readv: parallel or sequential?

[Ivan Voras]

Hi,

I found this in readv(2):

     For readv() and preadv(), the iovec structure is defined as:

           struct iovec {
                   void   *iov_base;  /* Base address. */
                   size_t iov_len;    /* Length. */
           };

     Each iovec entry specifies the base address and length of an area
in mem-
     ory where data should be placed.  The readv() system call will always
     fill an area completely before proceeding to the next.

Does this mean that, in effect, readv() is just a loop of read() calls
(minus syscall overhead)?

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