Ok, it's pretty fast, but due to a critical bug fix, there's a new
one going up:
ftp://ftp.kernel.org/pub/linux/kernel/people/davem/zerocopy-2.4.1p10-3.diff.gz
o If sock_writepage is called on path via device without SG support,
the cooked up sock_sendmsg() call needs to switch to KERNEL_DS.
Discovered and fixed by Ingo Molnar.
This does show that not too many people are testing this all that
thoroughly :-) Basically, any sys_sendfile() over TCP using a network
card other than loopback/3c59x/sunhme/acenic would fail with -EFAULT
or even worse a kernel crash depending upon architecture.
Later,
David S. Miller
[EMAIL PROTECTED]
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