Re: single copy pipe/fifo

[David S. Miller]

Manfred Spraul writes:
 > process 2 (on cpu 1)
 > 	read(fd,buf,64kB).
 > 	* reads the data
 > 	* now it must wake up, but it will return from the syscall, thus
 > wake_up_interruptible().

Oh, I see and thus the pre-kiovec case would be:

process 2 (on cpu 1)
	read(fd, buf,64kb)
	* reads 4K
	* wake_up_interruptible_sync()
	* sleep()
	* reads 4K

etc etc.

Later,
David S. Miller
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