The Linux Kernel study of ARMv7 3.13.0 (exynos 5420)

Community name: neuromancer.kr
Target Soc : Samsung Exynos 5420 (ARMv7 A7&A15 bigLITTLE )
Kernel version: Linux kernel 3.13.x

1st: 3.10.x, A bootstrab before start_kernel(): 3.10.x
2nd: start_kernel()->mm_init: 3.13.x

The history of Linux kernel study

191th (2017/12/25) week 191차

rest_init()

190th (2017/10/25) week 190차

rest_init()

189th (2017/10/18) week 189차

rest_init()

188th (2017/10/11) week 188차

rest_init()
schedule_preempt_disabled 1892 init/main.c
schedule 3968 sched/core.c
__schedule 3935 sched/core.c
context_switch 3881 kernel/sched/core.c
ret_from_fork 3190 kernel/sched/core.c
kernel_init 119 arch/arm/kernel/entry-common.S
kernel_init_freeable 2589 init/main.c
wait_for_completion 2636 init/main.c
wait_for_common 190 kernel/sched/completion.c
__wait_for_common 166 kernel/sched/completion.c
do_wait_for_common 155 kernel/sched/completion.c
schedule_timeout 128 kernel/sched/completion.c
schedule 1680 kernel/timer.c
__schedule 3935 kernel/sched/core.c
deactivate_task 3764 kernel/sched/core.c
dequeue_task 1228 kernel/sched/core.c
dequeue_task_fair 1071 kernel/sched/core.c
dequeue_entity 5135 dequeue_entity(cfs_rq, se, flags);
update_curr 3757 update_curr(cfs_rq);
update_min_vruntime 1256 update_min_vruntime(cfs_rq);

187th (2017/09/13) week 187차

rest_init()
schedule_preempt_disabled 1892 init/main.c
schedule 3968 sched/core.c
__schedule 3935 sched/core.c
context_switch 3881 kernel/sched/core.c
ret_from_fork 3190 kernel/sched/core.c
kernel_init 119 arch/arm/kernel/entry-common.S
kernel_init_freeable 2589 init/main.c
wait_for_completion 2636 init/main.c
wait_for_common 190 kernel/sched/completion.c
__wait_for_common 166 kernel/sched/completion.c
do_wait_for_common 155 kernel/sched/completion.c
schedule_timeout 128 kernel/sched/completion.c
schedule 1680 kernel/timer.c
__schedule 3935 kernel/sched/core.c
deactivate_task 3764 kernel/sched/core.c
dequeue_task 1228 kernel/sched/core.c
dequeue_task_fair 1071 kernel/sched/core.c
dequeue_entity 5135 dequeue_entity(cfs_rq, se, flags);
update_curr 3757 update_curr(cfs_rq);
update_min_vruntime 1256 update_min_vruntime(cfs_rq);

186th (2017/09/08) week 186차

rest_init()
- schedule_preempt_disabled 1891 ~/init/main.c
- schedule 3813 kernel/sched/core.c
- __schedule 3785 kernel/sched/core.c
- context_switch 3741 context_switch(rq, prev, next); /* unlocks the rq */
- switch_to 3085 switch_to(prev, next, prev);
- __switch_to 32 arch/arm/include/asm/switch_to.h

185th (2017/08/30) week 185차

rest_init()
schedule_preempt_disabled 1891 ~/init/main.c
schedule 3813 kernel/sched/core.c
__schedule 3785 kernel/sched/core.c
context_switch 3741 context_switch(rq, prev, next); /* unlocks the rq */
switch_to 3085 switch_to(prev, next, prev);

184th (2017/08/23) week 184차

rest_init()

183th (2017/08/19) week 183차

rest_init()

182th (2017/08/12) week 182차

rest_init()

181th (2017/07/29) week 181차

rest_init()

180th (2017/07/20) week 180차

rest_init()

179th (2017/07/15) week 179차

rest_init()

178th (2017/07/01) week 178차

rest_init()

