K 10
svn:author
V 5
silby
K 8
svn:date
V 27
2004-02-08T07:35:48.000000Z
K 7
svn:log
V 575
Add the SF_NODISKIO flag to sendfile.  This flag causes sendfile to be
mindful of blocking on disk I/O and instead return EBUSY when such
blocking would occur.

Results from the DeBox project indicate that blocking on disk I/O
can slow the performance of a kqueue/poll based webserver.  Using
a flag such as SF_NODISKIO and throwing connections that would block
to helper processes/threads helped increase performance.

Currently, only the Flash webserver uses this flag, although it could
probably be applied to thttpd with relative ease.

Idea by:	Yaoping Ruan & Vivek Pai

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