From: ebiederm@xmission.com (Eric W. Biederman)
To: Cong Wang <amwang@redhat.com>
Cc: Vitaly Mayatskikh <v.mayatskih@gmail.com>,
Neil Horman <nhorman@tuxdriver.com>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
Haren Myneni <hbabu@us.ibm.com>, Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH 0/5] Add second memory region for crash kernel
Date: Thu, 22 Apr 2010 22:42:25 -0700 [thread overview]
Message-ID: <m1zl0uiv26.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <4BD12E48.3080400@redhat.com> (Cong Wang's message of "Fri\, 23 Apr 2010 13\:21\:12 +0800")
Cong Wang <amwang@redhat.com> writes:
> Eric W. Biederman wrote:
>> Vivek Goyal <vgoyal@redhat.com> writes:
>>
>>> Vitaly, have you really run into cases where 2G upper limit is a concern.
>>> What is the configuration you have, how much memory it has and how much
>>> memory are you planning to reserve for kdump kernel?
>>
>> A good question.
>>
>
> We have observed that on a machine which has 66G memory, when we do
> crashkernel=1G@4G, kexec failed to load the crash kernel, but the memory
> reservation _did_ succeed.
Did you try loading vmlinux? If not this sounds like the fact that
/sbin/kexec doesn't realize it can boot a 64bit bzImage in 64bit
mode.
Eric
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WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: Cong Wang <amwang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>,
Vitaly Mayatskikh <v.mayatskih@gmail.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Haren Myneni <hbabu@us.ibm.com>,
Neil Horman <nhorman@tuxdriver.com>,
kexec@lists.infradead.org
Subject: Re: [PATCH 0/5] Add second memory region for crash kernel
Date: Thu, 22 Apr 2010 22:42:25 -0700 [thread overview]
Message-ID: <m1zl0uiv26.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <4BD12E48.3080400@redhat.com> (Cong Wang's message of "Fri\, 23 Apr 2010 13\:21\:12 +0800")
Cong Wang <amwang@redhat.com> writes:
> Eric W. Biederman wrote:
>> Vivek Goyal <vgoyal@redhat.com> writes:
>>
>>> Vitaly, have you really run into cases where 2G upper limit is a concern.
>>> What is the configuration you have, how much memory it has and how much
>>> memory are you planning to reserve for kdump kernel?
>>
>> A good question.
>>
>
> We have observed that on a machine which has 66G memory, when we do
> crashkernel=1G@4G, kexec failed to load the crash kernel, but the memory
> reservation _did_ succeed.
Did you try loading vmlinux? If not this sounds like the fact that
/sbin/kexec doesn't realize it can boot a 64bit bzImage in 64bit
mode.
Eric
next prev parent reply other threads:[~2010-04-23 5:42 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-22 16:23 [PATCH 0/5] Add second memory region for crash kernel Vitaly Mayatskikh
2010-04-22 16:23 ` Vitaly Mayatskikh
2010-04-22 16:23 ` [PATCH 1/5] Introduce second memory resource " Vitaly Mayatskikh
2010-04-22 16:23 ` Vitaly Mayatskikh
2010-04-22 16:23 ` [PATCH 2/5] Modify parse_crashkernel* for new syntax Vitaly Mayatskikh
2010-04-22 16:23 ` Vitaly Mayatskikh
2010-04-22 16:23 ` [PATCH 3/5] Support second memory region in crash_shrink_memory() Vitaly Mayatskikh
2010-04-22 16:23 ` Vitaly Mayatskikh
2010-04-22 16:23 ` [PATCH 4/5] x86: use second memory region for dump-capture kernel Vitaly Mayatskikh
2010-04-22 16:23 ` Vitaly Mayatskikh
2010-04-22 16:23 ` [PATCH 5/5] kexec: update documentation Vitaly Mayatskikh
2010-04-22 16:23 ` Vitaly Mayatskikh
2010-04-22 22:07 ` [PATCH 0/5] Add second memory region for crash kernel Eric W. Biederman
2010-04-22 22:07 ` Eric W. Biederman
2010-04-22 22:37 ` H. Peter Anvin
2010-04-22 22:37 ` H. Peter Anvin
2010-04-22 22:45 ` Vivek Goyal
2010-04-22 22:45 ` Vivek Goyal
2010-04-23 0:48 ` Eric W. Biederman
2010-04-23 0:48 ` Eric W. Biederman
2010-04-23 5:21 ` Cong Wang
2010-04-23 5:21 ` Cong Wang
2010-04-23 5:42 ` Eric W. Biederman [this message]
2010-04-23 5:42 ` Eric W. Biederman
2010-04-23 6:43 ` Vitaly Mayatskikh
2010-04-23 6:43 ` Vitaly Mayatskikh
2010-04-23 14:44 ` Vivek Goyal
2010-04-23 14:44 ` Vivek Goyal
2010-04-23 7:08 ` Vitaly Mayatskikh
2010-04-23 7:08 ` Vitaly Mayatskikh
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