177th (2017/06/24) week 177차

rest_init()

176th (2017/06/17) week 176차

rest_init()

175th (2017/06/10) week 175차

rest_init()

174th (2017/05/20) week 174차

rest_init()

173th (2017/05/13) week 173차

rest_init()

172th (2017/04/27) week 172차

rest_init()

171th (2017/04/19) week 171차

rest_init()

170th (2017/04/10) week 170차

rest_init()

169th (2017/02/08) week 169차

rest_init()

168th (2017/02/01) week 168차

rest_init()

167th (2016/12/17) week 167차

rest_init()

166th (2016/12/10) week 166차

rest_init()

165th (2016/12/03) week 165차

rest_init()

164th (2016/11/27) week 164차

rest_init()

163th (2016/11/12) week 163차

rest_init()

162th (2016/11/05) week 162차

rest_init()

161th (2016/10/29) week 161차

rest_init()

160th (2016/10/15) week 160차

rest_init()

159th (2016/10/09) week 159차

rest_init()

158th (2016/09/10) week 158차

rest_init()

157th (2016/09/03) week 157차

rest_init()

156th (2016/08/27) week 156차

cgroup_init()

155th (2016/08/20) week 155차

cgroup_init()

154th (2016/08/13) week 154차

cgroup_init()

153th (2016/07/30) week 153차

cgroup_init()

152th (2016/07/23) week 152차

cgroup_init()

151th (2016/07/16) week 151차

proc_root_init()
cgroup_init()

150th (2016/07/09) week 150차

proc_root_init()

149th (2016/07/02) week 149차

proc_root_init()

148th (2016/06/25) week 148차

proc_root_init()

147th (2016/06/11) week 147차

proc_root_init()
- proc_init_inodecache()
- register_filesystem()
- proc_self_init()
- proc_symlink()
- proc_net_init()

146th (2016/06/04) week 146차

page_writeback_init()
writeback_set_ratelimit()
register_cpu_notifier()
proc_root_init()
- proc_init_inodecache()
- register_filesystem()
- proc_self_init()
- proc_symlink()

145th (2016/05/28) week 145차

vfs_caches_init()
signals_init()
page_writeback_init()
- write_set_rate_limit()

144th (2016/05/21) week 144차

vfs_caches_init()
- kmem_cache_create(): names_cache
- dcache_init()
- inode_init()
- files_init()
- mnt_init()
- bdev_cache_init()
- chrdev_init()

143th (2016/05/14) week 143차

vfs_caches_init()
mnt_init()

142th (2016/04/30) week 142차

vfs_caches_init()
mnt_init()
init_mount_tree()

141th (2016/04/23) week 141차

vfs_caches_init()
mnt_init()
init_mount_tree()

140th (2016/04/16) week 140차

vfs_caches_init()
mnt_init()
init_mount_tree()

139th (2016/04/09) week 139차

vfs_caches_init()
mnt_init()
init_mount_tree()

138th (2016/04/02) week 138차

vfs_caches_init()
mnt_init()
init_mount_tree()

137th (2016/03/26) week 137차

vfs_caches_init()
mnt_init()
init_rootfs()

136th (2016/03/19) week 136차

vfs_caches_init()
mnt_init()
init_rootfs()
shmem_init()

135th (2016/03/05) week 135차

vfs_caches_init()
mnt_init()
init_rootfs()
shmem_init()

134th (2016/02/27) week 134차

vfs_caches_init()
mnt_init()
init_rootfs()
shmem_init()

133th (2016/02/20) week 133차

vfs_caches_init()
mnt_init()
init_rootfs()
shmem_init()

132th (2016/02/13) week 132차

vfs_caches_init()
mnt_init()
init_rootfs()
shmem_init()

131th (2016/01/23) week 131차

vfs_caches_init()
mnt_init()

130th (2016/01/16) week 130차

vfs_caches_init()
mnt_init()

129th (2016/01/09) week 129차

vfs_caches_init()
mnt_init()

