Re: Is sendfile all that sexy?

[Matti Aarnio]

On Mon, Jan 15, 2001 at 03:24:55PM +0000, Jonathan Thackray wrote:
> It's a very useful system call and makes file serving much more
> scalable, and I'm glad that most Un*xes now have support for it
> (Linux, FreeBSD, HP-UX, AIX, Tru64). The next cool feature to add to
> Linux is sendpath(), which does the open() before the sendfile()
> all combined into one system call.

	One thing about 'sendfile' (and likely 'sendpath') is that
	current (hammered into running binaries -> unchangeable)
	syscalls support only up to 2GB files at 32 bit systems.

	Glibc 2.2(9) at RedHat  <sys/sendfile.h>:

#ifdef __USE_FILE_OFFSET64
# error "<sendfile.h> cannot be used with _FILE_OFFSET_BITS=64"
#endif

	I do admit that doing  sendfile()  on some extremely large
	file is unlikely, but still...

> Ugh, I hear you all scream :-)
> Jon.
> -- 
> Jonathan Thackray         Zeus House, Cowley Road, Cambridge CB4 OZT, UK
> Zeus Technology                                     http://www.zeus.com/

/Matti Aarnio