From: Catalin Marinas <catalin.marinas@arm.com>
To: "zhaoyang.huang" <zhaoyang.huang@unisoc.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Nathan Chancellor <nathan@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Zhaoyang Huang <huangzhaoyang@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
ke.wang@unisoc.com,
Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Subject: Re: [PATCHv4 2/2] mm: use stack_depot_early_init for kmemleak
Date: Thu, 19 Jan 2023 10:13:35 +0000 [thread overview]
Message-ID: <Y8kXz63ZmUzc+h7T@arm.com> (raw)
In-Reply-To: <1674091345-14799-2-git-send-email-zhaoyang.huang@unisoc.com>
On Thu, Jan 19, 2023 at 09:22:25AM +0800, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
>
> Mirsad report bellow error which caused by stack_depot_init failed in kvcalloc.
> Solve this by having stackdepot use stack_depot_early_init.
>
> On 1/4/23 17:08, Mirsad Goran Todorovac wrote:
> I hate to bring bad news again, but there seems to be a problem with the output of /sys/kernel/debug/kmemleak:
>
> [root@pc-mtodorov ~]# cat /sys/kernel/debug/kmemleak
> unreferenced object 0xffff951c118568b0 (size 16):
> comm "kworker/u12:2", pid 56, jiffies 4294893952 (age 4356.548s)
> hex dump (first 16 bytes):
> 6d 65 6d 73 74 69 63 6b 30 00 00 00 00 00 00 00 memstick0.......
> backtrace:
> [root@pc-mtodorov ~]#
>
> Apparently, backtrace of called functions on the stack is no longer printed with the list of memory leaks.
> This appeared on Lenovo desktop 10TX000VCR, with AlmaLinux 8.7 and BIOS version M22KT49A (11/10/2022)
> and 6.2-rc1 and 6.2-rc2 builds.
> This worked on 6.1 with the same CONFIG_KMEMLEAK=y and MGLRU enabled on a vanilla mainstream kernel
> from Mr. Torvalds' tree. I don't know if this is deliberate feature for some reason or a bug.
> Please find attached the config, lshw and kmemleak output.
>
> reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
> suggested-by: Vlastimil Babka <vbabka@suse.cz>
> Signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2023-01-19 10:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-19 1:22 [PATCHv4 1/2] mm: move KMEMLEAK's Kconfig items from lib to mm zhaoyang.huang
2023-01-19 1:22 ` [PATCHv4 2/2] mm: use stack_depot_early_init for kmemleak zhaoyang.huang
2023-01-19 10:03 ` Mike Rapoport
2023-01-19 10:13 ` Catalin Marinas [this message]
2023-01-19 10:32 ` Vlastimil Babka
2023-01-19 22:42 ` Andrew Morton
2023-01-20 12:52 ` Vlastimil Babka
2023-01-19 10:04 ` [PATCHv4 1/2] mm: move KMEMLEAK's Kconfig items from lib to mm Mike Rapoport
2023-01-19 10:16 ` Vlastimil Babka
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