linux-kernel - Re: [PATCH 04/13] x86, mm: Revert back good

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20121004164630.GB2244@phenom.dumpdata.com>
Date:	Thu, 4 Oct 2012 12:46:30 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jacob Shin <jacob.shin@....com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Tejun Heo <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/13] x86, mm: Revert back good_end setting for 64bit

On Thu, Oct 04, 2012 at 09:19:08AM -0700, Yinghai Lu wrote:
> On Wed, Oct 3, 2012 at 9:51 AM, Jacob Shin <jacob.shin@....com> wrote:
> > Any comments, thoughts? hpa? Yinghai?
> >
> > So it seems that during init_memory_mapping Xen needs to modify page table
> > bits and the memory where the page tables live needs to be direct mapped at
> > that time.
> >
> > Since we now call init_memory_mapping for every E820_RAM range sequencially,
> > the only way to satisfy Xen is to find_early_page_table_space (good_end needs
> > to be within memory already mapped at the time) for every init_memory_mapping
> > call.
> >
> > What do you think Yinghai?
> 
> that may put the page table on near end of every ram range for next
> memory range.
> 
> then kdump may have problem get big range again.

Is there a git commit that explains what the 'big range' problem is?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/