Terry Lambert wrote:
> Peter Wemm wrote:
> > No.  It gives the ability for a thread to block on a syscall without
> > stalling the entire system.  Just try using mysqld on a system using libc_r
> > and heavy disk IO.  You can't select() on a read() from disk.  Thats the
> > ultimate reason to do it.  The SMP parallelism is a bonus.
> Bug in FreeBSD's NBIO implementation.  A read() that would result
> in page-in needs to queue the request, but return EAGAIN to user
> space to indicate the request cannot be satisfied.  Making select()
> come true for disk I/O after the fault is satisfied is a seperate
> issue.  Probably need to pass the fd all the way down.

Umm Terry.. we have zero infrastructure to support this.

"All of this is for nothing if we don't go to the stars" - JMS/B5

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