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Subject: Re: [PATCH] KVM: selftests: do not require 64GB in
 set_memory_region_test
To:     Christian Borntraeger <borntraeger@de.ibm.com>
CC:     Shuah Khan <shuah@kernel.org>, Paolo Bonzini <pbonzini@redhat.com>,
        <kvm@vger.kernel.org>, <linux-kselftest@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <linux-s390@vger.kernel.org>,
        <vkuznets@redhat.com>, <wanghaibin.wang@huawei.com>
References: <20210701160425.33666-1-borntraeger@de.ibm.com>
From:   Zenghui Yu <yuzenghui@huawei.com>
Message-ID: <93ff00d3-b369-e00e-f172-7cc5375a6485@huawei.com>
Date:   Fri, 2 Jul 2021 14:49:35 +0800
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On 2021/7/2 0:04, Christian Borntraeger wrote:
> Unless the user sets overcommit_memory or has plenty of swap, the latest
> changes to the testcase will result in ENOMEM failures for hosts with
> less than 64GB RAM. As we do not use much of the allocated memory, we
> can use MAP_NORESERVE to avoid this error.

Had a go on arm64:

Tested-by: Zenghui Yu <yuzenghui@huawei.com>

Thanks,
Zenghui