From: Linus Torvalds <torvalds@linux-foundation.org>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: David Hildenbrand <david@redhat.com>,
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, mhocko@suse.com,
penberg@kernel.org, rientjes@google.com,
roman.gushchin@linux.dev, urezki@gmail.com,
v-songbaohua@oppo.com, vbabka@suse.cz,
virtualization@lists.linux.dev
Subject: Re: [PATCH v3 0/4] mm: clarify nofail memory allocation
Date: Thu, 22 Aug 2024 06:59:08 +0800 [thread overview]
Message-ID: <CAHk-=wi9Z4QmmfeYo6aynRFbCA-_+FG83HYxXz2wVWfxjPyXSA@mail.gmail.com> (raw)
In-Reply-To: <CALOAHbDP9d6GNNhjB30zKiaMh_HvToKDGZ3sO9tkxRu5+HpEZQ@mail.gmail.com>
On Wed, 21 Aug 2024 at 20:41, Yafang Shao <laoar.shao@gmail.com> wrote:
>
> One potential approach could be to rename GFP_NOFAIL to
> GFP_NOFAIL_FOR_SMALL_ALLOC, specifically for smaller allocations, and
> to clear this flag for larger allocations.
Yes, that sounds like a good way to make sure people don't blame the
MM layer when they themselves were the cause of problems.
> However, the challenge lies
> in determining what constitutes a 'small' allocation.
I think we could easily just stick to the historical "order <
PAGE_ALLOC_COSTLY_ORDER":
* PAGE_ALLOC_COSTLY_ORDER is the order at which allocations are deemed
* costly to service.
(And the value for that is 3 - orders 0-2 are considered "cheap")
Linus
next prev parent reply other threads:[~2024-08-21 22:59 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
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 [this message]
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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