes(struct r5conf *conf, int num) * calculate over all devices (not just the data blocks), using zeros in place * of the P and Q blocks. */ -static struct flex_array *scribble_alloc(int num, int cnt, gfp_t flags) +static int scribble_alloc(struct raid5_percpu *percpu, + int num, int cnt, gfp_t flags) { - struct flex_array *ret; - size_t len; + size_t obj_size = + sizeof(struct page *) * (num+2) + + sizeof(addr_conv_t) * (num+2); + void *scribble; - len = sizeof(struct page *) * (num+2) + sizeof(addr_conv_t) * (num+2); - ret = flex_array_alloc(len, cnt, flags); - if (!ret) - return NULL; - /* always prealloc all elements, so no locking is required */ - if (flex_array_prealloc(ret, 0, cnt, flags)) { - flex_array_free(ret); - return NULL; - } - return ret; + scribble = kvmalloc_array(cnt, obj_size, flags); + if (!scribble) + return -ENOMEM; + + kvfree(percpu->scribble); + + percpu->scribble = scribble; + percpu->scribble_obj_size = obj_size; + return 0; } static int resize_chunks(struct r5conf *conf, int new_disks, int new_sectors) @@ -2270,23 +2265,18 @@ static int resize_chunks(struct r5conf *conf, int new_disks, int new_sectors) return 0; mddev_suspend(conf->mddev); get_online_cpus(); + for_each_present_cpu(cpu) { struct raid5_percpu *percpu; - struct flex_array *scribble; percpu = per_cpu_ptr(conf->percpu, cpu); - scribble = scribble_alloc(new_disks, - new_sectors / STRIPE_SECTORS, - GFP_NOIO); - - if (scribble) { - flex_array_free(percpu->scribble); - percpu->scribble = scribble; - } else { - err = -ENOMEM; + err = scribble_alloc(percpu, new_disks, + new_sectors / STRIPE_SECTORS, + GFP_NOIO); + if (err) break; - } } + put_online_cpus(); mddev_resume(conf->mddev); if (!err) { @@ -6743,25 +6733,26 @@ raid5_size(struct mddev *mddev, sector_t sectors, int raid_disks) static void free_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu) { safe_put_page(percpu->spare_page); - if (percpu->scribble) - flex_array_free(percpu->scribble); percpu->spare_page = NULL; + kvfree(percpu->scribble); percpu->scribble = NULL; } static int alloc_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu) { - if (conf->level == 6 && !percpu->spare_page) + if (conf->level == 6 && !percpu->spare_page) { percpu->spare_page = alloc_page(GFP_KERNEL); - if (!percpu->scribble) - percpu->scribble = scribble_alloc(max(conf->raid_disks, - conf->previous_raid_disks), - max(conf->chunk_sectors, - conf->prev_chunk_sectors) - / STRIPE_SECTORS, - GFP_KERNEL); - - if (!percpu->scribble || (conf->level == 6 && !percpu->spare_page)) { + if (!percpu->spare_page) + return -ENOMEM; + } + + if (scribble_alloc(percpu, + max(conf->raid_disks, + conf->previous_raid_disks), + max(conf->chunk_sectors, + conf->prev_chunk_sectors) + / STRIPE_SECTORS, + GFP_KERNEL)) { free_scratch_buffer(conf, percpu); return -ENOMEM; } |