diff options
| author | Stefan Roscher <stefan.roscher at de.ibm.com> | 2007-07-20 14:04:17 (GMT) |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-07-21 04:19:47 (GMT) |
| commit | e2f81daf23efde23d8cac1fc253d41838f0347cf (patch) | |
| tree | 310c493f007cc10625426118eaf217e50dd978f3 /drivers/infiniband/hw/ehca/ehca_main.c | |
| parent | 0c10f7b79b5bb07a37aa5927072abdc3f45ac8d3 (diff) | |
| download | linux-e2f81daf23efde23d8cac1fc253d41838f0347cf.tar.xz | |
IB/ehca: Support small QP queues
eHCA2 supports QP queues that can be as small as 512 bytes. This
greatly reduces memory overhead for consumers that use lots of QPs
with small queues (e.g. RDMA-only QPs). Apart from dealing with
firmware, this code needs to manage bite-sized chunks of kernel pages,
making sure that no kernel page is shared between different protection
domains.
Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_main.c')
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_main.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c index bb104b7..99036b6 100644 --- a/drivers/infiniband/hw/ehca/ehca_main.c +++ b/drivers/infiniband/hw/ehca/ehca_main.c @@ -181,6 +181,12 @@ static int ehca_create_slab_caches(void) goto create_slab_caches5; } + ret = ehca_init_small_qp_cache(); + if (ret) { + ehca_gen_err("Cannot create small queue SLAB cache."); + goto create_slab_caches6; + } + #ifdef CONFIG_PPC_64K_PAGES ctblk_cache = kmem_cache_create("ehca_cache_ctblk", EHCA_PAGESIZE, H_CB_ALIGNMENT, @@ -188,12 +194,15 @@ static int ehca_create_slab_caches(void) NULL); if (!ctblk_cache) { ehca_gen_err("Cannot create ctblk SLAB cache."); - ehca_cleanup_mrmw_cache(); - goto create_slab_caches5; + ehca_cleanup_small_qp_cache(); + goto create_slab_caches6; } #endif return 0; +create_slab_caches6: + ehca_cleanup_mrmw_cache(); + create_slab_caches5: ehca_cleanup_av_cache(); @@ -211,6 +220,7 @@ create_slab_caches2: static void ehca_destroy_slab_caches(void) { + ehca_cleanup_small_qp_cache(); ehca_cleanup_mrmw_cache(); ehca_cleanup_av_cache(); ehca_cleanup_qp_cache(); |