summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorXin Long <lucien.xin@gmail.com>2016-09-29 02:37:26 +0800
committerDavid S. Miller <davem@davemloft.net>2016-09-30 02:07:05 -0400
commit73dca124cdbad2d67d47d6196c08325f18447d07 (patch)
tree3c25a84f0e3d4e9446f644d4a4e0311a6cf0aeb4
parent1b0ff89852d79354e8a091c81a88df21f5aa9f0a (diff)
downloadlinux-sh-73dca124cdbad2d67d47d6196c08325f18447d07.tar.gz
sctp: move sent_count to the memory hole in sctp_chunk
Now pahole sctp_chunk, it has 2 memory holes: struct sctp_chunk { struct list_head list; atomic_t refcnt; /* XXX 4 bytes hole, try to pack */ ... long unsigned int prsctp_param; int sent_count; /* XXX 4 bytes hole, try to pack */ This patch is to move up sent_count to fill the 1st one and eliminate the 2nd one. It's not just another struct compaction, it also fixes the "netperf- Throughput_Mbps -37.2% regression" issue when overloading the CPU. Fixes: a6c2f792873a ("sctp: implement prsctp TTL policy") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sctp/structs.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index ce93c4b10d26..4f097f538fff 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -554,6 +554,9 @@ struct sctp_chunk {
atomic_t refcnt;
+ /* How many times this chunk have been sent, for prsctp RTX policy */
+ int sent_count;
+
/* This is our link to the per-transport transmitted list. */
struct list_head transmitted_list;
@@ -610,9 +613,6 @@ struct sctp_chunk {
*/
unsigned long prsctp_param;
- /* How many times this chunk have been sent, for prsctp RTX policy */
- int sent_count;
-
/* Which association does this belong to? */
struct sctp_association *asoc;