128th (2015/12/19) week 128차

vfs_caches_init()
mnt_init()
- sysfs_init()

127th (2015/12/12) week 127차

vfs_caches_init()
mnt_init()
- sysfs_init()

126th (2015/12/05) week 126차

vfs_caches_init()
mnt_init()
- sysfs_init()

125th (2015/11/27) week 125차

vfs_caches_init()
mnt_init()
- sysfs_init()

124th (2015/11/21) week 124차

vfs_caches_init()
- mnt_init()
  - sysfs_init()

123th (2015/11/14) week 123차

vfs_caches_init()
mnt_init()
- sysfs_init()

122th (2015/11/07) week 122차

vfs_caches_init()

121th (2015/10/31) week 121차

vfs_caches_init()

120th (2015/10/24) week 120차

vfs_caches_init()

119th (2015/10/10) week 119차

buffer_init()
- buffer_head 를 사용하기 위한 kmem_cache 할당자 및 max_buffer_heads 값 초기화 수행
key_init()
- null funtion()
security_init()
- null function()
dbg_late_init()
- null function()
vfs_caches_init()

118th (2015/10/03) week 118차

proc_caches_init()
- sighand_struct, signal_struct, files_struct, fs_struct, mm_struct, vm_area_struct, nsproxy를
- 사용하기 위한 kmem_cache 할당자 및 percpu list 초기화 수행

117th (2015/09/19) week 117차

anon_vma_init();
- anon vma 를 사용하기 위한 kmem_cache 할당자 초기화 수행
thread_info_cache_init();
- null function
cred_init();
- credentials 를 사용하기 위한 kmem_cache 할당자 초기화 수행
fork_init(totalram_pages);
- totalram_pages: 총 free된 page 수
- task_struct 를 사용하기 위한 kmem_cache 할당자 초기화 수행
- max_threads값을 계산하여 init_task에 threads값의 limit 값 설정함

116th (2015/09/12) week 116차

pidmap_init()

115th (2015/08/22) week 115차

cgroup_early_init() 분석

114th (2015/08/15) week 114차

cgorup 초기 초기화 분석
cgroup_early_init()

113th (2015/08/08) week 113차

cgorup 초기 초기화 분석
cgroup_early_init()

112th (2015/08/01) week 112차

cgroup 에 대한 이야기
LXC와 Docker 기술
SS의 G6의 kernel config 를 참조하여 cgroup config를 설정.
config 추가: Reference/exynos7420-zerolte_kor_skc_defconfig
pageconsole_init()

111th (2015/07/25) week 111차

console_init()
con_init()

110th (2015/07/18) week 110차

console_init()
con_init()

109th (2015/07/11) week 109차

console_init()
con_init()

108th (2015/07/04) week 108차

parse_args() 복습
console_init()->con_init()
console_init()->s3c24xx_serial_console_init()

107th (2015/06/27) week 107차

console_init()

106th (2015/06/20) week 106차

sched_clock_postinit();
perf_event_init();
profile_init();
call_function_init();
irqs_disabled()
local_irq_enable();
kmem_cache_init_late();

105th (2015/06/13) week 105차

sched_clock_postinit();

104th (2015/06/06) week 104차

sched_clock_postinit();

103th (2015/05/30) week 103차

sched_clock_postinit();

102th (2015/05/23) week 102차

time_init()
- timer 를 사용하기 위한 clk source, clk_table 메모리 할당 및 초기화,
- timer event를 위한 timer irq (MCT) 초기화 수행

101th (2015/05/16) week 101차
100th (2015/05/09) week 101차
Temp. (2015/04/25) week temp

NIPA 5층 대강당, 12차 Iamroot OT.
개발에 대한 자유토론. (IoT, 3D/4D Printing, 라즈베리파이2, 오드로이드...)

