例如，可能没有其他缓冲区空间。

There may be no more buffer room, for example.

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因此实际上存在处理缓冲区空间不足的两种可能方式。

So there are really two major possibilities for dealing with running out of space.

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第三个值是发送缓冲区空间的最大字节数（该值会被 wmem_max 覆盖）。

The third value is the maximum send buffer space (overridden by wmem_max).

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现在数据被储存在用户地址空间缓冲区。

Now the data is stored in the user address space buffer.

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缓冲区具有有限的空间。

Buffers have a limited amount of space.

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此处提供的page缓冲区在内核空间中。

The page buffer provided here is in kernel space.

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copy _ from_user函数将数据块从用户空间复制到内核缓冲区。

The copy_from_user function copies a block of data from user space into a kernel buffer.

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当卷的使用空间变满后每一次重启缓冲区的大小都将会减半。

Each time the rest of the disk becomes full, the buffer size is halved.

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当卷的使用空间变满后每一次重启缓冲区的大小都将会减半。

Each time the rest of the disk becomes full, the buffer size is halved.

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