AcoSail/kernel_optimize_test
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rds: store socket timestamps as ktime_t

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rds is the last in-kernel user of the old do_gettimeofday()
function. Convert it over to ktime_get_real() to make it
work more like the generic socket timestamps, and to let
us kill off do_gettimeofday().

A follow-up patch will have to change the user space interface
to deal better with 32-bit tasks, which may use an incompatible
layout for 'struct timespec'.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2018-08-29 17:47:19 +02:00 committed by David S. Miller
parent c2ad647c64
commit 2de9d505fb
2 changed files with 7 additions and 9 deletions
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2
net/rds/rds.h
View File

@ -278,7 +278,7 @@ struct rds_incoming {
struct in6_addr i_saddr;
rds_rdma_cookie_t i_rdma_cookie;
struct timeval i_rx_tstamp;
ktime_t i_rx_tstamp;
u64 i_rx_lat_trace[RDS_RX_MAX_TRACES];
};

14
net/rds/recv.c
View File

@ -50,8 +50,7 @@ void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
inc->i_conn = conn;
inc->i_saddr = *saddr;
inc->i_rdma_cookie = 0;
inc->i_rx_tstamp.tv_sec = 0;
inc->i_rx_tstamp.tv_usec = 0;
inc->i_rx_tstamp = ktime_set(0, 0);
for (i = 0; i < RDS_RX_MAX_TRACES; i++)
inc->i_rx_lat_trace[i] = 0;
@ -67,8 +66,7 @@ void rds_inc_path_init(struct rds_incoming *inc, struct rds_conn_path *cp,
inc->i_conn_path = cp;
inc->i_saddr = *saddr;
inc->i_rdma_cookie = 0;
inc->i_rx_tstamp.tv_sec = 0;
inc->i_rx_tstamp.tv_usec = 0;
inc->i_rx_tstamp = ktime_set(0, 0);
}
EXPORT_SYMBOL_GPL(rds_inc_path_init);
@ -385,7 +383,7 @@ void rds_recv_incoming(struct rds_connection *conn, struct in6_addr *saddr,
be32_to_cpu(inc->i_hdr.h_len),
inc->i_hdr.h_dport);
if (sock_flag(sk, SOCK_RCVTSTAMP))
do_gettimeofday(&inc->i_rx_tstamp);
inc->i_rx_tstamp = ktime_get_real();
rds_inc_addref(inc);
inc->i_rx_lat_trace[RDS_MSG_RX_END] = local_clock();
list_add_tail(&inc->i_item, &rs->rs_recv_queue);
@ -552,11 +550,11 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg,
goto out;
}
if ((inc->i_rx_tstamp.tv_sec != 0) &&
if ((inc->i_rx_tstamp != 0) &&
sock_flag(rds_rs_to_sk(rs), SOCK_RCVTSTAMP)) {
struct timeval tv = ktime_to_timeval(inc->i_rx_tstamp);
ret = put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
sizeof(struct timeval),
&inc->i_rx_tstamp);
sizeof(tv), &tv);
if (ret)
goto out;
}