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Date:   Wed, 25 Dec 2019 16:45:18 +0800
From:   Fengguang Wu <fengguang.wu@intel.com>
To:     Hui Zhu <teawater@gmail.com>
Cc:     linux-kernel@vger.kernel.org, Hui Zhu <teawaterz@linux.alibaba.com>
Subject: Re: [PATCH for vm-scalability] usemem: Fix the build warning
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Thanks teawater!

>-	write(1, buf, len);
>+	if (write(1, buf, len) != len)
>+		printf("Output buf \"%s\" fail\n", buf);

Changed it to

                fprintf(stderr, "WARNING: statistics output may be incomplete.\n");

Thanks,
Fengguang