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From: Borislav Petkov <bp@alien8.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	alex@ghiti.fr, aou@eecs.berkeley.edu,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	Qian Cai <cai@lca.pw>, Catalin Marinas <catalin.marinas@arm.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	dave.jiang@intel.com, David Miller <davem@davemloft.net>,
	Dmitry Vyukov <dvyukov@google.com>,
	Alexander Potapenko <glider@google.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Peter Anvin <hpa@zytor.com>, James Morse <james.morse@arm.com>,
	James Hogan <jhogan@kernel.org>,
	Kan Liang <kan.liang@linux.intel.com>,
	Linux-MM <linux-mm@kvack.org>,
	Russell King - ARM Linux <linux@armlinux.org.uk>,
	Andrew Lutomirski <luto@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	mawilcox@microsoft.com, Ingo Molnar <mingo@elte.hu>,
	mm-commits@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
	n-horiguchi@ah.jp.nec.com, Palmer Dabbelt <palmer@sifive.com>,
	Paul Burton <paul.burton@mips.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Paul Mackerras <paulus@samba.org>,
	Peter Zijlstra <peterz@infradead.org>,
	ralf@linux-mips.org, shashim@codeaurora.org,
	Steven Price <steven.price@arm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	vgupta@synopsys.com, Will Deacon <will@kernel.org>,
	zong.li@sifive.com
Subject: Re: [patch 064/158] mm: add generic ptdump
Date: Sun, 1 Dec 2019 16:10:11 +0100	[thread overview]
Message-ID: <20191201151010.GC6629@zn.tnic> (raw)
In-Reply-To: <CAHk-=wiaAbELGZCYZHBsAmxSeK9YdZrrp-RX057x8QoWFva4qw@mail.gmail.com>

On Sun, Dec 01, 2019 at 06:45:23AM -0800, Linus Torvalds wrote:
> On Sun, Dec 1, 2019 at 1:09 AM Borislav Petkov <bp@alien8.de> wrote:
> >
> > That generic ptdump stuff is probably causing a splat on 32-bit:
> >
> > https://lkml.kernel.org/r/20191125144946.GA6628@duo.ucw.cz
> 
> Hmm. I'm not sure about code generation, but for me that config gives me

Note that I typed "probably" above because I'm not 100% sure it is
those patches that would cause it. I mean, I saw EIP pointing to
ptdump_pte_entry and was able to repro on linux-next with the .config in
a vm.

But then your master or tip/master wouldn't trigger so I shelved that as
it is merge window and other 32-bit shit was broken, which needed more
attention.

So lemme first confirm it really is caused by those patches.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette


  reply	other threads:[~2019-12-01 15:10 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-01  1:53 [patch 064/158] mm: add generic ptdump akpm
2019-12-01  9:07 ` Borislav Petkov
2019-12-01 14:45   ` Linus Torvalds
2019-12-01 15:10     ` Borislav Petkov [this message]
2019-12-01 15:21       ` Borislav Petkov
2019-12-01 15:45         ` Borislav Petkov
2019-12-02  9:09           ` Steven Price
2019-12-02 15:42             ` Borislav Petkov
2019-12-03 10:47 ` David Hildenbrand
2019-12-03 11:00   ` David Hildenbrand

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