答复: linux-next: Fixes tag needs some work in the rcu tree

From: "代子为 (Ziwei Dai)" <Ziwei.Dai@unisoc.com>
To: "paulmck@kernel.org" <paulmck@kernel.org>,
	Stephen Rothwell <sfr@canb.auug.org.au>
Cc: "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Linux Next Mailing List" <linux-next@vger.kernel.org>,
	"王双 (Shuang Wang)" <shuang.wang@unisoc.com>
Subject: 答复: linux-next: Fixes tag needs some work in the rcu tree
Date: Thu, 6 Apr 2023 01:42:15 +0000	[thread overview]
Message-ID: <82b6b670854f4366a4c02543f56be6b7@BJMBX01.spreadtrum.com> (raw)
In-Reply-To: <66b7fceb-0a9d-42c1-987f-1ac6c857d987@paulmck-laptop>

> -----邮件原件-----
> 发件人: Paul E. McKenney <paulmck@kernel.org>
> 发送时间: 2023年4月6日 6:59
> 收件人: Stephen Rothwell <sfr@canb.auug.org.au>
> 抄送: 代子为 (Ziwei Dai) <Ziwei.Dai@unisoc.com>; Linux Kernel Mailing List <linux-kernel@vger.kernel.org>; Linux Next Mailing List
> <linux-next@vger.kernel.org>
> 主题: Re: linux-next: Fixes tag needs some work in the rcu tree
> 
> 
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> 
> 
> On Thu, Apr 06, 2023 at 08:36:19AM +1000, Stephen Rothwell wrote:
> > Hi all,
> >
> > In commit
> >
> >   acdc79917d65 ("rcu/kvfree: Avoid freeing new kfree_rcu() memory
> > after old grace period")
> >
> > Fixes tag
> >
> >   Fixes: 0392bebebf26 ("rcu/kvfree: Avoid freeing new kfree_rcu()
> > memory after old grace period")
> >
> > has these problem(s):
> >
> >   - Subject does not match target commit subject
> >     Just use
> >       git log -1 --format='Fixes: %h ("%s")'
> >
> > Maybe you meant:
> >
> > Fixes: 0392bebebf26 ("rcu: Add multiple in-flight batches of
> > kfree_rcu() work")
> 
> Hello, Stephen,
> 
> There is currently some debate as to exactly which commit(s) introduced the bug, which will hopefully come to a conclusion before
> tomorrow's -next.  If they do not, I will use your correction as a placeholder.
> 
> Just for completeness, the current other two candidates (which appear quite plausible to me) are these:
> 
> Fixes: 34c881745549 ("rcu: Support kfree_bulk() interface in kfree_rcu()")
> Fixes: 5f3c8d620447 ("rcu/tree: Maintain separate array for vmalloc ptrs")
> 
> Ziwei Dai, what are your thoughts on this?  This is from a mainline perspective, my guess being that your investigation involved some
> other Linux-kernel tree.
> 
>                                                         Thanx, Paul

Hi Paul, right, please help correct it.