* Our own little FMR pool
*/
struct rds_ib_mr_pool {
+ unsigned int pool_type;
struct mutex flush_lock; /* serialize fmr invalidate */
struct delayed_work flush_worker; /* flush worker */
struct ib_fmr_attr fmr_attr;
};
-struct workqueue_struct *rds_ib_fmr_wq;
+static struct workqueue_struct *rds_ib_fmr_wq;
int rds_ib_fmr_init(void)
{
}
spin_unlock_irq(&rds_ibdev->spinlock);
- if (to_free) {
- synchronize_rcu();
- kfree(to_free);
- }
+ if (to_free)
+ kfree_rcu(to_free, rcu);
}
int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr)
rds_conn_destroy(ic->conn);
}
-struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_ibdev)
+struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_ibdev,
+ int pool_type)
{
struct rds_ib_mr_pool *pool;
if (!pool)
return ERR_PTR(-ENOMEM);
+ pool->pool_type = pool_type;
init_llist_head(&pool->free_list);
init_llist_head(&pool->drop_list);
init_llist_head(&pool->clean_list);
init_waitqueue_head(&pool->flush_wait);
INIT_DELAYED_WORK(&pool->flush_worker, rds_ib_mr_pool_flush_worker);
- pool->fmr_attr.max_pages = fmr_message_size;
+ if (pool_type == RDS_IB_MR_1M_POOL) {
+ /* +1 allows for unaligned MRs */
+ pool->fmr_attr.max_pages = RDS_FMR_1M_MSG_SIZE + 1;
+ pool->max_items = RDS_FMR_1M_POOL_SIZE;
+ } else {
+ /* pool_type == RDS_IB_MR_8K_POOL */
+ pool->fmr_attr.max_pages = RDS_FMR_8K_MSG_SIZE + 1;
+ pool->max_items = RDS_FMR_8K_POOL_SIZE;
+ }
+
+ pool->max_free_pinned = pool->max_items * pool->fmr_attr.max_pages / 4;
pool->fmr_attr.max_maps = rds_ibdev->fmr_max_remaps;
pool->fmr_attr.page_shift = PAGE_SHIFT;
- pool->max_free_pinned = rds_ibdev->max_fmrs * fmr_message_size / 4;
-
- /* We never allow more than max_items MRs to be allocated.
- * When we exceed more than max_items_soft, we start freeing
- * items more aggressively.
- * Make sure that max_items > max_items_soft > max_items / 2
- */
pool->max_items_soft = rds_ibdev->max_fmrs * 3 / 4;
- pool->max_items = rds_ibdev->max_fmrs;
return pool;
}
void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, struct rds_info_rdma_connection *iinfo)
{
- struct rds_ib_mr_pool *pool = rds_ibdev->mr_pool;
+ struct rds_ib_mr_pool *pool_1m = rds_ibdev->mr_1m_pool;
- iinfo->rdma_mr_max = pool->max_items;
- iinfo->rdma_mr_size = pool->fmr_attr.max_pages;
+ iinfo->rdma_mr_max = pool_1m->max_items;
+ iinfo->rdma_mr_size = pool_1m->fmr_attr.max_pages;
}
void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *pool)
}
}
-static struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev)
+static struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev,
+ int npages)
{
- struct rds_ib_mr_pool *pool = rds_ibdev->mr_pool;
+ struct rds_ib_mr_pool *pool;
struct rds_ib_mr *ibmr = NULL;
int err = 0, iter = 0;
+ if (npages <= RDS_FMR_8K_MSG_SIZE)
+ pool = rds_ibdev->mr_8k_pool;
+ else
+ pool = rds_ibdev->mr_1m_pool;
+
if (atomic_read(&pool->dirty_count) >= pool->max_items / 10)
- schedule_delayed_work(&pool->flush_worker, 10);
+ queue_delayed_work(rds_ib_fmr_wq, &pool->flush_worker, 10);
+
+ /* Switch pools if one of the pool is reaching upper limit */
+ if (atomic_read(&pool->dirty_count) >= pool->max_items * 9 / 10) {
+ if (pool->pool_type == RDS_IB_MR_8K_POOL)
+ pool = rds_ibdev->mr_1m_pool;
+ else
+ pool = rds_ibdev->mr_8k_pool;
+ }
while (1) {
ibmr = rds_ib_reuse_fmr(pool);
atomic_dec(&pool->item_count);
if (++iter > 2) {
- rds_ib_stats_inc(s_ib_rdma_mr_pool_depleted);
+ if (pool->pool_type == RDS_IB_MR_8K_POOL)
+ rds_ib_stats_inc(s_ib_rdma_mr_8k_pool_depleted);
+ else
+ rds_ib_stats_inc(s_ib_rdma_mr_1m_pool_depleted);
