On Thu, Apr 29, 2004 at 04:26:32PM -0700, Andrew Morton wrote:

The only application which we know will exercise that code is the distcc
server.  Making that little change while testing the patch will increase
the chance of shaking out any problems.

if you're scared it has bugs I think it'd be more useful to change it to
"|| 1" and run it under some stress test, and then remove the "|| 1".
the aio code in unmap_kvec is also a big user of that.  a schedule every
40M of ram freed isn't too nice to my eyes (but I doubt it can be
measured).