From: Jiri Pirko <jiri@resnulli.us>
To: Ido Schimmel <idosch@idosch.org>
Cc: netdev@vger.kernel.org, davem@davemloft.net,
nhorman@tuxdriver.com, dsahern@gmail.com,
roopa@cumulusnetworks.com, nikolay@cumulusnetworks.com,
jakub.kicinski@netronome.com, toke@redhat.com,
andy@greyhouse.net, f.fainelli@gmail.com, andrew@lunn.ch,
vivien.didelot@gmail.com, mlxsw@mellanox.com,
Ido Schimmel <idosch@mellanox.com>
Subject: Re: [RFC PATCH net-next 08/12] drop_monitor: Initialize timer and work item upon tracing enable
Date: Wed, 24 Jul 2019 11:01:20 +0200 [thread overview]
Message-ID: <20190724090120.GA2225@nanopsycho> (raw)
In-Reply-To: <20190722183134.14516-9-idosch@idosch.org>
Mon, Jul 22, 2019 at 08:31:30PM CEST, idosch@idosch.org wrote:
>From: Ido Schimmel <idosch@mellanox.com>
>
>The timer and work item are currently initialized once during module
>init, but subsequent patches will need to associate different functions
>with the work item, based on the configured alert mode.
>
>Allow subsequent patches to make that change by initializing and
>de-initializing these objects during tracing enable and disable.
>
>This also guarantees that once the request to disable tracing returns,
>no more netlink notifications will be generated.
>
>Signed-off-by: Ido Schimmel <idosch@mellanox.com>
>---
> net/core/drop_monitor.c | 24 +++++++++++++++++++-----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
>diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
>index e68dafaaebcd..2f56a61c43c6 100644
>--- a/net/core/drop_monitor.c
>+++ b/net/core/drop_monitor.c
>@@ -257,13 +257,20 @@ static void trace_napi_poll_hit(void *ignore, struct napi_struct *napi,
>
> static int net_dm_trace_on_set(struct netlink_ext_ack *extack)
> {
>- int rc;
>+ int cpu, rc;
>
> if (!try_module_get(THIS_MODULE)) {
> NL_SET_ERR_MSG_MOD(extack, "Failed to take reference on module");
> return -ENODEV;
> }
>
>+ for_each_possible_cpu(cpu) {
>+ struct per_cpu_dm_data *data = &per_cpu(dm_cpu_data, cpu);
>+
>+ INIT_WORK(&data->dm_alert_work, send_dm_alert);
>+ timer_setup(&data->send_timer, sched_send_work, 0);
So don't you want to remove this initialization from
init_net_drop_monitor?
>+ }
>+
> rc = register_trace_kfree_skb(trace_kfree_skb_hit, NULL);
> if (rc) {
> NL_SET_ERR_MSG_MOD(extack, "Failed to connect probe to kfree_skb() tracepoint");
[...]
next prev parent reply other threads:[~2019-07-24 9:01 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 18:31 [RFC PATCH net-next 00/12] drop_monitor: Capture dropped packets and metadata Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 01/12] drop_monitor: Use correct error code Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 02/12] drop_monitor: Rename and document scope of mutex Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 03/12] drop_monitor: Document scope of spinlock Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 04/12] drop_monitor: Avoid multiple blank lines Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 05/12] drop_monitor: Add extack support Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 06/12] drop_monitor: Use pre_doit / post_doit hooks Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 07/12] drop_monitor: Split tracing enable / disable to different functions Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 08/12] drop_monitor: Initialize timer and work item upon tracing enable Ido Schimmel
2019-07-24 9:01 ` Jiri Pirko [this message]
2019-07-24 17:02 ` Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 09/12] drop_monitor: Require CAP_NET_ADMIN for drop monitor configuration Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 10/12] drop_monitor: Add packet alert mode Ido Schimmel
2019-07-23 12:43 ` Neil Horman
2019-07-23 14:16 ` Ido Schimmel
2019-07-23 15:14 ` Neil Horman
2019-07-24 7:10 ` Ido Schimmel
2019-07-24 12:53 ` Jiri Pirko
2019-07-24 16:57 ` Ido Schimmel
2019-07-29 9:52 ` [drop_monitor] 98ffbd6cd2: will-it-scale.per_thread_ops -17.5% regression kernel test robot
2019-08-05 11:56 ` Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 11/12] drop_monitor: Allow truncation of dropped packets Ido Schimmel
[not found] ` <20190724125537.GC2225@nanopsycho>
2019-07-24 16:49 ` Ido Schimmel
2019-07-22 18:31 ` [RFC PATCH net-next 12/12] drop_monitor: Add a command to query current configuration Ido Schimmel
2019-07-22 19:43 ` [RFC PATCH net-next 00/12] drop_monitor: Capture dropped packets and metadata Toke Høiland-Jørgensen
2019-07-23 6:46 ` Ido Schimmel
2019-07-23 12:17 ` Toke Høiland-Jørgensen
2019-07-23 15:14 ` Ido Schimmel
2019-07-23 15:47 ` David Ahern
2019-07-24 7:57 ` Ido Schimmel
2019-07-23 16:08 ` Toke Høiland-Jørgensen
2019-07-24 8:10 ` Ido Schimmel
2019-07-24 9:51 ` Toke Høiland-Jørgensen
2019-07-24 12:58 ` Jiri Pirko
2019-07-24 16:48 ` Ido Schimmel
2019-07-24 22:48 ` David Miller
2019-07-24 15:15 ` Jiri Pirko
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