From: Thomas Graf Date: Fri, 10 Apr 2015 15:52:36 +0200 Subject: [Intel-wired-lan] [PATCH 0/2 net-next v2] Bring sizeof(net_device) down to < 2K bytes Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: The size of struct net_device crossed the 2K boundary a while ago which is a waste in combination with many net namespaces. This series brings the size of struct net_device down to well below 2K in total size with a typical configuration. Some reserves a several holes leave room for further expansion. Before: /* size: 2176, cachelines: 34, members: 121 */ After: /* size: 1984, cachelines: 31, members: 120 */ Thomas Graf (2): e1000e: Move pm_qos_req to e1000e adapter net_device: Reorder members to fill holes drivers/net/ethernet/intel/e1000e/e1000.h | 1 + drivers/net/ethernet/intel/e1000e/netdev.c | 8 +++--- include/linux/netdevice.h | 46 ++++++++++++++---------------- 3 files changed, 26 insertions(+), 29 deletions(-) --- v2: - Moved pm_qos_req to e1000e adapter entirely as suggested by Daniel - Dropped patch 2 based on comment from Eric. __alignof__ is not reliable to derive alignment of kmalloc returned pointer.