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From: Baoquan He <bhe@redhat.com>
To: Thomas Garnier <thgarnie@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
	Ingo Molnar <mingo@kernel.org>
Subject: Re: KASLR causes intermittent boot failures on some systems
Date: Tue, 25 Apr 2017 09:18:25 +0800	[thread overview]
Message-ID: <20170425011825.GA4622@x1> (raw)
In-Reply-To: <CAJcbSZEWB27HHtP6zVQA+qJJ7uvWqZz+Y-kYFE0aTM2-jj72iQ@mail.gmail.com>

On 04/24/17 at 05:41pm, Thomas Garnier wrote:
> On Mon, Apr 24, 2017 at 4:07 PM, Baoquan He <bhe@redhat.com> wrote:
> > Yeah, according to my debugging tracking, it goes as Dan said. And the
> > is_ram is REGION_DISJOINT. And till arch_add_memory, the parameters
> > passed to arch_add_memory are "arch_add_memory, align_start:0x10000000000, align_size:0x3000000000",
> > seems it's going well.
> 
> Hum ok, I hope it was another path given it seems the page table is
> correctly setup on this one.
> 
> Maybe looking at the PTEs with and without crash might help? (setting
> this if statement to 1:
> http://lxr.free-electrons.com/source/arch/x86/mm/init_64.c#L360)

The page_size_mask is PG_LEVEL_1G, it should only enter into
phys_pud_init and return.

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WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Thomas Garnier <thgarnie@google.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Jeff Moyer <jmoyer@redhat.com>, Ingo Molnar <mingo@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"linux-nvdimm@lists.01.org" <linux-nvdimm@ml01.01.org>
Subject: Re: KASLR causes intermittent boot failures on some systems
Date: Tue, 25 Apr 2017 09:18:25 +0800	[thread overview]
Message-ID: <20170425011825.GA4622@x1> (raw)
In-Reply-To: <CAJcbSZEWB27HHtP6zVQA+qJJ7uvWqZz+Y-kYFE0aTM2-jj72iQ@mail.gmail.com>

On 04/24/17 at 05:41pm, Thomas Garnier wrote:
> On Mon, Apr 24, 2017 at 4:07 PM, Baoquan He <bhe@redhat.com> wrote:
> > Yeah, according to my debugging tracking, it goes as Dan said. And the
> > is_ram is REGION_DISJOINT. And till arch_add_memory, the parameters
> > passed to arch_add_memory are "arch_add_memory, align_start:0x10000000000, align_size:0x3000000000",
> > seems it's going well.
> 
> Hum ok, I hope it was another path given it seems the page table is
> correctly setup on this one.
> 
> Maybe looking at the PTEs with and without crash might help? (setting
> this if statement to 1:
> http://lxr.free-electrons.com/source/arch/x86/mm/init_64.c#L360)

The page_size_mask is PG_LEVEL_1G, it should only enter into
phys_pud_init and return.

  reply	other threads:[~2017-04-25  1:18 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-07 14:41 KASLR causes intermittent boot failures on some systems Jeff Moyer
2017-04-07 14:41 ` Jeff Moyer
2017-04-07 14:49 ` Thomas Garnier
2017-04-07 14:49   ` Thomas Garnier
2017-04-07 14:51   ` Jeff Moyer
2017-04-07 14:51     ` Jeff Moyer
2017-04-07 21:25 ` Kees Cook
2017-04-07 21:25   ` Kees Cook
2017-04-10 15:49   ` Jeff Moyer
2017-04-10 15:49     ` Jeff Moyer
2017-04-10 18:13     ` Kees Cook
2017-04-10 18:13       ` Kees Cook
2017-04-10 18:22       ` Jeff Moyer
2017-04-10 18:22         ` Jeff Moyer
2017-04-10 19:03         ` Kees Cook
2017-04-10 19:03           ` Kees Cook
2017-04-10 19:18           ` Jeff Moyer
2017-04-10 19:18             ` Jeff Moyer
2017-04-08  2:51 ` Baoquan He
2017-04-08  2:51   ` Baoquan He
2017-04-08  4:08 ` Baoquan He
2017-04-08  4:08   ` Baoquan He
2017-04-08  7:02   ` Dan Williams
2017-04-08  7:02     ` Dan Williams
2017-04-08  7:52     ` Baoquan He
2017-04-08  7:52       ` Baoquan He
2017-04-10 15:57   ` Jeff Moyer
2017-04-10 15:57     ` Jeff Moyer
2017-04-12  8:24 ` Dave Young
2017-04-12  8:24   ` Dave Young
2017-04-12  8:24   ` Dave Young
2017-04-12  8:27   ` Dave Young
2017-04-12  8:27     ` Dave Young
2017-04-12  8:27     ` Dave Young
2017-04-12  8:40   ` Dave Young
2017-04-12  8:40     ` Dave Young
2017-04-12  8:40     ` Dave Young
2017-04-12 12:52     ` Jeff Moyer
2017-04-12 12:52       ` Jeff Moyer
2017-04-12 12:52       ` Jeff Moyer
2017-04-19 13:36 ` Baoquan He
2017-04-19 13:36   ` Baoquan He
2017-04-19 14:27   ` Thomas Garnier
2017-04-19 14:27     ` Thomas Garnier
2017-04-19 14:34     ` Dan Williams
2017-04-19 14:34       ` Dan Williams
2017-04-19 14:56       ` Baoquan He
2017-04-19 14:56         ` Baoquan He
2017-04-19 14:56       ` Thomas Garnier
2017-04-19 14:56         ` Thomas Garnier
2017-04-19 14:55     ` Baoquan He
2017-04-19 14:55       ` Baoquan He
2017-04-20 13:26     ` Baoquan He
2017-04-20 13:26       ` Baoquan He
2017-04-24 20:37       ` Thomas Garnier
2017-04-24 20:37         ` Thomas Garnier
2017-04-24 20:52         ` Dan Williams
2017-04-24 20:52           ` Dan Williams
2017-04-24 23:07           ` Baoquan He
2017-04-24 23:07             ` Baoquan He
2017-04-24 23:18             ` Dan Williams
2017-04-24 23:18               ` Dan Williams
2017-04-24 23:56               ` Baoquan He
2017-04-24 23:56                 ` Baoquan He
2017-04-25  0:41             ` Thomas Garnier
2017-04-25  0:41               ` Thomas Garnier
2017-04-25  1:18               ` Baoquan He [this message]
2017-04-25  1:18                 ` Baoquan He
2017-05-01 11:32 ` Baoquan He
2017-05-01 11:32   ` Baoquan He

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