cvs commit: src/sys/kern kern_fork.c

John Baldwin jhb at
Mon Oct 4 08:21:44 PDT 2004

On Friday 01 October 2004 01:01 am, David Schultz wrote:
> das         2004-10-01 05:01:29 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/kern             kern_fork.c
>   Log:
>   Avoid calling _PHOLD(p1) with p2's lock held, since _PHOLD()
>   may block to swap in p1.  Instead, call _PHOLD earlier, at a
>   point where the only lock held happens to be p1's.

FWIW, I don't think this can actually happen because curthread belonging to p1 
is executing and it wouldn't be executing unless it was swapped in, so I 
don't think that PHOLD could ever have blocked.

John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve"  =

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