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* - use-the-new-percpu-interface-for-shared-data.patch removed from -mm tree
@ 2007-06-06 17:13 akpm
  2007-06-13 18:57 ` [PATCH 2/2]: use the new percpu interface for shared data - version 4 Fenghua Yu
  0 siblings, 1 reply; 2+ messages in thread
From: akpm @ 2007-06-06 17:13 UTC (permalink / raw)
  To: fenghua.yu, clameter, rusty, suresh.b.siddha, mm-commits


The patch titled
     Use the new percpu interface for shared data
has been removed from the -mm tree.  Its filename was
     use-the-new-percpu-interface-for-shared-data.patch

This patch was dropped because it had testing failures

------------------------------------------------------
Subject: Use the new percpu interface for shared data
From: Fenghua Yu <fenghua.yu@intel.com>

Currently most of the per cpu data, which is accessed by different cpus, has a
____cacheline_aligned_in_smp attribute.  Move all this data to the new per cpu
shared data section: .data.percpu.shared_aligned.

This will seperate the percpu data which is referenced frequently by other
cpus from the local only percpu data.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/i386/kernel/init_task.c   |    2 +-
 arch/i386/kernel/irq.c         |    2 +-
 arch/ia64/kernel/smp.c         |    2 +-
 arch/x86_64/kernel/init_task.c |    2 +-
 kernel/sched.c                 |    2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff -puN arch/i386/kernel/init_task.c~use-the-new-percpu-interface-for-shared-data arch/i386/kernel/init_task.c
--- a/arch/i386/kernel/init_task.c~use-the-new-percpu-interface-for-shared-data
+++ a/arch/i386/kernel/init_task.c
@@ -42,5 +42,5 @@ EXPORT_SYMBOL(init_task);
  * per-CPU TSS segments. Threads are completely 'soft' on Linux,
  * no more per-task TSS's.
  */ 
-DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS;
+DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
 
diff -puN arch/i386/kernel/irq.c~use-the-new-percpu-interface-for-shared-data arch/i386/kernel/irq.c
--- a/arch/i386/kernel/irq.c~use-the-new-percpu-interface-for-shared-data
+++ a/arch/i386/kernel/irq.c
@@ -21,7 +21,7 @@
 #include <asm/apic.h>
 #include <asm/uaccess.h>
 
-DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp;
+DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
 EXPORT_PER_CPU_SYMBOL(irq_stat);
 
 DEFINE_PER_CPU(struct pt_regs *, irq_regs);
diff -puN arch/ia64/kernel/smp.c~use-the-new-percpu-interface-for-shared-data arch/ia64/kernel/smp.c
--- a/arch/ia64/kernel/smp.c~use-the-new-percpu-interface-for-shared-data
+++ a/arch/ia64/kernel/smp.c
@@ -82,7 +82,7 @@ static volatile struct call_data_struct 
 #define IPI_KDUMP_CPU_STOP	3
 
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
-static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned;
+static DEFINE_PER_CPU_SHARED_ALIGNED(u64, ipi_operation);
 
 extern void cpu_halt (void);
 
diff -puN arch/x86_64/kernel/init_task.c~use-the-new-percpu-interface-for-shared-data arch/x86_64/kernel/init_task.c
--- a/arch/x86_64/kernel/init_task.c~use-the-new-percpu-interface-for-shared-data
+++ a/arch/x86_64/kernel/init_task.c
@@ -44,7 +44,7 @@ EXPORT_SYMBOL(init_task);
  * section. Since TSS's are completely CPU-local, we want them
  * on exact cacheline boundaries, to eliminate cacheline ping-pong.
  */ 
-DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS;
+DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
 
 /* Copies of the original ist values from the tss are only accessed during
  * debugging, no special alignment required.
diff -puN kernel/sched.c~use-the-new-percpu-interface-for-shared-data kernel/sched.c
--- a/kernel/sched.c~use-the-new-percpu-interface-for-shared-data
+++ a/kernel/sched.c
@@ -304,7 +304,7 @@ struct rq {
 	struct lock_class_key rq_lock_key;
 };
 
-static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp;
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
 static DEFINE_MUTEX(sched_hotcpu_mutex);
 
 static inline int cpu_of(struct rq *rq)
_

Patches currently in -mm which might be from fenghua.yu@intel.com are

use-the-new-percpu-interface-for-shared-data.patch

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2007-06-06 17:13 - use-the-new-percpu-interface-for-shared-data.patch removed from -mm tree akpm
2007-06-13 18:57 ` [PATCH 2/2]: use the new percpu interface for shared data - version 4 Fenghua Yu

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