Commit 5a53623d authored by Mike Yuan's avatar Mike Yuan Committed by Andrew Morton
Browse files

Documentation/cgroup-v2: clarify that zswap.writeback is ignored if zswap is disabled 

As discussed in [1], zswap-related settings natually lose their effect
when zswap is disabled, specifically zswap.writeback here.  Be explicit
about this behavior.

[1] https://lore.kernel.org/linux-kernel/CAKEwX=Mhbwhh-=xxCU-RjMXS_n=RpV3Gtznb2m_3JgL+jzz++g@mail.gmail.com/

[akpm@linux-foundation.org: fix/simplify text]
Link: https://lkml.kernel.org/r/20240823162506.12117-3-me@yhndnzj.com


Signed-off-by: default avatarMike Yuan <me@yhndnzj.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent fd06ce2c

Documentation/admin-guide/cgroup-v2.rst

+2 −0
Original line number Diff line number Diff line
@@ -1755,6 +1755,8 @@ The following nested keys are defined. 


	Note that this is subtly different from setting memory.swap.max to

	0, as it still allows for pages to be written to the zswap pool.

	This setting has no effect if zswap is disabled, and swapping

	is allowed unless memory.swap.max is set to 0.



  memory.pressure

	A read-only nested-keyed file.