Re: [PATCH] rds:Simplify the allocation of slab caches

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在 2024/6/17 15:54, Hongfu Li 写道:
Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
to simplify the creation of SLAB caches.

Signed-off-by: Hongfu Li <lihongfu@xxxxxxxxxx>
---
  net/rds/tcp.c      | 4 +---
  net/rds/tcp_recv.c | 4 +---
  2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/net/rds/tcp.c b/net/rds/tcp.c
index d8111ac83bb6..3dc6956f66f8 100644
--- a/net/rds/tcp.c
+++ b/net/rds/tcp.c
@@ -719,9 +719,7 @@ static int __init rds_tcp_init(void)
  {
  	int ret;
- rds_tcp_conn_slab = kmem_cache_create("rds_tcp_connection",
-					      sizeof(struct rds_tcp_connection),
-					      0, 0, NULL);
+	rds_tcp_conn_slab = KMEM_CACHE(rds_tcp_connection, 0);

KMEM_CACHE is declared as below:

/*
 * Please use this macro to create slab caches. Simply specify the
 * name of the structure and maybe some flags that are listed above.
 *
 * The alignment of the struct determines object alignment. If you
 * f.e. add ____cacheline_aligned_in_smp to the struct declaration
 * then the objects will be properly aligned in SMP configurations.
 */
#define KMEM_CACHE(__struct, __flags)                                   \
                kmem_cache_create(#__struct, sizeof(struct __struct),   \
                        __alignof__(struct __struct), (__flags), NULL)

Reviewed-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
Thanks a lot.

Zhu Yanjun

  	if (!rds_tcp_conn_slab) {
  		ret = -ENOMEM;
  		goto out;
diff --git a/net/rds/tcp_recv.c b/net/rds/tcp_recv.c
index c00f04a1a534..7997a19d1da3 100644
--- a/net/rds/tcp_recv.c
+++ b/net/rds/tcp_recv.c
@@ -337,9 +337,7 @@ void rds_tcp_data_ready(struct sock *sk)
int rds_tcp_recv_init(void)
  {
-	rds_tcp_incoming_slab = kmem_cache_create("rds_tcp_incoming",
-					sizeof(struct rds_tcp_incoming),
-					0, 0, NULL);
+	rds_tcp_incoming_slab = KMEM_CACHE(rds_tcp_incoming, 0);
  	if (!rds_tcp_incoming_slab)
  		return -ENOMEM;
  	return 0;





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