Re: [PATCH] memcg: do not call reclaim if !__GFP_WAIT

[Andrew Morton]

On Thu, 28 May 2015 20:26:06 +0300 Vladimir Davydov <vdavydov@xxxxxxxxxxxxx> wrote:

> When trimming memcg consumption excess (see memory.high), we call
> try_to_free_mem_cgroup_pages without checking if we are allowed to sleep
> in the current context, which can result in a deadlock. Fix this.

Why does it deadlock?  try_to_free_mem_cgroup_pages() is passed the
gfp_mask and should honour its __GFP_WAIT setting?

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