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net-sysfs: remove rcu field from 'struct rps_sock_flow_table'

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Removing rcu_head (and @mask in a following patch)
will allow a power-of-two allocation and thus high-order
allocation for better performance.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260302181432.1836150-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet
2026-03-02 18:14:27 +00:00
committed by Jakub Kicinski
parent 42a101775b
commit 61753849b8
2 changed files with 3 additions and 2 deletions
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1
include/net/rps.h
View File

@@ -60,7 +60,6 @@ struct rps_dev_flow_table {
* meaning we use 32-6=26 bits for the hash.
*/
struct rps_sock_flow_table {
struct rcu_head rcu;
u32 mask;
u32 ents[] ____cacheline_aligned_in_smp;

4
net/core/sysctl_net_core.c
View File

@@ -147,6 +147,7 @@ static int rps_sock_flow_sysctl(const struct ctl_table *table, int write,
};
struct rps_sock_flow_table *orig_sock_table, *sock_table;
static DEFINE_MUTEX(sock_flow_mutex);
void *tofree = NULL;
mutex_lock(&sock_flow_mutex);
@@ -193,13 +194,14 @@ static int rps_sock_flow_sysctl(const struct ctl_table *table, int write,
if (orig_sock_table) {
static_branch_dec(&rps_needed);
static_branch_dec(&rfs_needed);
kvfree_rcu(orig_sock_table, rcu);
tofree = orig_sock_table;
}
}
}
mutex_unlock(&sock_flow_mutex);
kvfree_rcu_mightsleep(tofree);
return ret;
}
#endif /* CONFIG_RPS */