mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 15:40:53 +07:00
22fc6eccbf
____cacheline_maxaligned_in_smp is currently used to align critical structures and avoid false sharing. It uses per-arch L1_CACHE_SHIFT_MAX and people find L1_CACHE_SHIFT_MAX useless. However, we have been using ____cacheline_maxaligned_in_smp to align structures on the internode cacheline size. As per Andi's suggestion, following patch kills ____cacheline_maxaligned_in_smp and introduces INTERNODE_CACHE_SHIFT, which defaults to L1_CACHE_SHIFT for all arches. Arches needing L3/Internode cacheline alignment can define INTERNODE_CACHE_SHIFT in the arch asm/cache.h. Patch replaces ____cacheline_maxaligned_in_smp with ____cacheline_internodealigned_in_smp With this patch, L1_CACHE_SHIFT_MAX can be killed Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/init.h>
|
|
#include <linux/init_task.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mqueue.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/desc.h>
|
|
|
|
static struct fs_struct init_fs = INIT_FS;
|
|
static struct files_struct init_files = INIT_FILES;
|
|
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
|
|
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
|
|
struct mm_struct init_mm = INIT_MM(init_mm);
|
|
|
|
EXPORT_SYMBOL(init_mm);
|
|
|
|
/*
|
|
* Initial thread structure.
|
|
*
|
|
* We need to make sure that this is THREAD_SIZE aligned due to the
|
|
* way process stacks are handled. This is done by having a special
|
|
* "init_task" linker map entry..
|
|
*/
|
|
union thread_union init_thread_union
|
|
__attribute__((__section__(".data.init_task"))) =
|
|
{ INIT_THREAD_INFO(init_task) };
|
|
|
|
/*
|
|
* Initial task structure.
|
|
*
|
|
* All other task structs will be allocated on slabs in fork.c
|
|
*/
|
|
struct task_struct init_task = INIT_TASK(init_task);
|
|
|
|
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;
|
|
|