diff options
| author |   Joachim Fenkes <fenkes@de.ibm.com> | 2007-07-09 15:31:10 +0200 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2007-07-09 20:12:27 -0700 |
| commit | 26ed687fdd541c2542b79dcd75fb2c82eb36f189 (patch) | |
| tree | 45d5ad42b6b9259f273cc274d0fbf18a6d169e91 /drivers/infiniband/hw/ehca/ehca_qp.c | |
| parent | IB/ehca: Refactor sync between completions and destroy_cq using atomic_t (diff) | |
| download | linux-dev-26ed687fdd541c2542b79dcd75fb2c82eb36f189.tar.xz linux-dev-26ed687fdd541c2542b79dcd75fb2c82eb36f189.zip | |
IB/ehca: Change idr spinlocks into rwlocks
This eliminates lock contention among IRQs as well as the need to
disable IRQs around idr_find, because there are no IRQ writers.
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_qp.c')
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_qp.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c index 31d21526df5e..74671250303f 100644 --- a/drivers/infiniband/hw/ehca/ehca_qp.c +++ b/drivers/infiniband/hw/ehca/ehca_qp.c @@ -512,9 +512,9 @@ struct ehca_qp *internal_create_qp(struct ib_pd *pd, goto create_qp_exit0; } - spin_lock_irqsave(&ehca_qp_idr_lock, flags); + write_lock_irqsave(&ehca_qp_idr_lock, flags); ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token); - spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); + write_unlock_irqrestore(&ehca_qp_idr_lock, flags); } while (ret == -EAGAIN); @@ -733,9 +733,9 @@ create_qp_exit2: hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp); create_qp_exit1: - spin_lock_irqsave(&ehca_qp_idr_lock, flags); + write_lock_irqsave(&ehca_qp_idr_lock, flags); idr_remove(&ehca_qp_idr, my_qp->token); - spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); + write_unlock_irqrestore(&ehca_qp_idr_lock, flags); create_qp_exit0: kmem_cache_free(qp_cache, my_qp); @@ -1706,9 +1706,9 @@ int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp, } } - spin_lock_irqsave(&ehca_qp_idr_lock, flags); + write_lock_irqsave(&ehca_qp_idr_lock, flags); idr_remove(&ehca_qp_idr, my_qp->token); - spin_unlock_irqrestore(&ehca_qp_idr_lock, flags); + write_unlock_irqrestore(&ehca_qp_idr_lock, flags); h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp); if (h_ret != H_SUCCESS) { |