From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: mhocko@kernel.org
Cc: linux-mm@kvack.org, wei.w.wang@intel.com, willy@infradead.org,
mst@redhat.com
Subject: Is GFP_HIGHUSER[_MOVABLE] | __GFP_NOMEMALLOC) & ~__GFP_DIRECT_RECLAIM supported?
Date: Tue, 2 Jan 2018 11:08:47 +0900 [thread overview]
Message-ID: <201801021108.BCC17635.FQtOHMOLJSVFFO@I-love.SAKURA.ne.jp> (raw)
virtio-balloon wants to try allocation only when that allocation does not cause
OOM situation. Since there is no gfp flag which succeeds allocations only if
there is plenty of free memory (i.e. higher watermark than other requests),
virtio-balloon needs to watch for OOM notifier and release just allocated memory
when OOM notifier is invoked.
Currently virtio-balloon is using
GFP_HIGHUSER[_MOVABLE] | __GFP_NOMEMALLOC | __GFP_NORETRY
for allocation, but is
GFP_HIGHUSER[_MOVABLE] | __GFP_NOMEMALLOC) & ~__GFP_DIRECT_RECLAIM
supported (from MM subsystem's point of view) ?
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next reply other threads:[~2018-01-02 2:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-02 2:08 Tetsuo Handa [this message]
2018-01-02 9:14 ` Michal Hocko
2018-01-02 9:56 ` Tetsuo Handa
2018-01-02 11:40 ` Michal Hocko
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