Commit 20e845db authored by Dongliang Mu's avatar Dongliang Mu Committed by Jonathan Corbet
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docs/zh_CN: update the translation of mm/page_owner.rst 



Update to commit f5c12105 ("mm,page_owner: fix refcount imbalance")

Documentation/translations/zh_CN/mm/page_owner.rst
commit f5c12105 ("mm,page_owner: fix refcount imbalance")
commit ba6fe537 ("mm,page_owner: update Documentation regarding
page_owner_stacks")
2 commits needs resolving in total

Signed-off-by: default avatarDongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: default avatarAlex Shi <alexs@kernel.org>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
Message-ID: <38a9d8868e0f98dc5d2a08fb865313cc4db943a3.1729327831.git.dzm91@hust.edu.cn>
parent 9d197b62

Documentation/translations/zh_CN/mm/page_owner.rst

+46 −0
Original line number Diff line number Diff line
@@ -26,6 +26,9 @@ page owner是用来追踪谁分配的每一个页面。它可以用来调试内 
页面所有者也可以用于各种目的。例如，可以通过每个页面的gfp标志信息获得精确的碎片

统计。如果启用了page owner，它就已经实现并激活了。我们非常欢迎其他用途。



它也可以用来显示所有的栈以及它们当前分配的基础页面数，这让我们能够快速了解内存的

使用情况，而无需浏览所有页面并匹配分配和释放操作。



page owner在默认情况下是禁用的。所以，如果你想使用它，你需要在你的启动cmdline

中加入"page_owner=on"。如果内核是用page owner构建的，并且由于没有启用启动

选项而在运行时禁用page owner，那么运行时的开销是很小的。如果在运行时禁用，它不
@@ -60,6 +63,49 @@ page owner在默认情况下是禁用的。所以，如果你想使用它，你 


4) 分析来自页面所有者的信息::



	cat /sys/kernel/debug/page_owner_stacks/show_stacks > stacks.txt

	cat stacks.txt

	 post_alloc_hook+0x177/0x1a0

	 get_page_from_freelist+0xd01/0xd80

	 __alloc_pages+0x39e/0x7e0

	 allocate_slab+0xbc/0x3f0

	 ___slab_alloc+0x528/0x8a0

	 kmem_cache_alloc+0x224/0x3b0

	 sk_prot_alloc+0x58/0x1a0

	 sk_alloc+0x32/0x4f0

	 inet_create+0x427/0xb50

	 __sock_create+0x2e4/0x650

	 inet_ctl_sock_create+0x30/0x180

	 igmp_net_init+0xc1/0x130

	 ops_init+0x167/0x410

	 setup_net+0x304/0xa60

	 copy_net_ns+0x29b/0x4a0

	 create_new_namespaces+0x4a1/0x820

	nr_base_pages: 16

	...

	...

	echo 7000 > /sys/kernel/debug/page_owner_stacks/count_threshold

	cat /sys/kernel/debug/page_owner_stacks/show_stacks> stacks_7000.txt

	cat stacks_7000.txt

	 post_alloc_hook+0x177/0x1a0

	 get_page_from_freelist+0xd01/0xd80

	 __alloc_pages+0x39e/0x7e0

	 alloc_pages_mpol+0x22e/0x490

	 folio_alloc+0xd5/0x110

	 filemap_alloc_folio+0x78/0x230

	 page_cache_ra_order+0x287/0x6f0

	 filemap_get_pages+0x517/0x1160

	 filemap_read+0x304/0x9f0

	 xfs_file_buffered_read+0xe6/0x1d0 [xfs]

	 xfs_file_read_iter+0x1f0/0x380 [xfs]

	 __kernel_read+0x3b9/0x730

	 kernel_read_file+0x309/0x4d0

	 __do_sys_finit_module+0x381/0x730

	 do_syscall_64+0x8d/0x150

	 entry_SYSCALL_64_after_hwframe+0x62/0x6a

	nr_base_pages: 20824

	...



	cat /sys/kernel/debug/page_owner > page_owner_full.txt

	./page_owner_sort page_owner_full.txt sorted_page_owner.txt