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RDMA/core: Optimize XRC target lookup

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Replace the mutex with read write semaphore and use xarray instead of
linked list for XRC target QPs. This will give faster XRC target
lookup. In addition, when QP is closed, don't insert it back to the xarray
if the destroy command failed.

Link: https://lore.kernel.org/r/20200706122716.647338-4-leon@kernel.org
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Maor Gottlieb
2020-07-06 15:27:16 +03:00
committed by Jason Gunthorpe
parent b73efcb26e
commit 6f3ca6f4f5
2 changed files with 23 additions and 39 deletions
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5
include/rdma/ib_verbs.h
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@@ -1567,9 +1567,8 @@ struct ib_xrcd {
struct ib_device *device;
atomic_t usecnt; /* count all exposed resources */
struct inode *inode;
struct mutex tgt_qp_mutex;
struct list_head tgt_qp_list;
struct rw_semaphore tgt_qps_rwsem;
struct xarray tgt_qps;
};
struct ib_ah {