From: Michal Hocko <mhocko@suse.com>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: "Barry Song" <21cnbao@gmail.com>,
akpm@linux-foundation.org, linux-mm@kvack.org,
42.hyeyoo@gmail.com, cl@linux.com, hailong.liu@oppo.com,
hch@infradead.org, iamjoonsoo.kim@lge.com, penberg@kernel.org,
rientjes@google.com, roman.gushchin@linux.dev,
torvalds@linux-foundation.org, urezki@gmail.com,
v-songbaohua@oppo.com, vbabka@suse.cz,
virtualization@lists.linux.dev,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Kees Cook" <kees@kernel.org>,
"Eugenio Pérez" <eperezma@redhat.com>,
"Jason Wang" <jasowang@redhat.com>,
"Maxime Coquelin" <maxime.coquelin@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Xuan Zhuo" <xuanzhuo@linux.alibaba.com>
Subject: Re: [PATCH v3 4/4] mm: prohibit NULL deference exposed for unsupported non-blockable __GFP_NOFAIL
Date: Mon, 19 Aug 2024 16:01:21 +0200 [thread overview]
Message-ID: <ZsNQMe8hSKLVa-yG@tiehlicka> (raw)
In-Reply-To: <CALOAHbDCpxV=5raOB=t8Xtnxb9fZu_uaC3TmKvY767SDRJQvPw@mail.gmail.com>
On Mon 19-08-24 20:17:36, Yafang Shao wrote:
> My question is why is that ? Why not let it loop around the allocator?
Because of 2 reasons. It is much easier to see NOFAIL allocations when
they are annotated properly (try to grep for all sorts of endless loops)
and also the allocator can make sertain heuristics if it knows that
allocation must not fail.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2024-08-19 14:01 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-17 6:24 [PATCH v3 0/4] mm: clarify nofail memory allocation Barry Song
2024-08-17 6:24 ` [PATCH v3 1/4] vduse: avoid using __GFP_NOFAIL Barry Song
2024-08-17 6:24 ` [PATCH v3 2/4] mm: document __GFP_NOFAIL must be blockable Barry Song
2024-08-17 6:24 ` [PATCH v3 3/4] mm: BUG_ON to avoid NULL deference while __GFP_NOFAIL fails Barry Song
2024-08-19 9:43 ` David Hildenbrand
2024-08-19 9:47 ` Barry Song
2024-08-19 9:55 ` David Hildenbrand
2024-08-19 10:02 ` Barry Song
2024-08-19 12:33 ` David Hildenbrand
2024-08-19 12:48 ` Barry Song
2024-08-19 12:49 ` David Hildenbrand
2024-08-19 17:12 ` Michal Hocko
2024-08-19 17:17 ` Linus Torvalds
2024-08-19 20:24 ` David Hildenbrand
2024-08-19 20:35 ` Linus Torvalds
2024-08-19 21:57 ` David Hildenbrand
2024-08-19 22:13 ` Linus Torvalds
2024-08-20 6:17 ` Michal Hocko
2024-08-19 12:49 ` Christoph Hellwig
2024-08-19 12:51 ` David Hildenbrand
2024-08-19 12:53 ` Christoph Hellwig
2024-08-19 13:14 ` David Hildenbrand
2024-08-19 13:05 ` Barry Song
2024-08-19 13:10 ` David Hildenbrand
2024-08-19 13:19 ` Barry Song
2024-08-19 13:22 ` David Hildenbrand
2024-08-17 6:24 ` [PATCH v3 4/4] mm: prohibit NULL deference exposed for unsupported non-blockable __GFP_NOFAIL Barry Song
2024-08-18 2:55 ` Yafang Shao
2024-08-18 3:48 ` Barry Song
2024-08-18 5:51 ` Yafang Shao
2024-08-18 6:27 ` Barry Song
2024-08-18 6:45 ` Barry Song
2024-08-18 7:07 ` Yafang Shao
2024-08-18 7:25 ` Barry Song
2024-08-19 7:51 ` Michal Hocko
2024-08-19 7:50 ` Michal Hocko
2024-08-19 9:25 ` Yafang Shao
2024-08-19 9:39 ` Barry Song
2024-08-19 9:45 ` Yafang Shao
2024-08-19 10:10 ` Barry Song
2024-08-19 11:56 ` Yafang Shao
2024-08-19 12:09 ` Michal Hocko
2024-08-19 12:17 ` Yafang Shao
2024-08-19 14:01 ` Michal Hocko [this message]
2024-08-19 10:17 ` Michal Hocko
2024-08-19 11:56 ` Yafang Shao
2024-08-19 12:04 ` Michal Hocko
2024-08-19 9:44 ` David Hildenbrand
2024-08-19 10:19 ` Michal Hocko
2024-08-19 12:48 ` David Hildenbrand
2024-08-19 13:02 ` [PATCH v3 0/4] mm: clarify nofail memory allocation David Hildenbrand
2024-08-19 16:05 ` Linus Torvalds
2024-08-19 19:23 ` Barry Song
2024-08-19 19:33 ` Linus Torvalds
2024-08-19 21:48 ` Barry Song
2024-08-20 6:24 ` Michal Hocko
2024-08-21 12:40 ` Yafang Shao
2024-08-21 22:59 ` Linus Torvalds
2024-08-22 6:21 ` Michal Hocko
2024-08-22 6:40 ` Linus Torvalds
2024-08-22 6:56 ` Linus Torvalds
2024-08-22 7:47 ` Michal Hocko
2024-08-22 7:57 ` Barry Song
2024-08-22 8:24 ` Michal Hocko
2024-08-22 8:39 ` David Hildenbrand
2024-08-22 9:08 ` Linus Torvalds
2024-08-22 9:16 ` Michal Hocko
2024-08-22 9:24 ` Linus Torvalds
2024-08-22 9:11 ` Michal Hocko
2024-08-22 9:18 ` Linus Torvalds
2024-08-22 9:33 ` Michal Hocko
2024-08-22 9:44 ` Linus Torvalds
2024-08-22 9:59 ` Michal Hocko
2024-08-22 10:30 ` Linus Torvalds
2024-08-22 10:46 ` Michal Hocko
2024-08-22 9:27 ` David Hildenbrand
2024-08-22 9:34 ` Linus Torvalds
2024-08-22 9:43 ` David Hildenbrand
2024-08-22 9:53 ` Linus Torvalds
2024-08-22 11:58 ` Johannes Weiner
2024-08-26 12:10 ` Vlastimil Babka
2024-08-27 6:57 ` Linus Torvalds
2024-08-27 7:15 ` Barry Song
2024-08-27 7:38 ` Vlastimil Babka
2024-08-27 7:50 ` Barry Song
2024-08-29 10:24 ` Vlastimil Babka
2024-08-29 11:53 ` Barry Song
2024-08-29 13:20 ` Michal Hocko
2024-08-29 21:27 ` Barry Song
2024-08-29 22:31 ` Barry Song
2024-08-30 7:24 ` Michal Hocko
2024-08-30 7:37 ` Vlastimil Babka
2024-08-22 9:41 ` Michal Hocko
2024-08-22 9:42 ` David Hildenbrand
2024-08-22 7:01 ` Gao Xiang
2024-08-22 7:54 ` Michal Hocko
2024-08-22 8:04 ` Gao Xiang
2024-08-22 14:35 ` Yafang Shao
2024-08-22 15:02 ` Gao Xiang
2024-08-22 6:37 ` Barry Song
2024-08-22 14:22 ` Yafang Shao
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