2015-11-01 06:24:41

by Saurabh Sengar

[permalink] [raw]
Subject: [PATCH] IB/ipoib: optimized the function ipoib_mcast_alloc

ipoib_mcast_alloc is called only in atomic context,
hence removing the extra check.

Signed-off-by: Saurabh Sengar <[email protected]>
---
Hi,
Even if in future, if there are some functions expected to call it in normal context(not atomic),
we can pass the GFP_KERNEL or GFP_ATOMIC directly to function call instead of passing 0 and 1,
which later again need to be compared in order to change it to GFP_KERNEL and GFP_ATOMIC.
Please let me know if there are better ways to improve it.

drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index d750a86..15d35be 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -132,12 +132,11 @@ void ipoib_mcast_free(struct ipoib_mcast *mcast)
kfree(mcast);
}

-static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
- int can_sleep)
+static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev)
{
struct ipoib_mcast *mcast;

- mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
+ mcast = kzalloc(sizeof *mcast, GFP_ATOMIC);
if (!mcast)
return NULL;

@@ -573,7 +572,7 @@ void ipoib_mcast_join_task(struct work_struct *work)
if (!priv->broadcast) {
struct ipoib_mcast *broadcast;

- broadcast = ipoib_mcast_alloc(dev, 0);
+ broadcast = ipoib_mcast_alloc(dev);
if (!broadcast) {
ipoib_warn(priv, "failed to allocate broadcast group\n");
/*
@@ -728,7 +727,7 @@ void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n",
mgid);

- mcast = ipoib_mcast_alloc(dev, 0);
+ mcast = ipoib_mcast_alloc(dev);
if (!mcast) {
ipoib_warn(priv, "unable to allocate memory "
"for multicast structure\n");
@@ -886,7 +885,7 @@ void ipoib_mcast_restart_task(struct work_struct *work)
ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n",
mgid.raw);

- nmcast = ipoib_mcast_alloc(dev, 0);
+ nmcast = ipoib_mcast_alloc(dev);
if (!nmcast) {
ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
continue;
--
1.9.1


2015-11-02 10:08:28

by Erez Shitrit

[permalink] [raw]
Subject: Re: [PATCH] IB/ipoib: optimized the function ipoib_mcast_alloc

On Sun, Nov 1, 2015 at 8:23 AM, Saurabh Sengar <[email protected]> wrote:
> ipoib_mcast_alloc is called only in atomic context,
> hence removing the extra check.
>
> Signed-off-by: Saurabh Sengar <[email protected]>

Acked-by: Erez Shitrit <[email protected]>

> ---
> Hi,
> Even if in future, if there are some functions expected to call it in normal context(not atomic),
> we can pass the GFP_KERNEL or GFP_ATOMIC directly to function call instead of passing 0 and 1,
> which later again need to be compared in order to change it to GFP_KERNEL and GFP_ATOMIC.
> Please let me know if there are better ways to improve it.
>
> drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
> index d750a86..15d35be 100644
> --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
> +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
> @@ -132,12 +132,11 @@ void ipoib_mcast_free(struct ipoib_mcast *mcast)
> kfree(mcast);
> }
>
> -static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
> - int can_sleep)
> +static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev)
> {
> struct ipoib_mcast *mcast;
>
> - mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
> + mcast = kzalloc(sizeof *mcast, GFP_ATOMIC);
> if (!mcast)
> return NULL;
>
> @@ -573,7 +572,7 @@ void ipoib_mcast_join_task(struct work_struct *work)
> if (!priv->broadcast) {
> struct ipoib_mcast *broadcast;
>
> - broadcast = ipoib_mcast_alloc(dev, 0);
> + broadcast = ipoib_mcast_alloc(dev);
> if (!broadcast) {
> ipoib_warn(priv, "failed to allocate broadcast group\n");
> /*
> @@ -728,7 +727,7 @@ void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
> ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n",
> mgid);
>
> - mcast = ipoib_mcast_alloc(dev, 0);
> + mcast = ipoib_mcast_alloc(dev);
> if (!mcast) {
> ipoib_warn(priv, "unable to allocate memory "
> "for multicast structure\n");
> @@ -886,7 +885,7 @@ void ipoib_mcast_restart_task(struct work_struct *work)
> ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n",
> mgid.raw);
>
> - nmcast = ipoib_mcast_alloc(dev, 0);
> + nmcast = ipoib_mcast_alloc(dev);
> if (!nmcast) {
> ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
> continue;
> --
> 1.9.1
>
> --
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