From: Alexander Lobakin <alobakin@pm.me>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andriin@fb.com>,
Alexander Lobakin <alobakin@pm.me>,
Eric Dumazet <edumazet@google.com>, Wei Wang <weiwan@google.com>,
Cong Wang <cong.wang@bytedance.com>,
Taehee Yoo <ap420073@gmail.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH net-next 1/4] gro: give 'hash' variable in dev_gro_receive() a less confusing name
Date: Fri, 12 Mar 2021 16:21:54 +0000 [thread overview]
Message-ID: <20210312162127.239795-2-alobakin@pm.me> (raw)
In-Reply-To: <20210312162127.239795-1-alobakin@pm.me>
'hash' stores not the flow hash, but the index of the GRO bucket
corresponding to it.
Change its name to 'bucket' to avoid confusion while reading lines
like '__set_bit(hash, &napi->gro_bitmask)'.
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
net/core/dev.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 2bfdd528c7c3..adc42ba7ffd8 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5956,7 +5956,7 @@ static void gro_flush_oldest(struct napi_struct *napi, struct list_head *head)
static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
- u32 hash = skb_get_hash_raw(skb) & (GRO_HASH_BUCKETS - 1);
+ u32 bucket = skb_get_hash_raw(skb) & (GRO_HASH_BUCKETS - 1);
struct list_head *head = &offload_base;
struct packet_offload *ptype;
__be16 type = skb->protocol;
@@ -6024,7 +6024,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
if (pp) {
skb_list_del_init(pp);
napi_gro_complete(napi, pp);
- napi->gro_hash[hash].count--;
+ napi->gro_hash[bucket].count--;
}
if (same_flow)
@@ -6033,10 +6033,10 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
if (NAPI_GRO_CB(skb)->flush)
goto normal;
- if (unlikely(napi->gro_hash[hash].count >= MAX_GRO_SKBS)) {
+ if (unlikely(napi->gro_hash[bucket].count >= MAX_GRO_SKBS)) {
gro_flush_oldest(napi, gro_head);
} else {
- napi->gro_hash[hash].count++;
+ napi->gro_hash[bucket].count++;
}
NAPI_GRO_CB(skb)->count = 1;
NAPI_GRO_CB(skb)->age = jiffies;
@@ -6050,11 +6050,11 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
if (grow > 0)
gro_pull_from_frag0(skb, grow);
ok:
- if (napi->gro_hash[hash].count) {
- if (!test_bit(hash, &napi->gro_bitmask))
- __set_bit(hash, &napi->gro_bitmask);
- } else if (test_bit(hash, &napi->gro_bitmask)) {
- __clear_bit(hash, &napi->gro_bitmask);
+ if (napi->gro_hash[bucket].count) {
+ if (!test_bit(bucket, &napi->gro_bitmask))
+ __set_bit(bucket, &napi->gro_bitmask);
+ } else if (test_bit(bucket, &napi->gro_bitmask)) {
+ __clear_bit(bucket, &napi->gro_bitmask);
}
return ret;
--
2.30.2
next prev parent reply other threads:[~2021-03-12 16:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-12 16:21 [PATCH net-next 0/4] gro: micro-optimize dev_gro_receive() Alexander Lobakin
2021-03-12 16:21 ` Alexander Lobakin [this message]
2021-03-12 16:21 ` [PATCH net-next 2/4] gro: don't dereference napi->gro_hash[x] multiple times in dev_gro_receive() Alexander Lobakin
2021-03-12 16:47 ` Eric Dumazet
2021-03-12 18:36 ` Alexander Lobakin
2021-03-12 16:22 ` [PATCH net-next 3/4] gro: simplify gro_list_prepare() Alexander Lobakin
2021-03-12 16:22 ` [PATCH net-next 4/4] gro: improve flow distribution across GRO buckets in dev_gro_receive() Alexander Lobakin
2021-03-12 16:33 ` Eric Dumazet
2021-03-12 18:28 ` Alexander Lobakin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210312162127.239795-2-alobakin@pm.me \
--to=alobakin@pm.me \
--cc=andriin@fb.com \
--cc=ap420073@gmail.com \
--cc=ast@kernel.org \
--cc=cong.wang@bytedance.com \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=weiwan@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.