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From: peterz@infradead.org
To: Michal Suchanek <msuchanek@suse.de>
Cc: linuxppc-dev@lists.ozlabs.org,
	Michael Ellerman <mpe@ellerman.id.au>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Nicholas Piggin <npiggin@gmail.com>,
	Santosh Sivaraj <santosh@fossix.org>,
	Christophe Leroy <christophe.leroy@csgroup.eu>,
	Ganesh Goudar <ganeshgr@linux.ibm.com>,
	Mahesh Salgaonkar <mahesh@linux.ibm.com>,
	Alistair Popple <alistair@popple.id.au>,
	Jordan Niethe <jniethe5@gmail.com>,
	Mike Rapoport <rppt@kernel.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH] Revert "powerpc/64s: machine check interrupt update NMI accounting"
Date: Tue, 15 Sep 2020 20:16:42 +0200	[thread overview]
Message-ID: <20200915181642.GF2674@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200915180659.12503-1-msuchanek@suse.de>

On Tue, Sep 15, 2020 at 08:06:59PM +0200, Michal Suchanek wrote:
> This reverts commit 116ac378bb3ff844df333e7609e7604651a0db9d.
> 
> This commit causes the kernel to oops and reboot when injecting a SLB
> multihit which causes a MCE.
> 
> Before this commit a SLB multihit was corrected by the kernel and the
> system continued to operate normally.
> 
> cc: stable@vger.kernel.org
> Fixes: 116ac378bb3f ("powerpc/64s: machine check interrupt update NMI accounting")
> Signed-off-by: Michal Suchanek <msuchanek@suse.de>

Ever since 69ea03b56ed2 ("hardirq/nmi: Allow nested nmi_enter()")
nmi_enter() supports nesting natively.

WARNING: multiple messages have this Message-ID (diff)
From: peterz@infradead.org
To: Michal Suchanek <msuchanek@suse.de>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
	Santosh Sivaraj <santosh@fossix.org>,
	Alistair Popple <alistair@popple.id.au>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Mahesh Salgaonkar <mahesh@linux.ibm.com>,
	Nicholas Piggin <npiggin@gmail.com>,
	linux-kernel@vger.kernel.org, Jordan Niethe <jniethe5@gmail.com>,
	Paul Mackerras <paulus@samba.org>,
	Ganesh Goudar <ganeshgr@linux.ibm.com>,
	stable@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	Mike Rapoport <rppt@kernel.org>
Subject: Re: [PATCH] Revert "powerpc/64s: machine check interrupt update NMI accounting"
Date: Tue, 15 Sep 2020 20:16:42 +0200	[thread overview]
Message-ID: <20200915181642.GF2674@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200915180659.12503-1-msuchanek@suse.de>

On Tue, Sep 15, 2020 at 08:06:59PM +0200, Michal Suchanek wrote:
> This reverts commit 116ac378bb3ff844df333e7609e7604651a0db9d.
> 
> This commit causes the kernel to oops and reboot when injecting a SLB
> multihit which causes a MCE.
> 
> Before this commit a SLB multihit was corrected by the kernel and the
> system continued to operate normally.
> 
> cc: stable@vger.kernel.org
> Fixes: 116ac378bb3f ("powerpc/64s: machine check interrupt update NMI accounting")
> Signed-off-by: Michal Suchanek <msuchanek@suse.de>

Ever since 69ea03b56ed2 ("hardirq/nmi: Allow nested nmi_enter()")
nmi_enter() supports nesting natively.

  reply	other threads:[~2020-09-15 18:30 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-15  8:43 Injecting SLB miltihit crashes kernel 5.9.0-rc5 Michal Suchánek
2020-09-15 12:54 ` Michael Ellerman
2020-09-16  0:51   ` Nicholas Piggin
2020-09-15 18:06 ` [PATCH] Revert "powerpc/64s: machine check interrupt update NMI accounting" Michal Suchanek
2020-09-15 18:06   ` Michal Suchanek
2020-09-15 18:16   ` peterz [this message]
2020-09-15 18:16     ` peterz
2020-09-16  9:00     ` Michal Suchánek
2020-09-16  9:00       ` Michal Suchánek
2020-09-16  7:12 ` Injecting SLB miltihit crashes kernel 5.9.0-rc5 Mahesh Jagannath Salgaonkar

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