99th (2015/04/19) week 99차
98th (2015/04/11) week 98차
97th (2015/04/04) week 97차
96th (2015/03/28) week 96차

start_kernel()->time_init()->clocksource_of_init()->mct_init_spi()->mct_init_dt()->irq_of_parse_and_map()

95th (2015/03/21) week 95차

start_kernel()->time_init()->clocksource_of_init()->mct_init_spi()->mct_init_dt()->irq_of_parse_and_map()->of_irq_parse_one()->of_irq_parse_raw()

94th (2015/03/14) week 94차

start_kernel()->time_init()->clocksource_of_init()->mct_init_spi()->mct_init_dt()->irq_of_parse_and_map()

93th (2015/03/07) week 93차

start_kernel()->time_init()->of_clk_init()
start_kernel()->time_init()->clocksource_of_init()->mct_init_spi()->mct_init_dt()->irq_of_parse_and_map()

92th (2015/02/28) week 92차

start_kernel()->time_init()->of_clk_init()

91th (2015/02/21) week 91차

start_kernel()->time_init()->of_clk_init()

90th (2015/02/07) week 90차

start_kernel()->time_init()->of_clk_init()

89th (2015/01/31) week 89차

start_kernel()->time_init()->of_clk_init()

88th (2015/01/24) week 88차

start_kernel()->time_init()->of_clk_init()

87th (2015/01/17) week 87차

start_kernel()->time_init()->of_clk_init()

86th (2015/01/10) week 86차

start_kernel()->time_init()->of_clk_init()

85th (2015/01/03) week 85차

start_kernel()->time_init()->of_clk_init()

84th (2014/12/27) week 84차

start_kernel()->time_init()->of_clk_init()

83th (2014/12/20) week 83차
82th (2014/12/13) week 82차
81th (2014/12/06) week 81차

init_IRQ()->...->kfree()

80th (2014/11/29) week 80차

init_IRQ()->...->gic_of_init()->gic_of_bases()
irqchip_init()

79th (2014/11/22) week 79차

init_IRQ()->...->gic_of_init()->gic_of_bases()

78th (2014/11/15) week 78차

init_IRQ()->...->gic_of_init()
Radix-tree

77th (2014/11/08) week 77차

init_IRQ()->...->gic_of_init()

76th (2014/11/01) week 76차

init_IRQ()

75th (2014/10/25) week 75차

init_IRQ()
RBTree 알고리즘 분석

74th (2014/10/18) week 74차

init_IRQ()

73th (2014/10/11) week 73차

init_IRQ()

72th (2014/10/04) week 72차
71th (2014/09/27) week 71차
70th (2014/09/20) week 70차
69th (2014/09/13) week 69차

sched_init()를 계속 분석
sched_init()::for_each_possible_cpu(i) { ... }
sched_init()->set_load_weight()
sched_init()->plist_head_init()
sched_init()->init_idle()
sched_init()->zalloc_cpumask_var()

68th (2014/08/30) week 68차

sched_init()를 계속 분석
sched_init()->init_defrootdomain()
// def_root_domain의 맴버 값을 초기화 수행
sched_init()->init_rt_bandwidth(&def_rt_bandwidth, global_rt_period(), global_rt_runtime());
sched_init()::for_each_possible_cpu(i) { ... }

67th (2014/08/23) week 67차

mm_init() 복습
slub()　복습

66th (2014/08/16) week 66차

mm_init() 복습;
buddy 까지 복습 (mem_init())

65th (2014/08/09) week 65차

start_kernel()-> mm_init()-> vmalloc_init();
vmlist에 등록된 vm struct 들을 slab으로 이관하고 RB Tree로 구성

64th (2014/07/26) week 64차

start_kernel()-> mm_init()-> kmem_cache_init()
start_kernel()-> mm_init()-> percpu_init_late()
start_kernel()-> mm_init()-> pgtable_cache_init()

63th (2014/07/19) week 63차

mm_init()->kmem_cache_init()->bootstrab(&boot_kmem_cache_node)

62th (2014/07/12) week 62차

mm_init()->kmem_cache_init()->bootstrab(&boot_kmem_cache)

