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Subject[patch 1/4] mm, oom: ensure sysrq+f always passes valid zonelist
With hotpluggable and memoryless nodes, it's possible that node 0 will
not be online, so use the first online node's zonelist rather than
hardcoding node 0 to pass a zonelist with all zones to the oom killer.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Rientjes <rientjes@google.com>
---
drivers/tty/sysrq.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -346,7 +346,8 @@ static struct sysrq_key_op sysrq_term_op = {

static void moom_callback(struct work_struct *ignored)
{
- out_of_memory(node_zonelist(0, GFP_KERNEL), GFP_KERNEL, 0, NULL, true);
+ out_of_memory(node_zonelist(first_online_node, GFP_KERNEL), GFP_KERNEL,
+ 0, NULL, true);
}

static DECLARE_WORK(moom_work, moom_callback);

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