mirror of
https://github.com/edk2-porting/linux-next.git
synced 2025-01-09 22:24:04 +08:00
1caf8d39c5
struct inet_timewait_death_row uses two cache lines, because we want tw_count to use a full cache line to avoid false sharing. Rework its definition and placement in netns_ipv4 so that: 1) We add 60 bytes of padding after tw_count to avoid false sharing, knowing that tcp_death_row will have ____cacheline_aligned_in_smp attribute. 2) We do not risk padding before tcp_death_row, because we move it at the beginning of netns_ipv4, even if new fields are added later. 3) We do not waste 48 bytes of padding after it. Note that I have not changed dccp. pahole result for struct netns_ipv4 before/after the patch : /* size: 832, cachelines: 13, members: 139 */ /* sum members: 721, holes: 12, sum holes: 95 */ /* padding: 16 */ /* paddings: 2, sum paddings: 55 */ -> /* size: 768, cachelines: 12, members: 139 */ /* sum members: 673, holes: 11, sum holes: 39 */ /* padding: 56 */ /* paddings: 2, sum paddings: 7 */ /* forced alignments: 1 */ Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
||
|---|---|---|
| .. | ||
| bpf.h | ||
| can.h | ||
| conntrack.h | ||
| core.h | ||
| dccp.h | ||
| generic.h | ||
| hash.h | ||
| ieee802154_6lowpan.h | ||
| ipv4.h | ||
| ipv6.h | ||
| mib.h | ||
| mpls.h | ||
| netfilter.h | ||
| nexthop.h | ||
| nftables.h | ||
| packet.h | ||
| sctp.h | ||
| unix.h | ||
| x_tables.h | ||
| xdp.h | ||
| xfrm.h | ||