sched: reorder lb_env struct members to reduce its size
PATCH 1/1 sched: reorder lb_env struct members to reduce its size
Members of lb_env struct are not in appropriate order to reuse compiler added padding on 64bit architectures. In this patch we reorder those struct members and help reduce the size of the structure from 96 bytes to 80 bytes on 64 bit architectures.
---
kernel/sched/fair.c +2 -2
@@ -3102,18 +3102,18 @@ static unsigned long __read_mostly max_load_balance_interval = HZ/10;struct lb_env {struct sched_domain *sd; -int src_cpu;struct rq *src_rq; +int src_cpu;int dst_cpu;struct rq *dst_rq;enum cpu_idle_type idle;long imbalance; -unsigned int flags;struct list_head *tasks; +unsigned int flags;unsigned int loop;unsigned int loop_break;unsigned int loop_max;
[tip:sched/core] sched: Reorder 'struct lb_env' members to reduce its size
Commit-ID: 95f302e4d0833dd604210fbb415629ac3662cd39 Gitweb: http://git.kernel.org/tip/95f302e4d0833dd604210fbb415629ac3662cd39 Author: Prashanth Nageshappa <[email protected]> AuthorDate: Tue, 19 Jun 2012 17:47:34 +0530 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 5 Jul 2012 21:09:08 +0200
sched: Reorder 'struct lb_env' members to reduce its size
Members of 'struct lb_env' are not in appropriate order to reuse compiler added padding on 64bit architectures. In this patch we reorder those struct members and help reduce the size of the structure from 96 bytes to 80 bytes on 64 bit architectures.
--- kernel/sched/fair.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
kernel/sched/fair.c +2 -2
@@ -3088,18 +3088,18 @@ static unsigned long __read_mostly max_load_balance_interval = HZ/10;struct lb_env {struct sched_domain *sd; -int src_cpu;struct rq *src_rq; +int src_cpu;int dst_cpu;struct rq *dst_rq;enum cpu_idle_type idle;long imbalance; -unsigned int flags;struct list_head *tasks; +unsigned int flags;unsigned int loop;unsigned int loop_break;unsigned int loop_max;
[tip:sched/core] sched: Reorder 'struct lb_env' members to reduce its size
In reply to Prashanth NageshappaCommit-ID: 85c1e7dae165acd004429f81fe52bfbf55b57a98 Gitweb: http://git.kernel.org/tip/85c1e7dae165acd004429f81fe52bfbf55b57a98 Author: Prashanth Nageshappa <[email protected]> AuthorDate: Tue, 19 Jun 2012 17:47:34 +0530 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 24 Jul 2012 13:55:20 +0200
sched: Reorder 'struct lb_env' members to reduce its size
Members of 'struct lb_env' are not in appropriate order to reuse compiler added padding on 64bit architectures. In this patch we reorder those struct members and help reduce the size of the structure from 96 bytes to 80 bytes on 64 bit architectures.
--- kernel/sched/fair.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
kernel/sched/fair.c +1 -1
@@ -3058,8 +3058,8 @@ static unsigned long __read_mostly max_load_balance_interval = HZ/10;struct lb_env {struct sched_domain *sd; -int src_cpu;struct rq *src_rq; +int src_cpu;int dst_cpu;struct rq *dst_rq;