From: Vladimir Oltean <vladimir.oltean@nxp.com> To: netdev@vger.kernel.org Cc: Jiri Pirko <jiri@resnulli.us>, Pedro Tammela <pctammela@mojatatu.com>, Jamal Hadi Salim <jhs@mojatatu.com>, linux-kernel@vger.kernel.org, Eric Dumazet <edumazet@google.com>, intel-wired-lan@lists.osuosl.org, Cong Wang <xiyou.wangcong@gmail.com>, Peilin Ye <yepeilin.cs@gmail.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, "David S. Miller" <davem@davemloft.net> Subject: [Intel-wired-lan] [PATCH RESEND net-next 4/5] net/sched: taprio: delete misleading comment about preallocating child qdiscs Date: Fri, 2 Jun 2023 13:37:49 +0300 [thread overview] Message-ID: <20230602103750.2290132-5-vladimir.oltean@nxp.com> (raw) In-Reply-To: <20230602103750.2290132-1-vladimir.oltean@nxp.com> As mentioned in commit af7b29b1deaa ("Revert "net/sched: taprio: make qdisc_leaf() see the per-netdev-queue pfifo child qdiscs"") - unlike mqprio, taprio doesn't use q->qdiscs[] only as a temporary transport between Qdisc_ops :: init() and Qdisc_ops :: attach(). Delete the comment, which is just stolen from mqprio, but there, the usage patterns are a lot different, and this is nothing but confusing. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> --- net/sched/sch_taprio.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index 263306fe38d8..cc7ff98e5e86 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -2084,11 +2084,8 @@ static int taprio_init(struct Qdisc *sch, struct nlattr *opt, return -EOPNOTSUPP; } - /* pre-allocate qdisc, attachment can't fail */ - q->qdiscs = kcalloc(dev->num_tx_queues, - sizeof(q->qdiscs[0]), + q->qdiscs = kcalloc(dev->num_tx_queues, sizeof(q->qdiscs[0]), GFP_KERNEL); - if (!q->qdiscs) return -ENOMEM; -- 2.34.1 _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
WARNING: multiple messages have this Message-ID (diff)
From: Vladimir Oltean <vladimir.oltean@nxp.com> To: netdev@vger.kernel.org Cc: "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Jamal Hadi Salim <jhs@mojatatu.com>, Cong Wang <xiyou.wangcong@gmail.com>, Jiri Pirko <jiri@resnulli.us>, Vinicius Costa Gomes <vinicius.gomes@intel.com>, linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>, Peilin Ye <yepeilin.cs@gmail.com>, Pedro Tammela <pctammela@mojatatu.com> Subject: [PATCH RESEND net-next 4/5] net/sched: taprio: delete misleading comment about preallocating child qdiscs Date: Fri, 2 Jun 2023 13:37:49 +0300 [thread overview] Message-ID: <20230602103750.2290132-5-vladimir.oltean@nxp.com> (raw) In-Reply-To: <20230602103750.2290132-1-vladimir.oltean@nxp.com> As mentioned in commit af7b29b1deaa ("Revert "net/sched: taprio: make qdisc_leaf() see the per-netdev-queue pfifo child qdiscs"") - unlike mqprio, taprio doesn't use q->qdiscs[] only as a temporary transport between Qdisc_ops :: init() and Qdisc_ops :: attach(). Delete the comment, which is just stolen from mqprio, but there, the usage patterns are a lot different, and this is nothing but confusing. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> --- net/sched/sch_taprio.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index 263306fe38d8..cc7ff98e5e86 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -2084,11 +2084,8 @@ static int taprio_init(struct Qdisc *sch, struct nlattr *opt, return -EOPNOTSUPP; } - /* pre-allocate qdisc, attachment can't fail */ - q->qdiscs = kcalloc(dev->num_tx_queues, - sizeof(q->qdiscs[0]), + q->qdiscs = kcalloc(dev->num_tx_queues, sizeof(q->qdiscs[0]), GFP_KERNEL); - if (!q->qdiscs) return -ENOMEM; -- 2.34.1
