2018-07-09 13:52:34

by Jan Dakinevich

Subject: [PATCH] IPoIB: use kvzalloc to allocate an array of bucket pointers

This table by default takes 32KiB which is 3rd memory order. Meanwhile,
this memory is not aimed for DMA operation and could be safely allocated
by vmalloc.

Signed-off-by: Jan Dakinevich <[email protected]>
---
drivers/infiniband/ulp/ipoib/ipoib_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 26cde95..cb752df 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -1526,7 +1526,7 @@ static int ipoib_neigh_hash_init(struct ipoib_dev_priv *priv)
return -ENOMEM;
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
size = roundup_pow_of_two(arp_tbl.gc_thresh3);
- buckets = kcalloc(size, sizeof(*buckets), GFP_KERNEL);
+ buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL);
if (!buckets) {
kfree(htbl);
return -ENOMEM;
@@ -1554,7 +1554,7 @@ static void neigh_hash_free_rcu(struct rcu_head *head)
struct ipoib_neigh __rcu **buckets = htbl->buckets;
struct ipoib_neigh_table *ntbl = htbl->ntbl;

- kfree(buckets);
+ kvfree(buckets);
kfree(htbl);
complete(&ntbl->deleted);
}
--
2.1.4

2018-07-16 16:22:27

by Jan Dakinevich

Subject: Re: [PATCH] IPoIB: use kvzalloc to allocate an array of bucket pointers

On Mon, 9 Jul 2018 16:51:03 +0300
Jan Dakinevich <[email protected]> wrote:

> This table by default takes 32KiB which is 3rd memory order.
> Meanwhile, this memory is not aimed for DMA operation and could be
> safely allocated by vmalloc.
>
> Signed-off-by: Jan Dakinevich <[email protected]>
> ---
> drivers/infiniband/ulp/ipoib/ipoib_main.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c
> b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 26cde95..cb752df
> 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
> +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
> @@ -1526,7 +1526,7 @@ static int ipoib_neigh_hash_init(struct
> ipoib_dev_priv *priv) return -ENOMEM;
> set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
> size = roundup_pow_of_two(arp_tbl.gc_thresh3);
> - buckets = kcalloc(size, sizeof(*buckets), GFP_KERNEL);
> + buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL);
> if (!buckets) {
> kfree(htbl);
> return -ENOMEM;
> @@ -1554,7 +1554,7 @@ static void neigh_hash_free_rcu(struct rcu_head
> *head) struct ipoib_neigh __rcu **buckets = htbl->buckets;
> struct ipoib_neigh_table *ntbl = htbl->ntbl;
>
> - kfree(buckets);
> + kvfree(buckets);
> kfree(htbl);
> complete(&ntbl->deleted);
> }

ping

--
Best regards
Jan Dakinevich

2018-07-16 18:20:42

by Haakon Bugge

Subject: Re: [PATCH] IPoIB: use kvzalloc to allocate an array of bucket pointers

> On 16 Jul 2018, at 18:19, Jan Dakinevich <[email protected]> wrote:
>
> On Mon, 9 Jul 2018 16:51:03 +0300
> Jan Dakinevich <[email protected]> wrote:
>
>> This table by default takes 32KiB which is 3rd memory order.

Only if PAGE_SIZE is 4KiB...

>> Meanwhile, this memory is not aimed for DMA operation and could be
>> safely allocated by vmalloc.
>>
>> Signed-off-by: Jan Dakinevich <[email protected]>

lgtm,

Reviewed-by: Håkon Bugge <[email protected]>


Thxs, Håkon

>> ---
>> drivers/infiniband/ulp/ipoib/ipoib_main.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c
>> b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 26cde95..cb752df
>> 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
>> +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
>> @@ -1526,7 +1526,7 @@ static int ipoib_neigh_hash_init(struct
>> ipoib_dev_priv *priv) return -ENOMEM;
>> set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
>> size = roundup_pow_of_two(arp_tbl.gc_thresh3);
>> - buckets = kcalloc(size, sizeof(*buckets), GFP_KERNEL);
>> + buckets = kvcalloc(size, sizeof(*buckets), GFP_KERNEL);
>> if (!buckets) {
>> kfree(htbl);
>> return -ENOMEM;
>> @@ -1554,7 +1554,7 @@ static void neigh_hash_free_rcu(struct rcu_head
>> *head) struct ipoib_neigh __rcu **buckets = htbl->buckets;
>> struct ipoib_neigh_table *ntbl = htbl->ntbl;
>>
>> - kfree(buckets);
>> + kvfree(buckets);
>> kfree(htbl);
>> complete(&ntbl->deleted);
>> }
>
> ping
>
> --
> Best regards
> Jan Dakinevich
> --
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2018-07-23 21:41:08

by Jason Gunthorpe

Subject: Re: [PATCH] IPoIB: use kvzalloc to allocate an array of bucket pointers

On Mon, Jul 09, 2018 at 04:51:03PM +0300, Jan Dakinevich wrote:
> This table by default takes 32KiB which is 3rd memory order. Meanwhile,
> this memory is not aimed for DMA operation and could be safely allocated
> by vmalloc.
>
> Signed-off-by: Jan Dakinevich <[email protected]>
> Reviewed-by: Håkon Bugge <[email protected]>
> ---
> drivers/infiniband/ulp/ipoib/ipoib_main.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)

Applied to for-next, thanks

Jason