Commit fe9ebb8c authored by Xiongwei Song's avatar Xiongwei Song Committed by Tejun Heo
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docs: cgroup-v1: correct the term of Page Cache organization in inode 



The radix-tree for Page Cache has been replaced with xarray, see
commit eb797a8e ("page cache: Rearrange address_space"), so move
"radix-tree" to "xarray".

Signed-off-by: default avatarXiongwei Song <xiongwei.song@windriver.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 714e08cc

Documentation/admin-guide/cgroup-v1/memory.rst

+2 −2
Original line number Diff line number Diff line
@@ -197,11 +197,11 @@ are not accounted. We just account pages under usual VM management. 


RSS pages are accounted at page_fault unless they've already been accounted

for earlier. A file page will be accounted for as Page Cache when it's

inserted into inode (radix-tree). While it's mapped into the page tables of

inserted into inode (xarray). While it's mapped into the page tables of

processes, duplicate accounting is carefully avoided.



An RSS page is unaccounted when it's fully unmapped. A PageCache page is

unaccounted when it's removed from radix-tree. Even if RSS pages are fully

unaccounted when it's removed from xarray. Even if RSS pages are fully

unmapped (by kswapd), they may exist as SwapCache in the system until they

are really freed. Such SwapCaches are also accounted.

A swapped-in page is accounted after adding into swapcache.