61th (2014/07/05) week 61차
60th (2014/06/28) week 60차
59th (2014/06/21) week 59차
58th (2014/06/14) week 58차
57th (2014/06/07) week 57차

start_kernel()->mm_init()->kmem_cache_init()->create_boot_cache()
slab_state는 slab이 어느정도 활성화 되었는지를 나타낸다.
지금까지 // slab_state: DOWN 에서 분석을 했고,
이제는 slab_state = PARTIAL; 로 바뀌어 분석을 한다.
여기서 // slab_state의 의미는 slab을 초기화한 단계를 의미한다.
slab_stat = PARTIAL은 kmem_cache_node만 사용이 가능을 의미한다.
계속해서 slab_stat = PARTIAL로 해서 create_boot_cache를 다시 실행한다.

56th (2014/05/31) week 56차

start_kernel()->mm_init()->kmem_cache_init()->create_boot_cache()
init_kmem_cache_nodes는 slab으로 사용할 page를 할당받아 설정값(slab_cache, flags, freelist, inuse, frozen)을 바꿔준다.
이후 할당받은 slab object를 kmem_cache_node로 사용하며,
kmem_cache_node의 맴버 속성을 초기화합니다.
초기화되는 맴버속성은 (nr_partial, list_lock, slabs, full)가 있습니다.

55th (2014/05/24) week 55차

start_kernel()->mm_init()->kmem_cache_init()->create_boot_cache()
new_slab()

54th (2014/05/17) week 54차

buddy할당자에 이어서 kmem 할당자 (Slub)을 분석중입니다.
mem_init()->kmem_cache_init()->create_boot_cache()->__kmem_cache_create() ->kmem_cache_open()->init_kmem_cache_nodes->early_kmem_cache_node_alloc() ->new_slab()->allocate_slab()->alloc_slab_page()->alloc_pages_exact_node() ->__alloc_pages()->__alloc_pages_nodemask();
커널 버전을 3.13.11로 바꿨습니다.

53th (2014/05/10) week 53차
51th (2014/04/19) week 51차
50th (2014/04/12) week 50차
49th (2014/04/05) week 49차
48th (2014/03/29) week 48차
47th (2014/03/22) week 47차
46th (2014/03/15) week 46차

...

23th (2013/09/28) week 23차
22th (2013/09/21) week 22차

boot/compressed/head.S
kernel/head.S

21th (2013/09/14) week 21차

page_address_init()
pr_notice()
setup_arch()->setup_processor()

...

=======

12th (2013-07-13) week 12차 18+2명
11th (2013-07-06) week 11차 18+2명

arch/arm/boot/compressed/head.S 분석
_setup_mmu 종료

10th (2013-06-29) week 10차 22명

arch/arm/boot/compressed/head.S 분석
_setup_mmu 진입직전

09th (2013-06-22) week 09차 25명

Arm System Developer's Guide (Ch.14 ~ 끝)
arch/arm/boot/compressed/head.S 분석
call_cache_fn 진입직전

08th (2013-06-15) week [08차] 21명

Arm System Developer's Guide (Ch.09 ~ Ch.14.4 페이지 테이블)

07th (2013-06-08) week [07차] 20명

Arm System Developer's Guide (시작 ~ Ch.09 인터럽트 처리방법)

06th (2013-06-01) week [06차]

ARM v7 아키텍쳐 세미나

05th (2013-05-25) week [05차]

ARM v7 아키텍쳐 세미나

04th (2013-05-18) week [04차] 28명+1 (백창우님)

Arm System Developer's Guide (pt자료)

03th (2013-05-11) week [03차] 22명

리눅스 커널 내부구조 (p.150 ~ 끝)

02th (2013-05-04) week [02차] 27명

리눅스 커널 내부구조 (p. 88~ p.150)

01th (2013-04-28) week [01차] 34명

리눅스 커널 내부구조 (처음 ~ p. 88)

hephaex/kernel_review

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