linux-kernel - Re: [PATCH v3 0/3] page_owner: Fix refcount imbalance

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Message-ID: <ZgwUP17giMgGksXc@localhost.localdomain>
Date: Tue, 2 Apr 2024 16:20:47 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Kefeng Wang <wangkefeng.wang@...wei.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Michal Hocko <mhocko@...e.com>,
	Vlastimil Babka <vbabka@...e.cz>, Marco Elver <elver@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Alexander Potapenko <glider@...gle.com>
Subject: Re: [PATCH v3 0/3] page_owner: Fix refcount imbalance

On Fri, Mar 29, 2024 at 12:54:30PM +0800, Kefeng Wang wrote:
> I still see the following memory leak, could you check it?
> 
> /mnt/arm64 # cat /sys//kernel/debug/kmemleak
> unreferenced object 0xffff000200d91000 (size 16):
>   comm "kworker/4:0", pid 42, jiffies 4294892753
>   hex dump (first 16 bytes):
>     60 37 57 c1 00 00 ff ff 00 00 00 00 00 00 00 00  `7W.............
>   backtrace (crc 4458f477):
>     [<(____ptrval____)>] kmemleak_alloc+0x3c/0x50
>     [<(____ptrval____)>] kmalloc_trace+0x20c/0x2e0
>     [<(____ptrval____)>] __set_page_owner+0x1d0/0x2a0
>     [<(____ptrval____)>] prep_new_page+0x108/0x138
>     [<(____ptrval____)>] get_page_from_freelist+0x79c/0x16b8
>     [<(____ptrval____)>] __alloc_pages+0x1bc/0x440
>     [<(____ptrval____)>] new_slab+0x104/0x3c8
>     [<(____ptrval____)>] ___slab_alloc+0x368/0xb20
>     [<(____ptrval____)>] __slab_alloc.isra.0+0x3c/0x88
>     [<(____ptrval____)>] kmalloc_trace+0x280/0x2e0
>     [<(____ptrval____)>] __set_page_owner+0x1d0/0x2a0
>     [<(____ptrval____)>] prep_new_page+0x108/0x138
>     [<(____ptrval____)>] get_page_from_freelist+0x79c/0x16b8
>     [<(____ptrval____)>] __alloc_pages+0x1bc/0x440
>     [<(____ptrval____)>] new_slab+0x104/0x3c8
>     [<(____ptrval____)>] ___slab_alloc+0x368/0xb20

Hi Kefeng Wang

You seem to be missing [1]

Could you try with that patch applied?

[1] https://lore.kernel.org/linux-mm/20240315222610.6870-1-osalvador@suse.de/

Thanks

-- 
Oscar Salvador
SUSE Labs