On Sat, 16 May 2009, Abhiman Yashpal Karkera wrote: > Hi all, > I am a newbie to Freebsd OS. I had a query regarding performing writes onto > a disk. > > Generally when we want to write some data we first copy the data from the > processes user space to the kernel buffer and hand this buffer to the device > driver who then goes and initiated a write to the h/w. > > Now my question here is that the kernel buffers are very limited in size , > what happens if i have a really huge chunk of data to be written, won't the > above mechanism of copying from userland to kernel buffer be slow ? > > thanks, > Abhiman
RDMA is one possibility. Zero-copy networking is an illustration of RDMA. You may also want to look up VIA http://www.intel.com/intelpress/chapter-via.pdf thanks Saifi. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
