Re: [Patch 0/7] Implement crashkernel=auto
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- To: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
- Subject: Re: [Patch 0/7] Implement crashkernel=auto
- From: Andi Kleen <andi@xxxxxxxxxxxxxx>
- Date: Fri, 7 Aug 2009 23:03:06 +0200
- Cc: Amerigo Wang <amwang@xxxxxxxxxx>, Neil Horman <nhorman@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, tony.luck@xxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxx>, Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, Bernhard Walle <bernhard.walle@xxxxxx>, Kexec Mailing List <kexec@xxxxxxxxxxxxxxxxxxx>
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> As an initial approximation I would use a 32nd of low memory.
That means a 1TB machine will have a 32GB crash kernel.
Surely that's excessive?!?
It would be repeating all the same mistakes people made with hash tables
several years ago.
>
> That can be written to (with enough privileges when no crash kernel is
> loaded) reduce the amount of memory reserved by the crash kernel.
>
> Bernhard does that sound useful to you?
>
> Amerigo does that seem reasonable?
It doesn't sound reasonable to Andi.
Why do you even want to grow the crash kernel that much? Is there
any real problem with a 64-128MB crash kernel?
-Andi
>
--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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