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authorTejun Heo <tj@kernel.org>2018-06-07 17:05:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:34 -0700
commitbb98f2c5ac5db92d34908dbac81a8de7c47c8353 (patch)
treee8545ddd4cc053639171a106e958bb40f5f021bd /mm/swap_state.c
parentmm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct (diff)
downloadlinux-dev-bb98f2c5ac5db92d34908dbac81a8de7c47c8353.tar.xz
linux-dev-bb98f2c5ac5db92d34908dbac81a8de7c47c8353.zip
mm, memcontrol: move swap charge handling into get_swap_page()
Patch series "mm, memcontrol: Implement memory.swap.events", v2. This patchset implements memory.swap.events which contains max and fail events so that userland can monitor and respond to swap running out. This patch (of 2): get_swap_page() is always followed by mem_cgroup_try_charge_swap(). This patch moves mem_cgroup_try_charge_swap() into get_swap_page() and makes get_swap_page() call the function even after swap allocation failure. This simplifies the callers and consolidates memcg related logic and will ease adding swap related memcg events. Link: http://lkml.kernel.org/r/20180416230934.GH1911913@devbig577.frc2.facebook.com Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Roman Gushchin <guro@fb.com> Cc: Rik van Riel <riel@surriel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_state.c')
-rw-r--r--mm/swap_state.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 07f9aa2340c3..ab8e59cd18ea 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -216,9 +216,6 @@ int add_to_swap(struct page *page)
if (!entry.val)
return 0;
- if (mem_cgroup_try_charge_swap(page, entry))
- goto fail;
-
/*
* Radix-tree node allocations from PF_MEMALLOC contexts could
* completely exhaust the page allocator. __GFP_NOMEMALLOC