qmail uses 100% cpu after FreeBSD-5.0 to 5.1 upgrade

[Don Lewis]

On 16 Jun, Jesse Guardiani wrote:

> I run qmail on my 4.8 servers.
> 
> For my sanity, is this a problem in 5.1-RELEASE, or in code after 5.1-RELEASE?
> We haven't upgraded to 5.1 yet (and don't intend to for a while), but I thought
> I'd ask since this bug would cripple our mail server.

It was broken in 5.1-CURRENT shortly after 5.1-RELEASE, until I
committed a patch a few minutes ago.  5.1-RELEASE is fine.  The
problematic versions of fifo_vnops.c are 1.87 and 1.88.