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Code Issues Releases Wiki Activity

be2net: move txcp field in be_tx_obj to eliminate holes in the struct

Browse source 
Before patch:
struct be_tx_obj {
        u32                        db_offset;            /*     0     4 */

        /* XXX 4 bytes hole, try to pack */

        struct be_queue_info       q;                    /*     8    56 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct be_queue_info       cq;                   /*    64    56 */
        struct be_tx_compl_info    txcp;                 /*   120     4 */

        /* XXX 4 bytes hole, try to pack */

        /* --- cacheline 2 boundary (128 bytes) --- */
        struct sk_buff *           sent_skb_list[2048];  /*   128 16384 */
        ...
}:

After patch:
struct be_tx_obj {
        u32                        db_offset;            /*     0     4 */
        struct be_tx_compl_info    txcp;                 /*     4     4 */
        struct be_queue_info       q;                    /*     8    56 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct be_queue_info       cq;                   /*    64    56 */
        struct sk_buff *           sent_skb_list[2048];  /*   120 16384 */
        ...
};

Signed-off-by: Ivan Vecera <cera@cera.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Vecera 2018-07-10 22:59:45 +02:00 committed by David S. Miller
parent e9c74cd85c
commit 646d2c10aa
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/emulex/benet/be.h
View file

@ -240,9 +240,9 @@ struct be_tx_compl_info {
struct be_tx_obj {
u32 db_offset;
struct be_tx_compl_info txcp;
struct be_queue_info q;
struct be_queue_info cq;
struct be_tx_compl_info txcp;
/* Remember the skbs that were transmitted */
struct sk_buff *sent_skb_list[TX_Q_LEN];
struct be_tx_stats stats;