linux-kernel - Re: [syzbot] [mm?] INFO: rcu detected stall in purge_vmap

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Message-ID: <20260112133815.2190-1-hdanton@sina.com>
Date: Mon, 12 Jan 2026 21:38:13 +0800
From: Hillf Danton <hdanton@...a.com>
To: kartikey406@...il.com
Cc: syzbot <syzbot+d8d4c31d40f868eaea30@...kaller.appspotmail.com>,
	akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	syzkaller-bugs@...glegroups.com,
	urezki@...il.com
Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in purge_vmap_node

> Date: Mon, 12 Jan 2026 05:13:02 -0800
> Hello,
> 
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> INFO: rcu detected stall in x64_sys_call
> 
Given the test result of your patch, can you specify the root cause of the
stall reported, Deepanshu?