From: "H. Peter Anvin" <hpa@zytor.com>
To: "Zhang, Jun" <jun.zhang@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "x86@kernel.org" <x86@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Fleming, Matt" <matt.fleming@intel.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] crash dump: don't delete non-E820_RAM during init
Date: Mon, 05 Nov 2012 03:39:12 +0100 [thread overview]
Message-ID: <509726D0.4010606@zytor.com> (raw)
In-Reply-To: <88DC34334CA3444C85D647DBFA962C270FD7F4B6@SHSMSX102.ccr.corp.intel.com>
On 11/05/2012 02:37 AM, Zhang, Jun wrote:
> Hello, Gortmaker
> I will modify my subject. Thanks!
>
> Hello, Anvin
> from our three options, I think third option is better. But in 3) option, there are two choose, 3.1) is like memmap=REMOVERAM, 3.2) is memmap=CRASHKDUMP.
> In 3.1) we maybe need ifdef/endif within the { } of the function (like exactmap).
> In 3.2) we can remove the ifdef/endif.
> Which one is the better? Maybe you have a better solution, please share it.
> Thanks!
>
> Next is our three option.
> 1) my patch.
> 2) modify kexec, only pass two parameters -- memmap=544K@64K
> memmap=64964K@32768K, in kernel setup_memory_map, we can remove RAM
> range.
> 3) add extra optional, 3.1) like memmap=REMOVERAM
> 3.2) like memmap=CRASHKDUMP
>
Again, 2 would be better because it is a localized change to kexec. If
that works I don't see why there is any reason to change anything else.
-hpa
next prev parent reply other threads:[~2012-11-05 2:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-31 1:26 [PATCH] To crash dump, we need keep other memory type except E820_RAM, because other type come from BIOS or firmware is used by other code(for example: PCI_MMCONFIG) Zhang, Jun
2012-10-31 2:46 ` H. Peter Anvin
2012-10-31 3:39 ` Zhang, Jun
2012-10-31 4:38 ` H. Peter Anvin
2012-10-31 5:22 ` Zhang, Jun
2012-10-31 5:38 ` H. Peter Anvin
2012-11-01 2:15 ` Zhang, Jun
2012-11-01 4:20 ` H. Peter Anvin
2012-11-01 8:49 ` Zhang, Jun
2012-11-02 15:08 ` Paul Gortmaker
2012-11-02 16:37 ` H. Peter Anvin
2012-11-05 1:37 ` [PATCH] crash dump: don't delete non-E820_RAM during init Zhang, Jun
2012-11-05 2:39 ` H. Peter Anvin [this message]
2012-11-05 2:57 ` Zhang, Jun
2012-11-05 2:59 ` H. Peter Anvin
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