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SubjectRe: [PATCH] hugetlb: Add nohugepages parameter to prevent hugepages creation
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On 10/15/19 9:18 AM, Michal Hocko wrote:
> I do agree with Qian Cai here. Kdump kernel requires a very tailored
> environment considering it is running in a very restricted
> configuration. The hugetlb pre-allocation sounds like a tooling problem
> and should be fixed at that layer.
>

Hi Michal, thanks for your response. Can you suggest me a current way of
preventing hugepages for being created, using userspace? The goal for
this patch is exactly this, introduce such a way.

As I've said before, Ubuntu kdump rely on rootfs mounting and there's no
official statement or documentation that say it's wrong to do this way -
although I agree initrd-only approach is more safe. But since Ubuntu
kdump rely on rootfs mount, we couldn't find a way to effectively
prevent the creation of hugepages completely, hence we tried to
introduce one.

Cheers,


Guilherme

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