Re: [PATCH 17/17] net,act_police,rcu: remove rcu_barrier()

Re: [PATCH 17/17] net,act_police,rcu: remove rcu_barrier()

[Eric Dumazet]

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Re: [PATCH 01/17] cgroup, rcu: convert call_rcu(free_css_set_rcu) to kfree_rcu()

[Paul Menage]

2011/3/15 Lai Jiangshan <laijs@cn.fujitsu.com>:
>
> The rcu callback free_css_set_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(free_css_set_rcu).
>
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: Paul Menage <menage@google.com>

Looks fine, assuming the main kfree_rcu() changes go through.

Paul

Re: [PATCH 02/17] cgroup, rcu: convert call_rcu(free_cgroup_rcu) to kfree_rcu()

[Paul Menage]

2011/3/15 Lai Jiangshan <laijs@cn.fujitsu.com>:
>
> The rcu callback free_cgroup_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(free_cgroup_rcu).
>
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: Paul Menage <menage@google.com>

> ---
> =A0kernel/cgroup.c | =A0 =A09 +--------
> =A01 files changed, 1 insertions(+), 8 deletions(-)
>
> diff --git a/kernel/cgroup.c b/kernel/cgroup.c
> index ad485d4..5c83c91 100644
> --- a/kernel/cgroup.c
> +++ b/kernel/cgroup.c
> @@ -806,13 +806,6 @@ static int cgroup_call_pre_destroy(struct cgroup *cg=
rp)
> =A0 =A0 =A0 =A0return ret;
> =A0}
>
> -static void free_cgroup_rcu(struct rcu_head *obj)
> -{
> - =A0 =A0 =A0 struct cgroup *cgrp =3D container_of(obj, struct cgroup, rc=
u_head);
> -
> - =A0 =A0 =A0 kfree(cgrp);
> -}
> -
> =A0static void cgroup_diput(struct dentry *dentry, struct inode *inode)
> =A0{
> =A0 =A0 =A0 =A0/* is dentry a directory ? if so, kfree() associated cgrou=
p */
> @@ -850,7 +843,7 @@ static void cgroup_diput(struct dentry *dentry, struc=
t inode *inode)
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 */
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0BUG_ON(!list_empty(&cgrp->pidlists));
>
> - =A0 =A0 =A0 =A0 =A0 =A0 =A0 call_rcu(&cgrp->rcu_head, free_cgroup_rcu);
> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 kfree_rcu(cgrp, rcu_head);
> =A0 =A0 =A0 =A0}
> =A0 =A0 =A0 =A0iput(inode);
> =A0}
> --
> 1.7.4
>

Re: [PATCH 03/17] cgroup, rcu: convert call_rcu(__free_css_id_cb) to kfree_rcu()

[Paul Menage]

2011/3/15 Lai Jiangshan <laijs@cn.fujitsu.com>:
>
>
> The rcu callback __free_css_id_cb() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(__free_css_id_cb).
>
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: Paul Menage <menage@google.com>


> ---
> =A0kernel/cgroup.c | =A0 10 +---------
> =A01 files changed, 1 insertions(+), 9 deletions(-)
>
> diff --git a/kernel/cgroup.c b/kernel/cgroup.c
> index 5c83c91..b7d3f6d 100644
> --- a/kernel/cgroup.c
> +++ b/kernel/cgroup.c
> @@ -4612,14 +4612,6 @@ bool css_is_ancestor(struct cgroup_subsys_state *c=
hild,
> =A0 =A0 =A0 =A0return ret;
> =A0}
>
> -static void __free_css_id_cb(struct rcu_head *head)
> -{
> - =A0 =A0 =A0 struct css_id *id;
> -
> - =A0 =A0 =A0 id =3D container_of(head, struct css_id, rcu_head);
> - =A0 =A0 =A0 kfree(id);
> -}
> -
> =A0void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state =
*css)
> =A0{
> =A0 =A0 =A0 =A0struct css_id *id =3D css->id;
> @@ -4634,7 +4626,7 @@ void free_css_id(struct cgroup_subsys *ss, struct c=
group_subsys_state *css)
> =A0 =A0 =A0 =A0spin_lock(&ss->id_lock);
> =A0 =A0 =A0 =A0idr_remove(&ss->idr, id->id);
> =A0 =A0 =A0 =A0spin_unlock(&ss->id_lock);
> - =A0 =A0 =A0 call_rcu(&id->rcu_head, __free_css_id_cb);
> + =A0 =A0 =A0 kfree_rcu(id, rcu_head);
> =A0}
> =A0EXPORT_SYMBOL_GPL(free_css_id);
>
> --
> 1.7.4
>

Re: [PATCH 04/17] net,rcu: convert call_rcu(tcf_common_free_rcu) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 17:57:04 +0800

> 
> 
> The rcu callback tcf_common_free_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(tcf_common_free_rcu).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 05/17] net,rcu: convert call_rcu(tcf_police_free_rcu) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 17:58:00 +0800

> [PATCH 05/17] net,rcu: convert call_rcu(tcf_police_free_rcu) to kfree_rcu()
> 
> The rcu callback tcf_police_free_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(tcf_police_free_rcu).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 06/17] net,rcu: convert call_rcu(in6_dev_finish_destroy_rcu) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 17:59:14 +0800

> 
> 
> The rcu callback in6_dev_finish_destroy_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(in6_dev_finish_destroy_rcu).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 07/17] net,rcu: convert call_rcu(inet6_ifa_finish_destroy_rcu) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 18:00:14 +0800

> 
> 
> The rcu callback inet6_ifa_finish_destroy_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(inet6_ifa_finish_destroy_rcu).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 08/17] net,rcu: convert call_rcu(listeners_free_rcu) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 18:01:42 +0800

> 
> 
> The rcu callback listeners_free_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(listeners_free_rcu).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 11/17] net,rcu: convert call_rcu(sctp_local_addr_free) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 18:05:02 +0800

> 
> 
> The rcu callback sctp_local_addr_free() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(sctp_local_addr_free).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 15/17] net,rcu: convert call_rcu(ha_rcu_free) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 18:08:58 +0800

> 
> 
> The rcu callback ha_rcu_free() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(ha_rcu_free).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 16/17] net,rcu: convert call_rcu(dn_dev_free_ifa_rcu) to kfree_rcu()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 18:10:12 +0800

> 
> The rcu callback dn_dev_free_ifa_rcu() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(dn_dev_free_ifa_rcu).
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 17/17] net,act_police,rcu: remove rcu_barrier()

[David Miller]

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 15 Mar 2011 18:11:46 +0800

> 
> 
> There is no callback of this module maybe queued
> since we use kfree_rcu(), we can safely remove the rcu_barrier().
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>

Acked-by: David S. Miller <davem@davemloft.net>

Re: [PATCH 17/17] net,act_police,rcu: remove rcu_barrier()

[Lai Jiangshan]

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