linux-kernel - [PATCH v2 0/1] Dont allocate pages on a offline node

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Message-Id: <20211207224013.880775-1-npache@redhat.com>
Date:   Tue,  7 Dec 2021 17:40:12 -0500
From:   Nico Pache <npache@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org
Cc:     shakeelb@...gle.com, ktkhai@...tuozzo.com, shy828301@...il.com,
        guro@...com, vbabka@...e.cz, vdavydov.dev@...il.com,
        raquini@...hat.com, mhocko@...e.com, david@...hat.com
Subject: [PATCH v2 0/1] Dont allocate pages on a offline node

Prevent page allocations from occuring on an offlined by adding a check
to confirm the node is online and if not, use the closest node. Some
further work is needed for my previous solution to be complete. This
will provide a fix to the problem while the more complete solution is
being worked on.

V2:
 * drop the first patch that will introduce a regression by adding a
   branch in the hotpath.
 * Remove the for_each_online_nodes introduced as that will require
   further work for memcg and hotplug to work correctly. Long term a
   rework will be needed to either allocate all pgdatas or update all
   memcgs when a new node is onlined.

Signed-off-by: Nico Pache <npache@...hat.com>

Nico Pache (1):
  mm/vmscan.c: Prevent allocating shrinker_info on offlined nodes

 mm/vmscan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

-- 
2.33.1