Re: [PATCH 4/5] mm, memcg: avoid possible NULL pointer dereferencing in mem_cgroup_init()
From: Miaohe Lin <hidden>
Date: 2021-07-30 01:50:20
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On 2021/7/29 21:52, Matthew Wilcox wrote:
On Thu, Jul 29, 2021 at 08:57:54PM +0800, Miaohe Lin wrote:quoted
rtpn might be NULL in very rare case. We have better to check it before dereferencing it. Since memcg can live with NULL rb_tree_per_node in soft_limit_tree, warn this case and continue.Why would we need to warn? the GFP flags don't contain NOWARN, so we already know an allocation failed.
I see. Will remove it. Many thanks!
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