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使用 fallocate 快速占用磁盘空间
source link: https://blog.shuf.io/post/use-fallocate-to-reserve-disk-space
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Oct 07, 2023
使用 fallocate 快速占用磁盘空间
简单记一下：
$ fallocate -l 180G /tmp/testfile
底下调用的就是 fallocate()/posix_fallocate() 这个系统调用。内核的话，例如 ext4，实现是在 fs/ext4/extents.c 的 ext4_fallocate
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