return ERR_PTR(-EAGAIN);
}
/* We do have some empty MRs. Flush them out. */
- rds_ib_stats_inc(s_ib_rdma_mr_pool_wait);
+ if (pool->pool_type == RDS_IB_MR_8K_POOL)
+ rds_ib_stats_inc(s_ib_rdma_mr_8k_pool_wait);
+ else
+ rds_ib_stats_inc(s_ib_rdma_mr_1m_pool_wait);
rds_ib_flush_mr_pool(pool, 0, &ibmr);
if (ibmr)
return ibmr;
goto out_no_cigar;
}
- rds_ib_stats_inc(s_ib_rdma_mr_alloc);
+ ibmr->pool = pool;
+ if (pool->pool_type == RDS_IB_MR_8K_POOL)
+ rds_ib_stats_inc(s_ib_rdma_mr_8k_alloc);
+ else
+ rds_ib_stats_inc(s_ib_rdma_mr_1m_alloc);
+
return ibmr;
out_no_cigar:
}
page_cnt += len >> PAGE_SHIFT;
- if (page_cnt > fmr_message_size)
+ if (page_cnt > ibmr->pool->fmr_attr.max_pages)
return -EINVAL;
dma_pages = kmalloc_node(sizeof(u64) * page_cnt, GFP_ATOMIC,
ibmr->sg_dma_len = sg_dma_len;
ibmr->remap_count++;
- rds_ib_stats_inc(s_ib_rdma_mr_used);
+ if (ibmr->pool->pool_type == RDS_IB_MR_8K_POOL)
+ rds_ib_stats_inc(s_ib_rdma_mr_8k_used);
+ else
+ rds_ib_stats_inc(s_ib_rdma_mr_1m_used);
ret = 0;
out:
__rds_ib_teardown_mr(ibmr);
if (pinned) {
- struct rds_ib_device *rds_ibdev = ibmr->device;
- struct rds_ib_mr_pool *pool = rds_ibdev->mr_pool;
+ struct rds_ib_mr_pool *pool = ibmr->pool;
atomic_sub(pinned, &pool->free_pinned);
}
* to free as many MRs as needed to get back to this limit.
*/
static int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *pool,
- int free_all, struct rds_ib_mr **ibmr_ret)
+ int free_all, struct rds_ib_mr **ibmr_ret)
{
struct rds_ib_mr *ibmr, *next;
struct llist_node *clean_nodes;
unsigned int nfreed = 0, dirty_to_clean = 0, free_goal;
int ret = 0;
- rds_ib_stats_inc(s_ib_rdma_mr_pool_flush);
+ if (pool->pool_type == RDS_IB_MR_8K_POOL)
+ rds_ib_stats_inc(s_ib_rdma_mr_8k_pool_flush);
+ else
+ rds_ib_stats_inc(s_ib_rdma_mr_1m_pool_flush);
if (ibmr_ret) {
DEFINE_WAIT(wait);
- while(!mutex_trylock(&pool->flush_lock)) {
+ while (!mutex_trylock(&pool->flush_lock)) {
ibmr = rds_ib_reuse_fmr(pool);
if (ibmr) {
*ibmr_ret = ibmr;
list_for_each_entry_safe(ibmr, next, &unmap_list, unmap_list) {
unpinned += ibmr->sg_len;
__rds_ib_teardown_mr(ibmr);
- if (nfreed < free_goal || ibmr->remap_count >= pool->fmr_attr.max_maps) {
- rds_ib_stats_inc(s_ib_rdma_mr_free);
+ if (nfreed < free_goal ||
+ ibmr->remap_count >= pool->fmr_attr.max_maps) {
+ if (ibmr->pool->pool_type == RDS_IB_MR_8K_POOL)
+ rds_ib_stats_inc(s_ib_rdma_mr_8k_free);
+ else
+ rds_ib_stats_inc(s_ib_rdma_mr_1m_free);
list_del(&ibmr->unmap_list);
ib_dealloc_fmr(ibmr->fmr);
kfree(ibmr);
void rds_ib_free_mr(void *trans_private, int invalidate)
{
struct rds_ib_mr *ibmr = trans_private;
+ struct rds_ib_mr_pool *pool = ibmr->pool;
struct rds_ib_device *rds_ibdev = ibmr->device;
- struct rds_ib_mr_pool *pool = rds_ibdev->mr_pool;
rdsdebug("RDS/IB: free_mr nents %u\n", ibmr->sg_len);
down_read(&rds_ib_devices_lock);
list_for_each_entry(rds_ibdev, &rds_ib_devices, list) {
- struct rds_ib_mr_pool *pool = rds_ibdev->mr_pool;
+ if (rds_ibdev->mr_8k_pool)
+ rds_ib_flush_mr_pool(rds_ibdev->mr_8k_pool, 0, NULL);
- if (pool)
- rds_ib_flush_mr_pool(pool, 0, NULL);
+ if (rds_ibdev->mr_1m_pool)
+ rds_ib_flush_mr_pool(rds_ibdev->mr_1m_pool, 0, NULL);
}
up_read(&rds_ib_devices_lock);
}
goto out;
}
- if (!rds_ibdev->mr_pool) {
+ if (!rds_ibdev->mr_8k_pool || !rds_ibdev->mr_1m_pool) {
ret = -ENODEV;
goto out;
}
- ibmr = rds_ib_alloc_fmr(rds_ibdev);
+ ibmr = rds_ib_alloc_fmr(rds_ibdev, nents);
if (IS_ERR(ibmr)) {
rds_ib_dev_put(rds_ibdev);
return ibmr;
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