cvs commit: src/sys/sys umtx.h src/sys/kern kern_umtx.c

[Jeff Roberson]

On Wed, 2 Apr 2008, David Xu wrote:

> davidxu     2008-04-02 04:08:37 UTC
>
>  FreeBSD src repository
>
>  Modified files:
>    sys/sys              umtx.h
>    sys/kern             kern_umtx.c
>  Log:
>  Introduce kernel based userland rwlock. Each umtx chain now has two lists,
>  one for readers and one for writers, other types of synchronization
>  object just use first list.

Hey great David!  This made an even bigger difference than I originally 
measured.  Once we get a little more concurrency in the io layer with 
myisam it'll really shine.

Thanks,
Jeff

>
>  Asked by: jeff
>
>  Revision  Changes    Path
>  1.65      +487 -45   src/sys/kern/kern_umtx.c
>  1.31      +21 -1     src/sys/sys/umtx.h
>