From: Thomas Graf <tgraf@suug.ch>
To: davem@davemloft.net
Cc: jeffrey.t.kirsher@intel.com, intel-wired-lan@lists.osuosl.org,
netdev@vger.kernel.org, eric.dumazet@gmail.com,
daniel@iogearbox.net
Subject: [PATCH 0/2 net-next v2] Bring sizeof(net_device) down to < 2K bytes
Date: Fri, 10 Apr 2015 15:52:36 +0200 [thread overview]
Message-ID: <cover.1428672434.git.tgraf@suug.ch> (raw)
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.
next reply other threads:[~2015-04-10 13:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-10 13:52 Thomas Graf [this message]
2015-04-10 13:52 ` [PATCH 1/2 net-next] e1000e: Move pm_qos_req to e1000e adapter Thomas Graf
2015-04-10 15:59 ` Jeff Kirsher
2015-04-10 13:52 ` [PATCH 2/2 net-next] net_device: Reorder members to fill holes Thomas Graf
2015-04-10 19:39 ` Eric Dumazet
2015-04-13 17:15 ` [PATCH 0/2 net-next v2] Bring sizeof(net_device) down to < 2K bytes David Miller
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