[linux-directio] DIO 512 KB limitation

Tridib Chakravarty tridib at alumni.carnegiemellon.edu
Fri May 14 01:06:32 CEST 2004


I had a Q reg. Linux's 512 KB DIO limitation. I dont understand the 512
KB limitation that exists. I see that every every kiobuf has 1024 buffer
heads allocated during alloc_kiovec. That means we should be able to
transfer (1024 * blocksize) number of bytes. So why is KIO_MAX_ATOMIC_IO
512 KB?

  Tridib Chakravarty
  tridib at fastmail.fm

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