From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@suse.de>,
tglx@linutronix.de, torvalds@linux-foundation.org,
linux-kernel@vger.kernel.org, willy@infradead.org, hpa@zytor.com,
kirill.shutemov@linux.intel.com, peterz@infradead.org,
luto@amacapital.net, linux-tip-commits@vger.kernel.org
Subject: Re: [tip:x86/boot] x86/boot/compressed/64: Prepare trampoline memory
Date: Mon, 26 Feb 2018 11:15:34 +0300 [thread overview]
Message-ID: <20180226081533.GA5308@uranus.lan> (raw)
In-Reply-To: <20180226080256.j7jzuxyokx42uytd@node.shutemov.name>
On Mon, Feb 26, 2018 at 11:02:56AM +0300, Kirill A. Shutemov wrote:
...
> > Also, could do a puts() hexdump of the affected memory area _before_ we overwrite
> > it? Is it empty? Could we add some debug warning that checks that it's all zeroes?
>
> The problem is that we don't really have a way get a message out of there.
>
> http://lkml.kernel.org/r/793b9c55-e85b-97b5-c857-dd8edcda4081@zytor.com
>
I'm sorry for stepping in (since I didn't follow the series in details)
but can't we use vga memory here and print this early data tere?
next prev parent reply other threads:[~2018-02-26 8:15 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-09 14:22 [PATCHv9 0/4] x86: 5-level related changes into decompression code Kirill A. Shutemov
2018-02-09 14:22 ` Kirill A. Shutemov
2018-02-09 14:22 ` [PATCHv9 1/4] x86/boot/compressed/64: Rename pagetable.c to kaslr_64.c Kirill A. Shutemov
2018-02-09 14:22 ` Kirill A. Shutemov
2018-02-11 12:18 ` [tip:x86/boot] " tip-bot for Kirill A. Shutemov
2018-02-09 14:22 ` [PATCHv9 2/4] x86/boot/compressed/64: Introduce paging_prepare() Kirill A. Shutemov
2018-02-09 14:22 ` Kirill A. Shutemov
2018-02-11 12:19 ` [tip:x86/boot] " tip-bot for Kirill A. Shutemov
2018-02-09 14:22 ` [PATCHv9 3/4] x86/boot/compressed/64: Prepare trampoline memory Kirill A. Shutemov
2018-02-09 14:22 ` Kirill A. Shutemov
2018-02-11 12:19 ` [tip:x86/boot] " tip-bot for Kirill A. Shutemov
2018-02-13 18:32 ` Cyrill Gorcunov
2018-02-24 21:48 ` Borislav Petkov
2018-02-25 10:52 ` Kirill A. Shutemov
2018-02-25 12:29 ` Borislav Petkov
2018-02-25 14:09 ` Kirill A. Shutemov
2018-02-26 7:35 ` Ingo Molnar
2018-02-26 7:50 ` Ingo Molnar
2018-02-26 8:04 ` Kirill A. Shutemov
2018-02-26 8:02 ` Kirill A. Shutemov
2018-02-26 8:15 ` Cyrill Gorcunov [this message]
2018-02-26 8:37 ` Kirill A. Shutemov
2018-02-26 8:49 ` Cyrill Gorcunov
2018-02-26 8:47 ` Ingo Molnar
2018-02-26 10:54 ` Borislav Petkov
2018-02-09 14:22 ` [PATCHv9 4/4] x86/boot/compressed/64: Handle 5-level paging boot if kernel is above 4G Kirill A. Shutemov
2018-02-09 14:22 ` Kirill A. Shutemov
2018-02-11 12:20 ` [tip:x86/boot] " tip-bot for Kirill A. Shutemov
2018-02-13 6:51 ` Andrei Vagin
2018-02-13 8:08 ` Kirill A. Shutemov
2018-02-13 8:41 ` Andrei Vagin
2018-02-13 9:02 ` Kirill A. Shutemov
2018-02-13 9:43 ` Ingo Molnar
2018-02-13 10:00 ` Kirill A. Shutemov
2018-02-13 11:32 ` Ingo Molnar
2018-02-13 16:53 ` Andrei Vagin
2018-02-13 17:17 ` Ingo Molnar
2018-02-13 17:59 ` Dmitry Safonov
2018-02-13 18:05 ` Ingo Molnar
2018-02-13 17:21 ` tip-bot for Kirill A. Shutemov
2018-02-13 17:42 ` Kirill A. Shutemov
2018-02-13 18:09 ` tip-bot for Kirill A. Shutemov
2018-02-11 11:37 ` [PATCHv9 0/4] x86: 5-level related changes into decompression code Ingo Molnar
2018-02-11 11:37 ` Ingo Molnar
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