Commit d8769544 authored by T.J. Mercier's avatar T.J. Mercier Committed by Tejun Heo
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docs: cgroup-v1: Update charge-commit section 



Commit 1d8f136a ("memcg/hugetlb: remove memcg hugetlb
try-commit-cancel protocol") removed mem_cgroup_commit_charge() and
mem_cgroup_cancel_charge(), but the docs still refer to those functions.
There is no longer any charge cancellation.

Update the docs to match the code.

Signed-off-by: default avatarT.J. Mercier <tjmercier@google.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 93618edf

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

+2 −4
Original line number Diff line number Diff line
@@ -47,21 +47,19 @@ Please note that implementation details can be changed. 
	  Called when swp_entry's refcnt goes down to 0. A charge against swap

	  disappears.



3. charge-commit-cancel

3. charge-commit

=======================



	Memcg pages are charged in two steps:



		- mem_cgroup_try_charge()

		- mem_cgroup_commit_charge() or mem_cgroup_cancel_charge()

		- commit_charge()



	At try_charge(), there are no flags to say "this page is charged".

	at this point, usage += PAGE_SIZE.



	At commit(), the page is associated with the memcg.



	At cancel(), simply usage -= PAGE_SIZE.



Under below explanation, we assume CONFIG_SWAP=y.



4. Anonymous