xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

IB/ehca: Support small QP queues

Browse Source 
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>
This commit is contained in:
Stefan Roscher
2007-07-20 16:04:17 +02:00
committed by Roland Dreier
parent 0c10f7b79b
commit e2f81daf23
10 changed files with 382 additions and 163 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/infiniband/hw/ehca/ehca_main.c
View File

@@ -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();