next prev parent reply other threads:[~2023-06-02 10:38 UTC|newest] Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-02 10:37 [Intel-wired-lan] [PATCH RESEND net-next 0/5] Improve the taprio qdisc's relationship with its children Vladimir Oltean 2023-06-02 10:37 ` Vladimir Oltean 2023-06-02 10:37 ` [Intel-wired-lan] [PATCH RESEND net-next 1/5] net/sched: taprio: don't access q->qdiscs[] in unoffloaded mode during attach() Vladimir Oltean 2023-06-02 10:37 ` Vladimir Oltean 2023-06-02 10:37 ` [Intel-wired-lan] [PATCH RESEND net-next 2/5] net/sched: taprio: keep child Qdisc refcount elevated at 2 in offload mode Vladimir Oltean 2023-06-02 10:37 ` Vladimir Oltean 2023-06-06 10:27 ` Paolo Abeni 2023-06-06 10:27 ` [Intel-wired-lan] " Paolo Abeni 2023-06-06 15:56 ` Vladimir Oltean 2023-06-06 15:56 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-07 10:05 ` Paolo Abeni 2023-06-07 10:05 ` Paolo Abeni 2023-06-07 10:16 ` Vladimir Oltean 2023-06-07 10:16 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-02 10:37 ` [Intel-wired-lan] [PATCH RESEND net-next 3/5] net/sched: taprio: try again to report q->qdiscs[] to qdisc_leaf() Vladimir Oltean 2023-06-02 10:37 ` Vladimir Oltean 2023-06-02 10:37 ` Vladimir Oltean [this message] 2023-06-02 10:37 ` [PATCH RESEND net-next 4/5] net/sched: taprio: delete misleading comment about preallocating child qdiscs Vladimir Oltean 2023-06-02 10:37 ` [Intel-wired-lan] [PATCH RESEND net-next 5/5] net/sched: taprio: dump class stats for the actual q->qdiscs[] Vladimir Oltean 2023-06-02 10:37 ` Vladimir Oltean 2023-06-08 18:44 ` Jamal Hadi Salim 2023-06-08 18:44 ` [Intel-wired-lan] " Jamal Hadi Salim 2023-06-09 12:10 ` Vladimir Oltean 2023-06-09 12:10 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-09 14:56 ` Victor Nogueira 2023-06-09 14:56 ` [Intel-wired-lan] " Victor Nogueira 2023-06-10 17:49 ` Vladimir Oltean 2023-06-10 17:49 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-09 16:19 ` Jamal Hadi Salim 2023-06-09 16:19 ` Jamal Hadi Salim 2023-06-09 17:56 ` Vladimir Oltean 2023-06-09 17:56 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-05 12:50 ` [PATCH RESEND net-next 0/5] Improve the taprio qdisc's relationship with its children Vladimir Oltean 2023-06-05 12:50 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-05 13:27 ` Simon Horman 2023-06-05 13:27 ` [Intel-wired-lan] " Simon Horman 2023-06-05 15:44 ` Jamal Hadi Salim 2023-06-05 15:44 ` Jamal Hadi Salim 2023-06-05 16:53 ` Vladimir Oltean 2023-06-05 16:53 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-06 15:39 ` Jamal Hadi Salim 2023-06-06 15:39 ` [Intel-wired-lan] " Jamal Hadi Salim 2023-06-06 16:31 ` Vladimir Oltean 2023-06-06 16:31 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-06 17:42 ` Jamal Hadi Salim 2023-06-06 17:42 ` [Intel-wired-lan] " Jamal Hadi Salim 2023-06-07 10:09 ` Vladimir Oltean 2023-06-07 10:09 ` [Intel-wired-lan] " Vladimir Oltean 2023-06-07 10:30 ` Vladimir Oltean 2023-06-07 10:30 ` [Intel-wired-lan] " Vladimir Oltean
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