From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: Jiufei Xue <jiufei.xue@linux.alibaba.com>, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, joseph.qi@linux.alibaba.com
Subject: Re: [PATCH] mm: fix sleeping function warning in alloc_swap_info
Date: Tue, 29 Jan 2019 20:43:20 +0900 [thread overview]
Message-ID: <132b9310-2478-19e1-aed3-48a2b448ca50@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <20190129072154.63783-1-jiufei.xue@linux.alibaba.com>
On 2019/01/29 16:21, Jiufei Xue wrote:
> Trinity reports BUG:
>
> sleeping function called from invalid context at mm/vmalloc.c:1477
> in_atomic(): 1, irqs_disabled(): 0, pid: 12269, name: trinity-c1
>
> [ 2748.573460] Call Trace:
> [ 2748.575935] dump_stack+0x91/0xeb
> [ 2748.578512] ___might_sleep+0x21c/0x250
> [ 2748.581090] remove_vm_area+0x1d/0x90
> [ 2748.583637] __vunmap+0x76/0x100
> [ 2748.586120] __se_sys_swapon+0xb9a/0x1220
> [ 2748.598973] do_syscall_64+0x60/0x210
> [ 2748.601439] entry_SYSCALL_64_after_hwframe+0x49/0xbe
>
> This is triggered by calling kvfree() inside spinlock() section in
> function alloc_swap_info().
> Fix this by moving the kvfree() after spin_unlock().
>
Excuse me? But isn't kvfree() safe to be called with spinlock held?
There was no context explanation regarding kvfree() for 4.18.20.
4.19.18 says
Context: Any context except NMI.
and 4.20.5 says
Context: Either preemptible task context or not-NMI interrupt.
. There might be users who didn't notice this change.
next prev parent reply other threads:[~2019-01-29 11:43 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-29 7:21 Jiufei Xue
2019-01-29 8:53 ` Aaron Lu
2019-01-29 10:43 ` Joseph Qi
2019-01-29 11:19 ` Aaron Lu
2019-01-29 11:43 ` Tetsuo Handa [this message]
2019-01-29 19:13 ` Andrew Morton
2019-01-29 21:12 ` Tetsuo Handa
2019-01-29 21:51 ` Yang Shi
2019-01-30 0:42 ` Tetsuo Handa
2019-01-30 1:01 ` Andrew Morton
2019-01-30 1:11 ` Linus Torvalds
2019-01-30 1:23 ` Linus Torvalds
2019-01-30 2:54 ` Tetsuo Handa
2019-01-30 17:18 ` Linus Torvalds
2019-01-30 22:13 ` Andrew Morton
2019-03-07 14:43 ` Aaron Lu
2019-03-07 14:47 ` Andrey Ryabinin
2019-03-07 15:24 ` Aaron Lu
2019-03-07 16:33 ` Andrey Ryabinin
2019-03-08 2:41 ` Aaron Lu
2019-03-11 1:43 ` Jiufei Xue
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