From: Guenter Roeck <linux@roeck-us.net>
To: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Roman Gushchin <roman.gushchin@linux.dev>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 10/17] mm/slab: kmalloc: pass requests larger than order-1 page to page allocator
Date: Fri, 14 Oct 2022 13:58:18 -0700 [thread overview]
Message-ID: <20221014205818.GA1428667@roeck-us.net> (raw)
In-Reply-To: <20220817101826.236819-11-42.hyeyoo@gmail.com>
Hi,
On Wed, Aug 17, 2022 at 07:18:19PM +0900, Hyeonggon Yoo wrote:
> There is not much benefit for serving large objects in kmalloc().
> Let's pass large requests to page allocator like SLUB for better
> maintenance of common code.
>
> Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
> Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
> ---
This patch results in a WARNING backtrace in all mips and sparc64
emulations.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at mm/slab_common.c:729 kmalloc_slab+0xc0/0xdc
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-11990-g9c9155a3509a #1
Stack : ffffffff 801b2a18 80dd0000 00000004 00000000 00000000 81023cd4 00000000
81040000 811a9930 81040000 8104a628 81101833 00000001 81023c78 00000000
00000000 00000000 80f5d858 81023b98 00000001 00000023 00000000 ffffffff
00000000 00000064 00000002 81040000 81040000 00000001 80f5d858 000002d9
00000000 00000000 80000000 80002000 00000000 00000000 00000000 00000000
...
Call Trace:
[<8010a2bc>] show_stack+0x38/0x118
[<80cf5f7c>] dump_stack_lvl+0xac/0x104
[<80130d7c>] __warn+0xe0/0x224
[<80cdba5c>] warn_slowpath_fmt+0x64/0xb8
[<8028c058>] kmalloc_slab+0xc0/0xdc
irq event stamp: 0
hardirqs last enabled at (0): [<00000000>] 0x0
hardirqs last disabled at (0): [<00000000>] 0x0
softirqs last enabled at (0): [<00000000>] 0x0
softirqs last disabled at (0): [<00000000>] 0x0
---[ end trace 0000000000000000 ]---
Guenter
next prev parent reply other threads:[~2022-10-14 20:58 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-17 10:18 [PATCH v4 00/17] common kmalloc v4 Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 01/17] mm/slab: move NUMA-related code to __do_cache_alloc() Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 02/17] mm/slab: cleanup slab_alloc() and slab_alloc_node() Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 03/17] mm/slab_common: remove CONFIG_NUMA ifdefs for common kmalloc functions Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 04/17] mm/slab_common: cleanup kmalloc_track_caller() Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 05/17] mm/sl[au]b: factor out __do_kmalloc_node() Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 06/17] mm/slab_common: fold kmalloc_order_trace() into kmalloc_large() Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 07/17] mm/slub: move kmalloc_large_node() to slab_common.c Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 08/17] mm/slab_common: kmalloc_node: pass large requests to page allocator Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 09/17] mm/slab_common: cleanup kmalloc_large() Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 10/17] mm/slab: kmalloc: pass requests larger than order-1 page to page allocator Hyeonggon Yoo
2022-10-14 20:58 ` Guenter Roeck [this message]
2022-10-14 23:48 ` Hyeonggon Yoo
2022-10-15 19:39 ` Vlastimil Babka
2022-10-16 9:10 ` Hyeonggon Yoo
2022-10-15 4:34 ` [PATCH] mm/slab: use kmalloc_node() for off slab freelist_idx_t array allocation Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 11/17] mm/sl[au]b: introduce common alloc/free functions without tracepoint Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 12/17] mm/sl[au]b: generalize kmalloc subsystem Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 13/17] mm/sl[au]b: cleanup kmem_cache_alloc[_node]_trace() Hyeonggon Yoo
2022-08-23 15:04 ` Vlastimil Babka
2022-08-24 3:54 ` Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 14/17] mm/slab_common: unify NUMA and UMA version of tracepoints Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 15/17] mm/slab_common: drop kmem_alloc & avoid dereferencing fields when not using Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 16/17] mm/slab_common: move declaration of __ksize() to mm/slab.h Hyeonggon Yoo
2022-08-17 10:18 ` [PATCH v4 17/17] mm/sl[au]b: check if large object is valid in __ksize() Hyeonggon Yoo
2022-08-23 15:12 ` Vlastimil Babka
2022-08-24 3:52 ` Hyeonggon Yoo
2022-08-23 15:16 ` [PATCH v4 00/17] common kmalloc v4 Vlastimil Babka
2022-08-24 3:58 ` Hyeonggon Yoo
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