From: David Hildenbrand <david@redhat.com>
To: Yongqiang Liu <liuyongqiang13@huawei.com>,
catalin.marinas@arm.com, will.deacon@arm.com
Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
wangkefeng.wang@huawei.com
Subject: Re: [QUESTION] arm64: mmap to the hugetlbfs with hugepagesize=512M got SIGILL
Date: Tue, 1 Jun 2021 17:00:24 +0200 [thread overview]
Message-ID: <c83e557c-636a-6d78-b34a-0fd8aeaf9899@redhat.com> (raw)
In-Reply-To: <e2f5855f-4f05-6341-c0a7-a4ca7069eca7@huawei.com>
On 01.06.21 11:34, Yongqiang Liu wrote:
> Hi Catalin and Will,
>
> when we mmap the addr NULL with MAP_FIXED flag to the hugetlbfs, system
> will return NULL successfully.
>
> My question is: Why mmap to file with the hugepagesize=512M we got
> SIGILL but mmap to the file with hugepagesize=2M we got a success ? Here
> is my test steps:
>
> 1. echo 10 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
>
> echo 10 > /sys/kernel/mm/hugepages/hugepages-524288kB/nr_hugepages
Which values do you get when you read back these knobs?
--
Thanks,
David / dhildenb
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next prev parent reply other threads:[~2021-06-01 15:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-01 9:34 [QUESTION] arm64: mmap to the hugetlbfs with hugepagesize=512M got SIGILL Yongqiang Liu
2021-06-01 15:00 ` David Hildenbrand [this message]
2021-06-02 1:33 ` Yongqiang Liu
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